Uzilungiselela njani iibhetri ze-lithium ion zobushushu obuphantsi kakhulu ezinokusebenza ngokuqhelekileyo kwi-minus 60°C?

Kutshanje, uDing Jianning weYunivesithi yaseJiangsu kunye nabanye baye basebenzisa i-lithium iron phosphate egqunywe i-mesoporous carbon njengesixhobo se-electrode esilungileyo kunye ne-hard carbon material etyebileyo kwisakhiwo se-mesoporous esilungiselelwe iteknoloji ye-electrospinning njengento engafanelekanga ye-electrode. I-Lithium bistrifluoromethanesulfonimide LiTFSi ityuwa kunye ne-electrolyte ye-DIOX (1,3-dioxane) + EC (ethylene carbonate) + i-VC (vinylidene carbonate) i-solvents ihlanganiswe kwibhetri ye-lithium-ion. Izinto zebhetri yento eqanjiweyo zineempawu ezibalaseleyo zokuhanjiswa kwe-ion kunye neempawu zokuchithwa ngokukhawuleza kwe-lithium ion, kunye ne-electrolyte ephantsi yobushushu obugcina ukusebenza kakuhle kumaqondo obushushu aphantsi, ukuqinisekisa ukuba ibhetri isenokusebenza ngokuqhelekileyo kwi-minus 60 °. C.

Njengeyona teknoloji ikhula ngokukhawuleza kwishishini lebhetri, uluntu lwamkela ngokubanzi iibhetri ze-lithium-ion kumbane wabo ophezulu osebenzayo, ubuninzi bamandla aphezulu, ubomi bomjikelezo omde, ukuzikhupha okuphantsi, akukho siphumo sememori, kunye nokukhusela "okuluhlaza" kokusingqongileyo. Ishishini likwatyale imali eninzi kuphando. Kukho uphando oluninzi malunga ne-lithium ion ezinokuziqhelanisa nobushushu obuphantsi kakhulu. Nangona kunjalo, phantsi kweendawo eziphantsi kweqondo lokushisa, i-viscosity ye-electrolyte iya kwanda ngokukhawuleza, kwaye iya kwandisa ukuhamba kweebhetri ze-lithium-ion phakathi kwezinto ze-electrode. Ukongezelela, i-electrolyte iya kuba yinto enhle kumaqondo aphantsi. Umaleko we-SEI owenziwe kwi-electrode engalunganga iya kutshintsha inqanaba kwaye ingazinzi ngakumbi. Ke ngoko, izixhobo ze-electrode ezintle nezingalunganga kuyilo lwangoku zibonelela ngokuzinza ngakumbi kokusingqongileyo kwe-SEI, umgama omfutshane wokuhambisa, kunye ne-electrolyte ene-viscosity esezantsi kumaqondo obushushu aphantsi, ukuqonda ibhetri ye-lithium esenokusebenza kwiqondo lobushushu eliphantsi kakhulu. ngaphantsi kwama-60°C. . Ingxaki yobuchwephesha ekufuneka isonjululwe ngokuqanjwa kukunqoba umda wokusetyenziswa kwezinto zebhetri ze-lithium kwiindawo eziphantsi kweqondo lokushisa kunye nengxaki ye-viscosity ephezulu ye-electrolyte eqhelekileyo kwiqondo lokushisa eliphantsi kunye nokuhamba kwe-ion ephantsi, kunye nokubonelela ngokushaja okuphezulu. Ibhetri ye-lithium-ion kunye nendlela yokuyilungisa isebenzisa ibhetri ye-lithium-ion ukufezekisa intlawulo egqwesileyo kunye nokukhupha ukusebenza kumaqondo obushushu aphantsi.

Umzobo 1 Ukuthelekisa ukusebenza kwe-electrochemical of iibhetri ze-lithium-ion ezinobushushu obuphantsi kwiqondo lokushisa kunye neqondo eliphantsi.

Impembelelo enenzuzo yokuveliswa kukuba xa izinto ezinobungozi ze-electrode zisetyenziswa njengephepha le-electrode, akukho binder efunekayo. Ayiyi kunciphisa i-conductivity, kwaye iya kwandisa izinga lokusebenza.

Isiqhoboshelo: ulwazi lwelungelo elilodwa lomenzi wechiza

Igama lePatent: Indlela yokulungiselela ibhetri ye-lithium-ion yobushushu obuphantsi kakhulu obunokusebenza kuthatho lwe-60°C

Inombolo yopapasho lwesicelo CN 109980195 A

Umhla wokubhengezwa kwesicelo 2019.07.05

Inombolo yesicelo 201910179588 .4

Umhla wokufaka isicelo 2019.03.11

Umfaki-sicelo kwiYunivesithi yaseJiangsu

Umqambi uDing Jianning Xu Jiang Yuan Ningyi Cheng Guanggui