Ithimba labacwaningi lika-Li Mingtao elivela eSikoleni Sobunjiniyela Bamakhemikhali sase-Xi’an Jiaotong University lenze intuthuko ekusetshenzisweni kwamabhethri e-lithium-sulphur ngokuklama nokuthuthukisa impahla ye-cathode enongqimba oluvikelayo lwe-graphene olunezinhlangothi ezimbili. Le nto ye-cathode inempilo yomjikelezo omude.

I-2d intercalation G-C3N4/graphene sandwich yakha inethi yoshaka eminingi phakathi kwama-electrode aphozithivu noma anegethivu ebhethri. Ayikwazi ukuvimba kuphela ukunyakaza kwama-polysulfides phakathi kwama-electrode amahle noma angalungile ngokusebenzisa ukusetshenziswa ngokomzimba namakhemikhali, kodwa futhi isheshise ukusabalalisa kwe-lithium ion, ngaleyo ndlela ikhulise kakhulu impilo yomjikelezo webhethri.

Ezweni lami, ukuthuthukiswa kwamabhethri e-lithium-sulfur sekuphuzile, futhi kusesesigabeni sokucwaninga nokuthuthukiswa kwelabhorethri, kunezinhlelo zokusebenza ezimbalwa ezisebenzayo. Umphumela we-shuttle obangelwa ukuhlakazwa komkhiqizo omaphakathi we-lithium sulfide phakathi nenqubo yokushaja nokukhipha amabhethri e-lithium sulfur uthathwa njengento eyinhloko ekhawulela ukusetshenziswa kwawo okungokoqobo.

Owayeyiphini likamongameli we-Qinghai uDkt. Li Technician Technology wake wathi i-polysulfide encibilikisiwe i-space shuttle iyinkinga yebhethri ye-lithium-sulphur ebaluleke kakhulu futhi enzima, futhi umsebenzi wokuthuthukisa okuhlobene usesesigabeni sokuqala, kodwa unethemba lokuthi i-lithium-sulphur amabhethri angasetshenziswa njengamabhethri esibili. Ngobuningi bamandla amakhulu, inamathemba okuthuthuka abanzi.

Uma kuqhathaniswa ne-NCM evamile ye-ternary yamanje, amandla athiyori athile ebhethri le-sulphur cathode aphezulu njengokungu-2600Wh/kg, okuphindwe izikhathi ezingaphezu kweshumi kwebhethri ye-lithium esetshenziswa kabanzi njengamanje. Ngaphezu kwalokho, izindawo zokugcina zesulfure ziningi futhi azibizi, ezingasiza ukunciphisa intengo yezimoto zikagesi ezinikezwa amandla amabhethri e-lithium.

Ngo-2016, Ikhomishana Kazwelonke Yokuthuthukiswa Nezinguquko ihlongoze impumelelo kubuchwepheshe bebhethri ye-lithium-sulphur ene-energy density ye-300Wh/kg ku-“Energy Technology Revolution and Innovation Action Plan (2016-2030)”.

Ngokuphambene, ngokwezinyathelo Zokugqugquzela Ukuthuthukiswa Kwemboni Yamandla Ezimoto kanye Nohlelo Lokuthuthukiswa Kwesikhathi Esimaphakathi Neside Lwemboni Yezimoto olukhishwe ngo-2017, isilinganiso somshini owodwa singafinyelela ngaphezu kuka-300Wh/kg ngo-2020, futhi isilinganiso somshini owodwa singafinyelela ku-500Wh ngo-2025./kg ngaphezulu. Ukuminyana kwamandla okucatshangwayo kwamabhethri e-lithium-sulphur kukhulu kuno-500Wh/kg, ngakho-ke kuthathwa njengokuqondiswa kokuthuthukiswa kwesizukulwane esilandelayo samandla wesistimu yebhethri ye-lithium ngemva kwamabhethri e-lithium.

Ukuze kuxazululwe izinkinga ezingokoqobo ekusetshenzisweni kwamabhethri e-lithium-sulphur, okuhlanganisa ithimba le-Qian Hanlin le-University of Science and Technology of China, ithimba le-Wang Haihui laseNingizimu China University of Technology, i-Qingdao Energy and Energy Storage Materials Advanced Ithimba Labacwaningi Bezobuchwepheshe le-Chinese Academy of Sciences, ithimba lethu le-Xiamen University Chemical Chemical Nan Fengzheng kanye nethimba labacwaningi base-Shanghai Jiaotong University Wang benze inqubekelaphambili eyimpumelelo.

Ngo-Okthoba 2018, uSolwazi Wang, Yitaiqian kanye neNyuvesi Yesayensi Nobuchwepheshe ehlukahlukene yaseChina (iNyuvesi Yesayensi Nobuchwepheshe) bathola ukuthi ukusebenza okunamandla kwesikhungo se-p-band sama-electron e-valence ahlobene nezinga le-Fermi kuyisici esibalulekile ku-li. -S amabhethri Isixhumi esibonakalayo sokudlulisa ama-electron. Abacwaningi bathola ukuthi izinto ezithwala isulfure ezisekelwe ku-cobalt ezine-polarization encane kunazo zonke kanye nokusebenza kwesilinganiso esihle kakhulu kunomthamo we-417.3 Mahg-1 ngisho naku-40.0 ° C, ohambisana namandla amanje aphezulu kakhulu we-137.3 kwkg-1. Imiphumela yocwaningo yanyatheliswa ku-“Joule”, ijenali yamazwe ngamazwe yezinto ezinhle kakhulu zamandla.

Ibhethri ye-lithium-sulphur iyisistimu yebhethri ye-lithium yensimbi enesulfure njenge-electrode ephozithivu. Ukuze kuxazululwe inkinga yokuphepha yama-Li dendrites akhiqizwa ku-electrode eyinsimbi e-Shanghai Jiaotong University, ithimba lika-Wang lalungiselela uhlobo olusha lwesixazululo se-lithium yebhethri ye-electrolyte (esebenzisa i-Lithium fluorosulfonimide ephindwe kabili incibilika ku-triethyl phosphate kanye ne-flash point fluoroether ukuthola i-electrolyte egcwele) . Uma kuqhathaniswa ne-electrolyte ephezulu yokugxila, i-electrolyte entsha inezindleko eziphansi kanye ne-viscosity ephansi, ithuthukisa ukuvikelwa kwe-metal Li electrode, ingakwazi ukususa ngokuphumelelayo ama-dendrites e-electrode ye-Li, futhi iqede izingozi ezingase zibe khona zokuphepha. Ngesikhathi esifanayo, ukuphepha nokusebenza kwe-electrochemical kuyathuthukiswa ngaphansi kwezimo zokushisa eziphezulu ezingaphezu kuka-60 ° C.

Ngaphezu kocwaningo lwesayensi, izinkampani zebhethri zisebenzisa amabhethri e-lithium-sulphur njengenye yezindawo ezigcina imali zobuchwepheshe, zifuna ngenkuthalo impumelelo yezobuchwepheshe. Kulezi zinkampani ezisohlwini, iChina Nuclear Titanium Dioxide, iTibet Urban Investment, iJinlu Group, iGuoxun High-tech, iDream Vision Technology nezinye izinkampani zikhiphe amaphrojekthi ebhethri le-lithium-sulphur.

Nakuba amabhethri e-lithium-sulphur anezinkinga ezithile ohlelweni lokuthola ukuminyana kwamandla okufanelekile, kunezidingo eziphakeme zokuzaca kwezinye izinhlelo zebhethri, njengezimoto zasemoyeni ezingenamuntu (UAV), imikhumbi-ngwenya, nezikhwama ezithwala amasosha. Ukunikezwa kwamandla kwezinye izinjongo, njengoba isisindo sibaluleke kakhulu kunentengo noma impilo, amabhethri e-lithium-sulfur aseqalile ukusetshenziswa. Ibhethri elisha le-lithium-sulphur elakhiwe inkampani yaseBrithani yokuqala i-Oxis Energy ingagcina cishe amandla aphindwe kabili ngekhilogremu yamabhethri e-lithium okwamanje asetshenziswa ezimotweni zikagesi. Kodwa-ke, azikwazi ukuhlala isikhathi eside futhi zizohluleka ngemuva kwemijikelezo yokukhipha imali eyi-100. Umgomo wesikhungo esincane sokuhlola i-Oxis ukukhiqiza amabhethri angu-10,000 kuya kwangu-20,000 ngonyaka. Kuthiwa i-battery ifakwe esikhwameni esincane esilingana neselula. Kungani sidinga ukukhuthaza ukuvuselelwa kanye nokugaywa kabusha kwamandla amabhethri e-lithium ngokushesha ngangokunokwenzeka? Nakuba izinsiza ze-lithium zezwe lami zikleliswe endaweni yesine emhlabeni, ngenxa yezinga eliphansi le-lithium ore, ubunzima bokuhlanzwa, nezindleko eziphezulu, inani elikhulu le-lithium ore lingeniswa minyaka yonke, futhi izinga lokuthembela kwamanye amazwe lidlula i-85% . Ngaphezu kwalokho, ukufunwa kwamaShayina kuphinde kwanyusa intengo ye-lithium carbonate ebangeni lebhethri lenyuka. Eminyakeni yamuva, intengo ikhuphuke cishe izikhathi ezintathu, eye yanda kakhulu izindleko zokuthengwa kwabakhiqizi bebhethri baseShayina be-lithium. Ngakolunye uhlangothi, ukuqedwa kwamandla amabhethri e-lithium “imayini yasemadolobheni” eyigugu. Okuqukethwe kwensimbi kuphakeme kakhulu kune-ore, i-lithium, i-cobalt, i-nickel nezinye izinsimbi eziyigugu. Ukugaywa kabusha nokugaywa kabusha kungathuthukisa ukusebenza kahle kokusetshenziswa kwezinsiza, kunciphise ukungenisa, futhi kunciphise okwangaphandle Kwencika futhi kuvikele ukuphepha kwesu lemithombo yezwe. UZhang Tianren uthe, ngakolunye uhlangothi, ngokombono wokuvimbela ukungcola nokuvikela imvelo, uma amabhethri e-lithium alahliwe engalahlwa ngendlela efanele, azophinde abangele umonakalo omkhulu endaweni ezungezile.

Ukuze kuthuthukiswe kangcono ukutholwa kanye nokusetshenziswa kabusha kwamabhethri e-lithium ezimotweni ezintsha zamandla, ukuvikela indawo ezungezile, kanye nokuqinisekisa ukuphepha kwezinsiza zamasu kazwelonke, kunezindaba ezintathu ezibalulekile: uhlelo olungaphelele lokugaywa kabusha, ubuchwepheshe bokuvuselela kabusha obungavuthiwe, kanye nobuthaka. indlela yokukhuthaza. Izingxenye ezimbalwa zenze iziphakamiso zokukhuthaza intuthuko enempilo nesimeme yemboni yezimoto ezintsha zamandla ezwe lami.

Ukusheshisa ukuthuthukiswa kwamazinga kanye namazinga okuphatha ahlanganisayo kuyisisekelo sokwenza umsebenzi ohlobene. Uphakamise ukuthi iminyango efanele isheshise ukwakhiwa kwamazinga okuphatha, amazinga obuchwepheshe kanye namazinga okuhlola okugaywa kabusha nokusetshenziswa kabusha kwamabhethri asesebenzile. Khuthaza izifunda ezinenzuzo yezimboni ukuthi zenze ukugadwa kwebhethri ye-lithium yamandla amasha, ukubuyisela kabusha, nezinhlelo zokugaywa kabusha nezindlela zokuqalisa, futhi ngokusebenzisa abashayeli bezindiza bokuqala, ukuhlola izindlela zokuqalisa zikazwelonke ezihambisana kakhulu namaqiniso embonini futhi ezisebenza kangcono.