1. I-flame retardant ye-electrolyte
Ama-Electrolyte flame retardants ayindlela ephumelela kakhulu yokunciphisa ubungozi bokubaleka kokushisa kwamabhethri, kodwa lezi zinciphisi zomlilo zivame ukuba nomthelela omkhulu ekusebenzeni kwe-electrochemical yamabhethri e-lithium ion, ngakho-ke kunzima ukuwasebenzisa ekusebenzeni.Ukuze kuxazululwe le nkinga, enyuvesi yaseCalifornia, eSan Diego, ithimba le-YuQiao [1] ngendlela yokupakisha i-capsule izovutha i-DbA (dibenzyl amine) egcinwe ngaphakathi kwe-capsule encane, ehlakazekile ku-electrolyte, izikhathi ezijwayelekile ngeke zibe nomthelela ekusebenzeni kwamabhethri e-lithium ion avele, kodwa lapho amaseli ekubhujisweni amandla angaphandle njenge-extrusion, ama-flame retardants kulawa ma-capsules ayakhululwa, afake ubuthi ebhethri futhi abangele ukuthi ihluleke, ngaleyo ndlela ixwayise. ekubalekeni okushisayo.Ngo-2018, ithimba lika-YuQiao [2] liphinde lasebenzisa ubuchwepheshe obungenhla, lisebenzisa i-ethylene glycol ne-ethylenediamine njengezinqamuli zomlilo, ezagqunywa futhi zafakwa ebhethrini le-lithium ion, okuholele ekwehleni okungama-70% kwezinga lokushisa eliphezulu lebhethri ye-lithium ion ngesikhathi. ukuhlolwa kwephinikhodi, kunciphisa kakhulu ingozi yokulawula okushisayo kwebhethri ye-lithium ion.
Izindlela ezishiwo ngenhla ziwukuzibhubhisa, okusho ukuthi uma isinqamuleli somlilo sesisetshenzisiwe, ibhethri yonke ye-lithium-ion izobhujiswa.Kodwa-ke, ithimba lika-AtsuoYamada enyuvesi yaseTokyo eJapan [3] lakha i-electrolyte ebambezela ilangabi engeke iphazamise ukusebenza kwamabhethri e-lithium-ion.Kule electrolyte, ukuhlushwa okuphezulu kwe-NaN(SO2F)2(NaFSA) nomaLiN(SO2F)2(LiFSA) kwasetshenziswa njengosawoti we-lithium, futhi i-trimethyl phosphate TMP e-flame retardant evamile yengezwa ku-electrolyte, okwathuthukisa kakhulu ukuzinza okushisayo. ibhethri ye-lithium ion.Ngaphezu kwalokho, ukungezwa kwe-flame retardant akuzange kuthinte ukusebenza komjikelezo webhethri ye-lithium ion.I-electrolyte ingasetshenziselwa imijikelezo engaphezu kuka-1000 (imijikelezo engu-1200 C/5, ukugcinwa kwamandla angu-95%).
Izici ezibambezela ilangabi zamabhethri e-lithium ion ngokusebenzisa izithasiselo kungenye yezindlela zokuxwayisa amabhethri e-lithium ion ukuthi ashise angalawuleki.Abanye abantu futhi bathola indlela entsha yokuzama ukuxwayisa ukwenzeka kwesifunda esifushane kumabhethri e-lithium ion abangelwa amandla angaphandle avela empandeni, ukuze kuzuzwe inhloso yokususa phansi futhi kuqede ngokuphelele ukuvela kokushisa ngaphandle kokulawula.Ngenxa yomthelela wodlame ongase ube nawo wamabhethri e-lithium ion asetshenziswayo, u-GabrielM.Veith ovela e-Oak Ridge National Laboratory e-United States uklame i-electrolyte enezici zokujiya i-shear [4].Le electrolyte isebenzisa izakhiwo zamanzi angewona ama-Newtonian.Esimweni esijwayelekile, i-electrolyte iyi-liquid.Kodwa-ke, lapho ibhekene nomthelela ongazelelwe, izokwethula isimo esiqinile, ibe namandla ngokwedlulele, futhi ingafinyelela umphumela wokuvikela inhlamvu.Kusuka empandeni, ixwayisa ngengozi yokubaleka okushisayo okubangelwa ukujikeleza okufushane kubhethri lapho amandla e-lithium ion eshayisa ibhethri.
2. Isakhiwo sebhethri
Okulandelayo, ake sibheke indlela yokubeka amabhuleki ekubalekeni okushisayo ukusuka ezingeni lamaseli ebhethri.Njengamanje, inkinga yokubaleka okushisayo iye yacatshangelwa ekwakhiweni kwesakhiwo samabhethri e-lithium ion.Isibonelo, kuvame ukuba nevalvu yokukhulula ingcindezi kukhava ephezulu yebhethri engu-18650, engakhulula ngesikhathi ukucindezela okukhulu ngaphakathi kwebhethri lapho ukushisa okushisayo.Okwesibili, kuzoba khona i-coefficient yokushisa ephozithivu impahla ye-PTC kukhava yebhethri.Lapho izinga lokushisa elishisayo likhuphuka, ukumelana kwempahla ye-PTC kuzokhula kakhulu ukunciphisa okwamanje nokunciphisa isizukulwane sokushisa.Ngaphezu kwalokho, ekwakhiweni kwesakhiwo sebhethri elilodwa kufanele futhi kubhekwe ukwakheka kwe-anti-short-circuit phakathi kwezigxobo ezinhle nezingezinhle, ukuqapha ngenxa yokungasebenzi kahle, izinsalela zensimbi nezinye izici eziholela kumjikelezo omfushane webhethri, okubangela izingozi zokuphepha.
Lapho idizayini yesibili kumabhethri, kufanele isebenzise i-diaphragm evikeleke kakhulu, njengembotshana evaliwe enezingqimba ezintathu ezingeni lokushisa eliphezulu i-diaphragm, kodwa eminyakeni yamuva nje, ngokuthuthukiswa kwamandla ebhethri, i-diaphragm encane ngaphansi komkhuba we-diaphragm. I-diaphragm enezingqimba ezintathu kancane kancane isiphelelwe yisikhathi, yathathelwa indawo yi-ceramic coating ye-diaphragm, i-ceramic coating ezinjongweni zokusekela i-diaphragm, ukunciphisa ukufinyela kwe-diaphragm emazingeni okushisa aphezulu, Thuthukisa ukuqina okushisayo kwebhethri ye-lithium ion futhi unciphise ingozi ukugijima okushisayo kwebhethri ye-lithium ion.
3. Idizayini yephakethe yebhethri yezokuphepha ezishisayo
Lapho esetshenziswa, amabhethri e-lithium ion avame ukwakhiwa ngamashumi, amakhulu noma izinkulungwane zamabhethri ngochungechunge nokuxhumeka okufanayo.Isibonelo, iphakethe lebhethri le-Tesla ModelS liqukethe amabhethri angaphezu kuka-7,000 18650.Uma elinye lamabhethri lilahlekelwa isilawuli esishisayo, lingasakazeka kuphakethe lebhethri futhi kubangele imiphumela emibi.Ngokwesibonelo, ngo-January 2013, ibhethri yenkampani yaseJapane i-Boeing 787 lithium ion yasha eBoston, e-United States.Ngokophenyo lweNational Transportation Safety Board, ibhethri ye-lithium ion yesikwele engu-75Ah ephaketheni lebhethri libangele ukushabalala kwamabhethri aseduze.Ngemuva kwalesi sigameko, i-Boeing yadinga ukuthi wonke amaphakethe ebhethri afakwe izindlela ezintsha zokuvimbela ukusabalala kokushisa okungalawuleki.
Ukuze kuvinjwe ukubaleka okushisayo ukuthi kungasakazeki ngaphakathi kwamabhethri e-lithium ion, i-AllcellTechnology ithuthukise i-PCC yokuhlukanisa izinto ezishisayo namabhethri e-lithium ion asekelwe ezintweni zokushintsha isigaba [5].Izinto ze-PCC ezigcwaliswe phakathi kwebhethri le-lithium ion le-monomer, esimweni somsebenzi ojwayelekile wephakethe lebhethri le-lithium ion, iphakethe lebhethri ekushiseni lingadluliswa ngezinto ze-PCC ngokushesha liye ngaphandle kwephakethe lebhethri, lapho ukushisa okushisayo ku-lithium ion Amabhethri, into ye-PCC ngokuncibilika kwayo upharafini wangaphakathi imunca ukushisa okukhulu, ivimbele izinga lokushisa lebhethri liqhubeke likhuphuka, Ngakho-ke qaphela ukushisa okungalawuleki ephaketheni lebhethri elisakazwa ngaphakathi.Ekuhlolweni kwe-pinprick, ukubaleka okushisayo kwebhethri elilodwa kuphakethe lebhethri elihlanganisa izintambo ezingu-4 nezingu-10 zamaphakethe ebhethri angu-18650 ngaphandle kokusebenzisa impahla ye-PCC kugcine kubangele ukubaleka okushisayo kwamabhethri angu-20 ephaketheni lebhethri, kuyilapho ukubaleka okushisayo kwelinye. ibhethri ephaketheni lebhethri elenziwe ngezinto ze-PCC alizange libangele ukushabalala kwamanye amaphakethe ebhethri.
Isikhathi sokuthumela: Feb-25-2022