Betri za lithiamu-sulfuri zinachukuliwa miongoni mwa teknolojia za kizazi kipya za kuhifadhi nishati kwa sababu sulfuri, kinadharia, hutoa uwezo mahususi wa 1675 mAh g⁻¹ na msongamano wa nishati wa kinadharia wa 2567 Wh kg⁻¹ kwa mfumo wa betri. Hata hivyo, lithium polysulfides zinazoyeyuka zinazoundwa wakati wa kuchaji na kutoa chaji zinaweza kuvuka separator, na kusababisha upotevu wa sulfuri hai na kupungua haraka kwa uwezo.

Katika utafiti huu, watafiti walikuza nanoparticles za zinc sulfide, ZnS, kwenye uso wa tabaka za conductive Ti₃C₂T_x MXene na kutumia composite iliyopatikana kwenye polypropylene separator ya lithium-sulfur cell. Nanoparticles za ZnS zilibuniwa kama physical spacers zinazozuia tabaka za MXene kurundikana tena na pia kama catalytic centers zinazokamata polysulfides kikemikali na kuharakisha conversions zake.

Specific surface area ya ZnS/Ti₃C₂T_x composite ilipimwa kuwa 105,9 m² g⁻¹; kwa Ti₃C₂T_x isiyotibiwa, thamani hii ilikuwa 12,1 m² g⁻¹. Ongezeko la takribani mara 8,8 linaonyesha kwamba ZnS nanoparticles na freeze-drying process zilipunguza dense restacking ya MXene layers.

Katika electrochemical experiments, ZnS/Ti₃C₂T_x iliharakisha conversion ya soluble polysulfides kuwa solid Li₂S na re-oxidation ya Li₂S ikilinganishwa na pure MXene. Li₂S precipitation capacity iliongezeka kutoka 521,7 hadi 605,4 mAh g⁻¹, na dissolution capacity kutoka 489,5 hadi 591,9 mAh g⁻¹. Tafel slope ya corresponding reduction reaction ilipungua kutoka 66,2 hadi 42,8 mV dec⁻¹.

Cell iliyotumia separator iliyopakwa ZnS/Ti₃C₂T_x, katika 0,1 C, ilitoa mwanzoni 1328,8 mAh g⁻¹ na baada ya cycles 200 ikahifadhi %80,1 yake. Cell ilipoendeshwa katika 1 C kwa cycles 1000, ilionyesha capacity loss ya %0,048 kwa cycle. Katika sulfur loading ya juu zaidi, kama 5 mg cm⁻², baada ya cycles 50 capacity retention ya %96,4 iliripotiwa.

Ingawa results zinaahidi, utafiti haujapitia peer review. Uploaded text haina detailed experimental-method section, cell-assembly recipe, electrolyte/sulfur ratio, separator-coating loading, independent-cell replicate numbers, error bars na statistical uncertainties. Kwa hiyo, results zinapaswa kutathminiwa kama indicator ya advanced material design; si kama evidence ya commercial battery performance au long-term reliability.

Tatizo kuu la lithium-sulfur batteries ni nini?

Katika lithium-sulfur cells, sulfuri haibadiliki kuwa Li₂S katika hatua moja. Wakati wa discharge, long-chain soluble lithium polysulfides huundwa kwanza:

\[ \mathrm{Li_2S_n,\quad 4\leq n\leq8} \]

Intermediates hizi zinaweza kuyeyuka kwenye electrolyte na kusafiri kutoka positive electrode kuelekea lithium-metal negative electrode. Polysulfides zilizoreduce kwenye negative electrode zinaweza baadaye kusafirishwa tena kwenda positive electrode. Process hii, inayoitwa “polysulfide shuttle effect”, inaweza kusababisha:

• Active sulfur kuondoka katika eneo linaloweza kutumika,
• Undesired side reactions,
• Deposits kwenye lithium surface,
• Low Coulombic efficiency,
• Rapid capacity loss

zinaweza kutokea.

Sehemu ya pili ya tatizo ni kwamba multistep sulfur reduction na Li₂S oxidation hutokea polepole. Polysulfides zisipobadilishwa kwa kasi ya kutosha, hukaa kwa muda mrefu zaidi katika electrolyte na uwezekano wa kuvuka separator huongezeka. Kwa hiyo, watafiti walijaribu kutengeneza separator surface ambayo si tu inashikilia polysulfides, bali pia inazibadilisha haraka kuwa product inayofuata.

Kwa nini separator iligeuzwa kuwa functional surface?

Separator huzuia positive na negative electrodes kugusana kimwili huku ikiruhusu lithium ions kupita. Conventional polypropylene separators haziadsorb soluble polysulfides kwa nguvu na haziwezi kudhibiti kikemikali mwendo wa species hizi ndani ya cell.

Kuongeza functional layer kwenye upande wa separator unaoelekea cathode kunaweza kutoa kazi tatu:

1. Kuunda physical transport barrier kwa polysulfides,
2. Kufunga polysulfides kikemikali kupitia polar surfaces,
3. Kutoa catalytic interface inayobadilisha bound intermediates kuwa Li₂S au kurudi kuwa sulfur.

Approach hii ilichaguliwa kwa sababu inaweza kupanga reaction zone ndani ya cell bila kubadilisha kabisa main composition ya sulfur cathode.

Kwa nini MXene ilichaguliwa?

Ti₃C₂T_x ni member wa MXene family inayojumuisha two-dimensional transition-metal carbides. Utafiti ulitumia sifa nne za material hii:

• High electronic conductivity,
• Polar surface terminations na titanium centers,
• Layered structure inayofaa kwa lithium-ion motion,
• Flexible na mechanically robust nanosheet framework.

Conductive Ti–C structure inaweza kurahisisha access ya electrons kwa electrically insulating sulfur na Li₂S products. Ti centers kwenye surface na functional groups zenye oxygen au fluorine zinaweza pia kuinteract na polar polysulfides.

Kwa nini restacking ya MXene layers ni tatizo?

Van der Waals forces kati ya MXene nanosheets zinaweza kusababisha layers kukutana uso kwa uso na kurundikana kwa ukaribu. Capillary forces zinazotokea wakati wa conventional drying zinaweza kuongeza restacking hii zaidi.

Layers zinapobanwa:

• Specific surface area hupungua,
• Active titanium na surface groups hazifikiki,
• Electrolyte access channels hufungwa,
• Lithium-ion transport huwa ngumu,
• Polysulfide adsorption na catalytic conversion huzuiwa.

Ingawa carbon-based spacers kama carbon nanotubes au graphene oxide zinaweza kutenganisha MXene layers, interaction ya materials hizi na polar polysulfides ni relatively weak. Kwa hiyo, watafiti walitumia polar ZnS nanoparticles ambazo si tu zinatenganisha layers, bali pia hutoa chemical adsorption na catalysis.

Dual function ya ZnS nanoparticles ni nini?

ZnS nanoparticles zimefafanuliwa katika utafiti kama “dual-functional spacers”:

• Structural function: Hujiweka kati ya MXene layers na kupunguza direct face-to-face contact na restacking.
• Chemical na catalytic function: Huadsorb lithium polysulfides kupitia polar Zn na S centers na kuharakisha multistep sulfur conversion.

Wakati Ti₃C₂T_x inatoa conductive electron pathway, ZnS inatoa chemical-binding centers zaidi. Kwa hiyo, performance ya composite inahusishwa si na property ya ZnS pekee au MXene pekee, bali na interface inayoundwa na components zote mbili kwa pamoja.

Composite iliandaliwaje?

Kwenye ukurasa wa 21 wa utafiti, Kielelezo 1 kinaonyesha synthesis process kwa schematic. Aluminum layers katika Ti₃AlC₂ MAX phase zilitolewa selectively kwa HCl/LiF system na Ti₃C₂T_x ikapatikana. Schematic inaonyesha treatment ya 1 gram Ti₃AlC₂, 20 mL HCl na 1,56 gram LiF katika 38 °C kwa saa 48.

Kisha ZnS ilikuzwa kwenye Ti₃C₂T_x surface kwa hydrothermal method kwa kutumia zinc-containing precursor na sulfur source. Schematic inaonyesha hydrothermal process ya 60 °C na saa 4. Product ilifanyiwa freeze-drying na functional separator layer ikaandaliwa.

Hata hivyo, exact amounts za synthesis precursors, washing conditions, final ZnS/MXene ratio, freeze-drying temperature na duration, composition ya coating mixture, material loading kwenye separator na coating thickness hazijatolewa kikamilifu katika text.

XRD analysis ilithibitisha structures zipi?

Kwa Ti₃C₂T_x, diffraction peak iliyoonekana takribani 5,8° ilitafsiriwa kama peak ya (002) na formation ya layered MXene structure baada ya aluminum kuondolewa kutoka MAX phase.

Baada ya ZnS kukuzwa:

• Takribani 29,8° ZnS (111),
• 48,0° ZnS (220),
• 56,7° ZnS (311)

diffraction signals zilitokea. Kuhifadhiwa kwa peak ya Ti₃C₂T_x (002) kunaonyesha kwamba layered framework haikuharibika kabisa wakati wa hydrothermal process. Hakuna obvious impurity peak iliyoripotiwa katika utafiti.

Size na distribution ya nanoparticles ikoje?

SEM images zinaonyesha kwamba layered morphology ya MXene ilihifadhiwa baada ya ZnS growth na three-dimensional open network ikaumbwa kati ya layers. Katika TEM images, ZnS nanoparticles zilisambazwa kwenye MXene surface bila kuunda large clusters.

Average particle-size distribution ni takribani 72,29 nm. Iliripotiwa kwamba ZnS iliyoandaliwa peke yake chini ya hydrothermal conditions zilezile iliaggregate kwa uwazi, wakati MXene surface ilifanya kazi kama carrier inayosambaza ZnS growth.

0,31 nm lattice spacing katika HRTEM image ilihusishwa na (111) crystal plane ya cubic ZnS. EDS maps kuonyesha Ti, Zn na S signals zikisambaa kwenye eneo lilelile la nanosheet pia kunaunga mkono kwamba ZnS haikukusanyika tu katika large clusters chache.

Surface area ilibadilika kiasi gani?

Surface area iliongezeka takribani mara 8,75. Ingawa pore diameter ilibadilika kwa kiwango kidogo tu, pore volume iliongezeka katika measurement range yote. Watafiti wanaeleza result hii kwa ZnS nanoparticles kutenganisha MXene layers na freeze-drying kuhifadhi open structure.

Ongezeko la surface area pekee halithibitishi catalytic activity; lakini linatoa structural basis kwa Zn, Ti na surface groups nyingi zaidi kuwasiliana na electrolyte.

Coating ni stable kwenye separator?

Katika Supplementary Figure S4, imeelezwa kwamba polypropylene separator ilifunikwa na continuous black layer na hakukuwa na visually exposed bare areas. Coating haikuonyesha obvious peeling au cracking baada ya repeated bending kwa tweezers.

Electrolyte contact angle kwenye ZnS/Ti₃C₂T_x-coated separator, ndani ya sekunde 0,1, ilishuka hadi 7,7°. Small contact angle inaonyesha kwamba electrolyte inaweza kuwet surface kwa haraka. Property hii inaweza kurahisisha electrolyte kuingia kwenye pores na lithium ions kusafirishwa kwenye separator/electrode interface.

Hata hivyo, bending images hizi na full visual sequences za contact-angle comparison ziko katika Supplementary Figures S4–S6. Kwa kuwa supplementary materials hizi hazipo katika uploaded study file, images hazikuweza kukaguliwa independently.

Li₂S precipitation na dissolution zilibadilikaje?

PITT experiments zilitumika kwa conversion ya polysulfides kuwa solid Li₂S na re-dissolution ya Li₂S.

Earlier nucleation na higher precipitation capacity zinaonyesha kwamba formation ya solid Li₂S kutoka soluble polysulfides imeharakishwa. Higher dissolution capacity pia inapendekeza kwamba re-oxidation ya solid Li₂S wakati wa charge imerahisishwa.

Bidirectional effect hii ni muhimu. Kuharakisha discharge reaction pekee hakutatosha ikiwa Li₂S iliyoundwa haiwezi kureconvertiwa kwa ufanisi wakati wa charge inayofuata.

Tafel na activation-energy results zilionyesha nini?

Kwenye ukurasa wa 22 wa utafiti, Kielelezo 2 kinaonyesha Tafel slope ya peak B inayohusiana na reduction ya long-chain polysulfides kuwa Li₂S imetolewa kama:

• Kwa Ti₃C₂T_x 66,2 mV dec⁻¹,
• Kwa ZnS/Ti₃C₂T_x 42,8 mV dec⁻¹

. Lower Tafel slope inaonyesha kwamba current density inaweza kuongezwa kwa smaller additional voltage na interfacial reaction kinetics zimeharakishwa.

Katika activation-energy comparison, imeripotiwa kwamba ZnS/Ti₃C₂T_x composite ilipunguza:

• Energy barrier katika S₈ → polysulfide conversion kwa 57,1 kJ mol⁻¹,
• Energy barrier katika polysulfide → Li₂S conversion kwa 97,4 kJ mol⁻¹

. Hizi si absolute activation energies za composite, bali ni amounts of reduction zilizoripotiwa dhidi ya Ti₃C₂T_x comparison.

Temperature series, fitting equation na replicate number zilizotumika kukokotoa activation energy hazijatolewa kwa undani katika main text.

Lithium-ion transport imeharakishwa?

CV curves zilizopatikana kwa scan rates tofauti zilitathminiwa kwa Randles–Sevcik approach. Lithium-ion diffusion coefficients zilizokokotolewa kwa ZnS/Ti₃C₂T_x-coated cell kwa redox peaks tatu ziliripotiwa kuwa takribani:

• 3,3 × 10⁻⁸ cm² s⁻¹,
• 5,4 × 10⁻⁸ cm² s⁻¹,
• 13,2 × 10⁻⁸ cm² s⁻¹

. Slopes kuwa juu kuliko Ti₃C₂T_x control ilitafsiriwa kama improved ion transport kwenye separator/electrode interface.

Effective electrode area, active-material concentration na fitting parameters nyingine zinazohitajika kukokotoa coefficients hizi hazijatolewa kikamilifu katika uploaded text.

Polysulfide adsorption ilionyeshwaje?

Kiasi sawa cha Ti₃C₂T_x na ZnS/Ti₃C₂T_x kiliongezwa kwenye 2 mL ya 5 mmol L⁻¹ Li₂S₆ solution. Baada ya saa tano:

• Untreated Li₂S₆ solution ilibaki dark yellow-orange,
• Solution yenye Ti₃C₂T_x ilipauka kiasi,
• Solution yenye ZnS/Ti₃C₂T_x ikawa karibu colorless.

Kwenye ukurasa wa 23 wa utafiti, Kielelezo 3 kinaonyesha visual change hii kwa uwazi. UV–vis spectrum pia ilionyesha polysulfide absorbance katika ZnS/Ti₃C₂T_x supernatant kuwa lowest.

Color loss inaunga mkono polysulfides kuondolewa kutoka solution; lakini peke yake haiwezi kutenganisha chemical binding na physical adsorption. Tofauti hii ilichunguzwa kwa XPS measurements.

XPS results zilionyesha chemical interactions zipi?

Baada ya Li₂S₆ adsorption, Zn 2p signals zilisogea kwenye lower binding energies:

Shift hii ilitafsiriwa kwamba Zn centers zinapata electron density wakati zinaingiliana na polysulfides. S–Zn signals zinazohusishwa na ZnS kusogea takribani 0,5 eV kuelekea higher energy pia kunaunga mkono charge redistribution kwenye interface.

New S–O signals zilizoonekana katika 167,9 na 169,3 eV baada ya adsorption zilihusishwa na thiosulfate species. Watafiti walitafsiri hili kuwa polysulfides hazishikiliwi tu kimwili ndani ya pores, bali pia hupitia chemical conversion kwenye surface.

Katika Ti 2p analysis, proportion ya Ti²⁺ iliongezeka, Ti³⁺ ikapungua na Ti–O species zikaongezeka. Mabadiliko haya yanaonyesha kwamba polysulfides zina electronic interaction pia na Ti centers pamoja na ZnS.

Conductive MXene framework ilihifadhiwa wakati wa adsorption?

Katika C 1s spectra, Ti–C na C–C/C=C signals kuhifadhiwa kwa kiasi kikubwa kunaonyesha kwamba polysulfide adsorption haivunji conductive Ti–C framework. Limited changes ziliripotiwa tu katika weakly oxidized carbon groups.

Result hii ni muhimu kwa uwezo wa composite kuendelea na kazi mbili kwa wakati mmoja:

• Chemical polysulfide binding kwenye Zn na Ti centers,
• Electron transport kupitia Ti–C framework.

Ohmic resistance ya cell imepungua?

Katika EIS Nyquist plots, ohmic resistances za cells zote mbili ni takribani 1,57 Ω. Kwa hiyo, performance improvement katika ZnS/Ti₃C₂T_x cell haiwezi kuelezwa tu kwa kupungua kwa electronic resistance ya whole cell.

Utafiti unasema tofauti inatokana zaidi na processes zifuatazo:

• Faster interfacial electron transfer,
• Lower activation polarization,
• Lower concentration polarization,
• Faster Li⁺ na polysulfide transport,
• Facilitated Li₂S nucleation na oxidation.

Katika symmetric-cell Tafel analysis, exchange current density kwa ZnS/Ti₃C₂T_x imeonyeshwa kuwa 9,72 mA cm⁻², na kwa Ti₃C₂T_x takribani 3,3 mA cm⁻².

Polysulfide shuttle current imepungua?

Kwenye ukurasa wa 24 wa utafiti, Kielelezo 4h kinaonyesha kwamba steady shuttle current ya cell iliyotumia ZnS/Ti₃C₂T_x ni clearly lower kuliko Ti₃C₂T_x control.

Low shuttle current ni direct electrochemical indicator kwamba transport ya free polysulfides kupitia separator kwenda counter electrode imezuiwa. Watafiti wanahusisha hili na Zn–S na Ti–S interactions kushikilia polysulfides kwenye interface.

In situ Raman analysis ilionyesha nini?

Time-resolved Raman maps kwenye ukurasa wa 25 wa utafiti zinaonyesha development ya different polysulfide species wakati wa discharge.

Katika ZnS/Ti₃C₂T_x-coated separator:

• S₈²⁻ signal ilipungua haraka,
• S₆²⁻ na S₄²⁻ intermediates zilionekana kwa muda mfupi,
• Intermediates zilitumiwa kwa kasi zaidi na kubadilika kuwa Li₂S₂/Li₂S products.

Katika Ti₃C₂T_x control, polysulfide signals hizo hizo ziliendelea kwa muda mrefu zaidi. Comparison hii inaunga mkono kwamba ZnS-containing composite inapunguza residence time ya soluble intermediates katika electrolyte.

Rate performance ikoje?

Current rate ilipoongezwa, capacity ya cell iliyotumia ZnS/Ti₃C₂T_x ilipungua polepole zaidi kuliko Ti₃C₂T_x control. Current iliporejeshwa hadi 0,1 C, iliripotiwa kwamba capacity ilirudi karibu na initial level.

ZnS/Ti₃C₂T_x cell ilionekana kuhifadhi two characteristic discharge plateaus hata katika high rate ya 9 C, wakati katika Ti₃C₂T_x cell plateau definition ilidhoofika katika 5 C.

Result hii inaonyesha kwamba composite inaweza kuendelea na sulfur-conversion steps chini ya high current bila kuzipoteza kabisa. Hata hivyo, high-rate experiments ni short-term rate tests na long-term 9 C cycling durability haijaonyeshwa.

Performance ya cycles 200 ilionyesha nini?

ZnS-containing separator kuzalisha longer lower discharge plateau kunaonyesha kwamba long-chain polysulfides zilibadilishwa kwa kina zaidi kuwa Li₂S₂/Li₂S. Ratio ya lower-to-upper plateau capacity katika ZnS composite ni 2,97, na katika Ti₃C₂T_x control ni 2,87.

Results zikoje katika high sulfur loading?

Sulfur loading ilipoongezwa hadi 5 mg cm⁻², ZnS/Ti₃C₂T_x cell ilionyesha:

• Katika 0,1 C, initial capacity ya 782,7 mAh g⁻¹,
• Baada ya cycles 50, capacity retention ya %96,4.

Capacity retention ya Ti₃C₂T_x control ilikuwa %79,7.

High sulfur loading ni condition ngumu kutokana na polysulfide formation zaidi, higher electrolyte viscosity na longer ion-transport paths. Hata hivyo, 5 mg cm⁻² peke yake haithibitishi practical-cell conditions; parameters nyingine kama electrolyte/sulfur ratio na lithium excess zinapaswa pia kutathminiwa. Values hizi hazijatolewa katika uploaded text.

Jaribio la cycles 1000 lilionyesha nini?

Katika long-term experiment iliyofanywa katika 1 C, capacity-decay rate per cycle iliripotiwa kuwa:

• Kwa ZnS/Ti₃C₂T_x %0,048,
• Kwa Ti₃C₂T_x %0,083.

Kwenye ukurasa wa 26 wa utafiti, Kielelezo 6g kinaonyesha kwamba ZnS-containing cell ilihifadhi higher capacity kwa cycles 1000.

Katika caption ya Kielelezo 6, rates za lower panels zimeandikwa kinyume: ingawa caption inasema kwa 6c 1 C na kwa 6g 0,1 C, labels zilizo juu ya graphs na main text zinaonyesha kwamba 6c katika 0,1 C inawakilisha cycles 200; na 6g katika 1 C inawakilisha cycles 1000. Katika makala hii, interpretation inayolingana na graph labels, main text na abstract ndiyo imetumika.

Utafiti unaunga mkono conclusions zipi?

• ZnS nanoparticles zilipunguza kwa kiasi kikubwa restacking ya MXene nanosheets.
• Accessible specific surface area ya composite iliongezeka takribani mara 8,8.
• Zn na Ti centers ziliinteract kikemikali na soluble lithium polysulfides.
• Li₂S precipitation na re-oxidation zilifanyika haraka zaidi kuliko pure-MXene control.
• Activation na concentration polarizations zilipungua.
• Polysulfide shuttle current ilipungua.
• Rate na cycling performance ziliimarika katika laboratory cells zilizochunguzwa.
• Short-term capacity retention ilikuwa juu katika sulfur loading ya 5 mg cm⁻².

Utafiti hauthibitishi nini?

• Haithibitishi kwamba ZnS/Ti₃C₂T_x separator inaweza kuzalishwa kwa commercial scale.
• Haionyeshi kwamba result ya cycles 1000 itajirudia kwa njia ileile katika cells zote.
• Haithibitishi kwamba composite itatoa result ileile katika pouch, prismatic au multilayer large cells.
• Haitatui lithium-metal negative-electrode safety na dendrite formation.
• Haithibitishi long-term mechanical durability ya separator coating kwa standardized tests.
• Haionyeshi kwamba performance ileile itahifadhiwa electrolyte amount ikipunguzwa.
• Haikokotoi full-cell gravimetric au volumetric energy density.
• Haichunguzi cost, environmental impact au mass-production yield ya ZnS na MXene production.
• Results za utafiti hazijathibitishwa na peer review.

Ina maana gani kwa battery research nchini Uturuki?

Utafiti si maalum kwa nchi au region fulani. Polysulfide shuttle effect na slow sulfur conversion katika lithium-sulfur batteries ni general materials-science problems.

Ili approach sawa itathminiwe nchini Uturuki, yafuatayo yanahitajika:

• Kuchunguza local scalability ya MXene na ZnS production,
• Kurekebisha coating kwa roll-to-roll separator manufacturing,
• Kukokotoa athari ya coating thickness na mass kwenye energy density,
• Kufanya tests kwa low electrolyte/sulfur ratios,
• Kupima higher areal capacities,
• Statistical validation kwa independent cells nyingi,
• Safety na swelling tests katika pouch-type cells,
• Kuchunguza side reactions kwenye lithium-metal surface,
• Material recovery na life-cycle assessment.

Laboratory values katika utafiti hazipaswi kutafsiriwa moja kwa moja kama commercial battery performance kabla ya hatua hizi za ziada kukamilika.

Mbinu na Matokeo ya Utafiti

Technical summary ya material production

Material characterization

Electrochemical methods

Main performance results

Nguvu za utafiti

• Material design, structural characterization na full-cell experiments zimeunganishwa katika utafiti mmoja.
• ZnS imechunguzwa si kama catalyst pekee, bali pia kama structural spacer.
• Polysulfide adsorption imetathminiwa pamoja kwa visual experiment, UV–vis na XPS.
• Reduction na oxidation directions zimepimwa tofauti kwa PITT.
• Activation na concentration polarizations zimetenganishwa.
• Conversion ya intermediates imefuatiliwa kwa muda kwa in situ Raman analysis.
• Conditions tofauti kama rate performance, cycles 200, high sulfur loading na cycles 1000 zimetathminiwa.
• Utafiti una funding na conflict-of-interest statements.

Mapungufu makuu ya utafiti

• Utafiti haujapitia peer review.
• Uploaded text haina separate na detailed experimental-method section.
• Supplementary Figures S1–S14 zinazorejelewa hazijajumuishwa katika uploaded study file.
• Amounts za ZnS precursors na exact ZnS ratio katika composite hazipo.
• Separator-coating thickness na mass per unit area hazijaripotiwa.
• Composition ya sulfur cathode na binder ratios hazijatolewa.
• Electrolyte composition na electrolyte/sulfur ratio hazijaelezwa.
• Lithium-foil thickness na negative/positive capacity ratio hazijatolewa.
• Details kama cell type na assembly pressure hazijaelezwa.
• Independent-cell replicate numbers hazijaripotiwa.
• Cycling graphs hazina standard deviation au confidence interval.
• Parameters zote za activation-energy na diffusion-coefficient calculations hazijatolewa.
• Long-term mechanical integrity ya coating haijapimwa quantitatively.
• High-sulfur-loading experiment iliendelea kwa cycles 50 pekee.
• Pouch-type au larger-cell validation haijafanywa.
• Hakuna open-access link ya raw data, analysis code na full experimental recipe.

Tatizo muhimu la reporting katika text na figures

Katika caption ya Kielelezo 6, cycling conditions zimechanganywa. Kulingana na main text na graph labels:

• Kielelezo 6c kinaonyesha, katika 0,1 C, experiment ya cycles 200,
• Kielelezo 6g kinaonyesha, katika 1 C, experiment ya cycles 1000.

Figure caption imeandika rates hizi mbili kinyume. Katika makala, common indication ya main text, abstract na labels ndani ya graphs ndiyo imetumika.

Additional studies zitakazoimarisha results

• Kuchapisha full experimental method na supplementary information,
• Kupima angalau several independent cells katika kila condition,
• Kuripoti mean, standard deviation na confidence intervals,
• Kufanya experiments katika low electrolyte/sulfur ratio,
• Kutumia cathodes zenye higher areal capacity,
• Kukokotoa effect ya coating mass kwenye full-cell energy density,
• Scale-up kwa pouch-type cells,
• Kuchunguza lithium-metal surface baada ya cycling,
• Coating-peeling na puncture-resistance tests,
• Long-term high-sulfur-loading cycling,
• Parametric optimization ya ZnS ratio na nanoparticle size,
• Kushiriki raw data na manufacturing recipe katika open repository.

Maelezo ya Chanzo na Mbinu

• Jina asili la utafiti: In Situ Grown ZnS Nanoparticles on Ti3C2Tx MXene as Dual-Functional Spacers for Boosted Sulfur Redox Kinetics in Lithium-Sulfur Batteries
• Waandishi: QiuHong Zhang; XingYu Liu; JingYue Gao; Xu Yang; YuFei Zhang; Yang Zhao; Qi Jin
• Mpangilio wa waandishi: Waandishi wametolewa hapo juu kwa mpangilio asili wa title page.
• Equal contribution au equal first authorship: Hakuna statement.
• Waandishi wa mawasiliano: YuFei Zhang; Yang Zhao; Qi Jin
• Barua pepe ya YuFei Zhang: zhangyufei230103@163.com
• Barua pepe ya Yang Zhao: zhaoyang032016@163.com
• Barua pepe ya Qi Jin: jinqi@hrbnu.edu.cn
• Taasisi ya kwanza: Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education; School of Physics and Electronic Engineering, Harbin Normal University, Harbin, China
• Taasisi ya pili: College of Science, Qiqihar University, Qiqihar, China
• Institution mapping: Yang Zhao ameunganishwa na Qiqihar University kwenye title page; waandishi wengine wameunganishwa na Harbin Normal University.
• Mwaka wa utafiti: 2026
• Exact upload date: Haijatajwa katika uploaded study text.
• Aina ya chanzo: Experimental preprint research text ambayo haijapitia peer review
• Jukwaa la uchapishaji: SSRN
• Platform operator: Elsevier
• Preprint DOI: 10.2139/ssrn.7196302
• Rekodi rasmi:Ukurasa rasmi wa utafiti wa SSRN
• Permanent DOI link:10.2139/ssrn.7196302
• Jarida: Haijathibitishwa kwamba imechapishwa katika peer-reviewed journal.
• Mchapishaji asilia: Hakuna peer-reviewed journal publisher; utafiti umewasilishwa kwenye SSRN preprint platform.
• Hali ya mapitio ya kitaalamu: Kila ukurasa wa utafiti unaeleza kwamba haujapitia peer review.
• Ufadhili: National Natural Science Foundation of China, 22409044; Natural Science Foundation of Heilongjiang Province, LH2023E079
• Mgongano wa maslahi: Waandishi wametangaza kwamba hakuna known financial conflict of interest au personal relationship inayoweza kuathiri utafiti.
• Data access: Hakuna open-data-repository link iliyotolewa kwa raw data.
• Supplementary material: Main text inarejelea Supplementary Figures S1–S14, lakini supplements hizi hazipo katika uploaded file.

Michango ya CRediT: QiuHong Zhang; first draft, data curation, research na formal analysis. XingYu Liu; data curation na research. JingYue Gao; research na formal analysis. Xu Yang; data curation na formal analysis. YuFei Zhang; review na editing, resources, data curation na supervision. Yang Zhao; review na editing, funding acquisition na formal analysis. Qi Jin; review na editing, methodology, funding acquisition, research, conceptualization na data curation.

Scientific content ya makala hii ya Verianla imeandaliwa kwa kutegemea tu main text ya uploaded study, structural analyses, adsorption experiments, XPS measurements, electrochemical data, in situ Raman results na graphs katika Figures 1–6. External sources zilitumika tu kwa bibliographic verification ya DOI, SSRN record, author na institution information; hakuna new scientific finding kutoka external sources iliyoongezwa.

Kwa kuwa sehemu muhimu ya experimental-method details na supplementary information yote haipo katika utafiti, synthesis, separator coating na cell assembly haviwezi kurudiwa independently kwa njia ileile. Upungufu huu haumaanishi kwamba results ni wrong; lakini unapunguza verifiability ya numerical performance na transferability yake kwenda laboratories nyingine.

Kwamba experiment ya cycles 200 ilifanywa katika 0,1 C na experiment ya cycles 1000 katika 1 C kunaungwa mkono na main text, abstract na labels ndani ya graphs. Reversed rate statements katika caption ya Kielelezo 6 hazijasahihishwa kimya kimya na zimeelezwa wazi katika source note hii.