Ukusebenza kwebhethri ye-lithium enezinga eliphansi lesimo esiqinile

Isimo esiqinileamabhethri e-lithium asezingeni eliphansibonisa ukusebenza okuphansi kwe-electrochemical emazingeni okushisa aphansi.Ukushaja kwebhethri ye-lithium-ion ngezinga lokushisa eliphansi kuzodala ukushisa ekuphenduleni kwamakhemikhali kwama-electrode aqondile noma angalungile, okuholela ekushiseni ngokweqile kwama-electrode.Ngenxa yokungaqini kwama-electrode aqondile noma angalungile emazingeni okushisa aphansi, kulula ukubangela ukusabela kwe-electrolyte ukukhiqiza amabhamuza omoya kanye nemvula ye-lithium, ngaleyo ndlela kucekele phansi ukusebenza kwe-electrochemical.Ngakho-ke, izinga lokushisa eliphansi liyinqubo engenakugwemeka ekugugeni kwebhethri.

Izinga lokushisa lokukhipha liphansi kakhulu

Ithempelesha yokushaja ibhethri ye-lithium-ion iphansi kakhulu ngezinga lokushisa eliphansi, okuzodala umonakalo kuma-electrode aqondile noma angalungile.Uma izinga lokushisa lokushaja ibhethri lingaphansi kwezinga lokushisa legumbi, i-electrode ephozithivu yebhethri iyasabela futhi ibola ngokushisa, futhi igesi nokushisa okukhiqizwayo kunqwabelana kugesi elakheke ku-electrode ephozithivu, okubangela ukwanda kweseli.Uma izinga lokushisa liphansi kakhulu ngesikhathi sokukhipha, izigxobo zizontengantenga.Ukuze ulondoloze umsebenzi we-electrode engalungile kanye ne-electrode enhle, ibhethri kufanele ishajwe ngokuqhubekayo, ngakho-ke, izinto ezisebenzayo ze-electrode esebenzayo kufanele zigcinwe endaweni ethile ngangokunokwenzeka lapho ishaja.

Ukuwohloka kwamandla

Umthamo webhethri ubola ngokushesha phakathi nezinga lokushisa eliphansi lokuhamba ngebhayisikili futhi linomthelela omkhulu empilweni yebhethri.Ukushaja okunezinga lokushisa eliphansi kuholela ekushintsheni kwevolumu ngokweqile kuma-electrode amahle futhi angalungile, okuholela ekwakhekeni kwe-lithium dendrites futhi ngaleyo ndlela kuthinte ukusebenza kwebhethri.Ukulahlekelwa amandla kanye nokuwohloka komthamo ngesikhathi somjikelezo wokushaja/wokukhipha kuphinde kube yisici esikhulu esithinta ukuphila kwebhethri, futhi ukubola kwe-LiCoSiO 2 cathode kanye ne-LiCoSiO 2 cathode emazingeni okushisa aphezulu kukhiqiza igesi namabhamuza kanye ne-electrolyte eqinile, ethinta ibhethri. impilo yebhethri.Ukusabela kwama-electrode aqondile noma angalungile ane-electrolyte ezingeni lokushisa eliphansi kukhiqiza amabhamuza akhubaza ama-electrode aphozithivu noma angalungile phakathi nomjikelezo webhethri, ngaleyo ndlela abangele ukuthi umthamo webhethri ubole ngokushesha.

Impilo yomjikelezo

Isandiso sempilo yomjikelezo sincike esimweni sokushajwa kwebhethri kanye nokugxila kwe-lithium ion ngesikhathi sokushaja.Ukugxiliswa kwe-lithium ion okuphezulu kuzovimbela ukusebenza kokuhamba ngebhayisikili, kuyilapho ukugxiliswa kwe-lithium ephansi kuzovimbela ukusebenza kokuhamba ngebhayisikili kwebhethri.Njengoba ukushaja ngezinga lokushisa eliphansi kuzobangela ukuthi i-electrolyte isabele ngobudlova, ngaleyo ndlela kuthinte ukusabela kwe-electrode enhle nengalungile, okuzobangela ukusebenzisana phakathi kwezinto ezisebenzayo ze-electrode positive nenegative ngaleyo ndlela kubangele ukuthi i-electrode engeyinhle isabele futhi ikhiqize inani elikhulu legesi futhi amanzi, ngaleyo ndlela andise ukushisa kwebhethri.Lapho ukuhlushwa kwe-lithium ion kungaphansi kuka-0.05%, impilo yomjikelezo izikhathi ezi-2 kuphela / ngosuku;lapho ukushaja kwamanje kwebhethri kungaphezu kuka-0.2 A/C, uhlelo lomjikelezo lungagcina izikhathi ezingu-8-10/ngosuku, kuyilapho lapho ukuhlushwa kwe-lithium dendrite kungaphansi kuka-0.05%, uhlelo lomjikelezo lungagcina izikhathi ezingu-6-7/ngosuku. .

Kwehliswe ukusebenza kwebhethri

Emazingeni okushisa aphansi, ukulahlekelwa kwamanzi kuzokwenzeka ku-electrode engalungile kanye ne-diaphragm yebhethri ye-Li-ion, okuzoholela ekwehleni kokusebenza komjikelezo kanye namandla okushaja ebhethri;i-polarization yezinto ezinhle ze-electrode izophinde ibangele ukuwohloka kwe-brittle kwempahla ye-electrode engalungile, okuholela ekungazinzi kwe-lattice kanye nesenzakalo sokudlulisa ukushaja;ukuhwamuka, ukuguquguquka, ukuncibilika, i-emulsification kanye nemvula ye-electrolyte nakho kuzoholela ekwehleni kokusebenza komjikelezo webhethri.Emabhethri e-LFP, into esebenzayo ebusweni bebhethri iyancipha kancane kancane njengoba inani lokushaja nokukhishwa landa, futhi ukunciphisa izinto ezisebenzayo kuzoholela ekunciphiseni umthamo webhethri;phakathi nenqubo yokushaja nokukhipha, njengoba inani lokushaja nokukhishwa likhula, izinto ezisebenzayo kusixhumi esibonakalayo ziphinde zihlangane zibe isakhiwo sebhethri esiqinile nesinokwethenjelwa, okwenza ibhethri liqine futhi liphephe.


Isikhathi sokuthumela: Nov-15-2022