Kungani ibhethri lingasebenzisi isikhwama senqwaba ngesikhathi lisetshenziswa noma isikhathi eside?

2022/04/08

Umbhali :Iflowpower -Umhlinzeki Wesiteshi Samandla Esiphathekayo

Kunezimo ezimbili ohlelweni lokukhokhiswa nokukhishwa: eyodwa. Ukushaja okweqile okubangelwa ukushajwa ngokweqile kungaholela ekutheni wonke ama-athomu e-lithium asendaweni ye-electrode ephozithivu afake okokusebenza kwe-electrode okunegethivu, okubangele ukugoqa kwegridi epholistiwe eqondile, okuphinde kube umthombo oqinile webhethri ye-lithium-ion. Phakathi nale nqubo, i-lithium ion ye-electrode engalungile iyanda, futhi ukuqoqwa ngokweqile kuvumela i-athomu ye-lithium ukuba icwebezeliswe, ukuze ibhethri liqhume.

ezimbili. Enqubweni yokuqala yokushaja nokukhipha ibhethri le-lithium-ion eliwuketshezi, i-electrode material isabela kusixhumi esibonakalayo sesigaba esiqinile-soketshezi ngesikhathi sokushajwa kokuqala kanye nokukhipha ibhethri ye-lithium ion enguketshezi, futhi yakha ungqimba lwe-passivation oluthintwa ubuso bezinto ze-electrode. Ifilimu ye-passivation layer eyakhiwe ingavimbela ngempumelelo ukudlula kwe-molecule ye-electrolyte, kodwa i-Li + ingashumeka ngokukhululekile futhi inqanyulwe ungqimba lwe-passivation, futhi inezici ze-electrolyte eqinile, ngakho-ke lolu ngqimba lwefilimu ye-passivation lubizwa ngokuthi luqinile. i-electrolyte interface mask.

(I-SolideElectrolyteinterface), ebizwa nge-SEI. Ifilimu ye-SEI izovikela izinto ezingalungile ze-electrode, ukuze ukwakheka kwezinto ezibonakalayo kungabi lula ukuwa, futhi impilo yomjikelezo wezinto ze-electrode zinganezelwa. Ifilimu ye-SEI ayiyona into eqhubekayo, kuzoba noshintsho oluncane kunqubo yokushaja nokukhipha, futhi kuyadingeka ukuguqula izinguquko kwezinye izinto eziphilayo.

Ngemuva kokuthi ibhethri selikhishwe ngokweqile, ifilimu ye-SEI yenzeka ngokuhlehliswa ukuze kuphuke iringi, futhi ukucekelwa phansi kwe-SEI kwempahla ye-electrode eyinegethivu kwenza ukuba impahla ye-electrode engeyinhle igoqe, ngaleyo ndlela yakhe into eyinqwaba.

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