(Lithium bir anode) wejiga dhexda ee elektrolytka adag ee anion-ka helay

Solid Electrolyte Interphase (SEI) ayaa si weyn loogu isticmaalaa in lagu qeexo wejiga cusub ee u dhexeeya anode iyo electrolyte ee baytariyada shaqada. Cufnaanta tamarta sare ee lithium (Li) baytariyada birta ayaa si ba'an u carqaladeeyay kaydinta lithium dendritic oo ay hagto SEI aan labis ahayn. Inkasta oo ay leedahay faa'iidooyin gaar ah oo lagu hagaajinayo isku-dhafka lithium-ku-dhigista, codsiyada la taaban karo, saameynta SEI-ka-soo-baxa ah maaha mid ku habboon. Dhawaan, kooxda cilmi-baarista ee Zhang Qiang ee ka socota Jaamacadda Tsinghua ayaa soo jeediyay in la isticmaalo reseptors anion si ay u hagaajiyaan qaab-dhismeedka elektrolytka si loo dhiso SEI deggan oo ka soo jeeda anion. Tris (pentafluorophenyl) borane anion reseptor (TPFPB) oo leh atomamka boron-ka-yar ee elektarooniga ah waxay la falgalaan bis (fluorosulfonimide) anion (FSI-) si loo yareeyo xasilloonida FSI-. Intaa waxaa dheer, joogitaanka TFPPB, nooca clusters ion (AGG) ee FSI- ee elektrolytka ayaa isbeddelay, FSI- waxay la falgashaa Li+ badan. Sidaa darteed, kala-goynta FSI- ayaa kor loogu qaadayaa soo saarista Li2S, iyo xasilloonida SEI-ka-soo-baxa ah ayaa la wanaajiyey.

SEI waxa uu ka kooban yahay alaabada kala goysa ee korantada. Halabuurka iyo qaab-dhismeedka SEI waxaa inta badan gacanta ku haya qaab-dhismeedka elektrolytka, taas oo ah, isdhexgalka microscopic ee u dhexeeya dareeraha, anion, iyo Li +. Qaab dhismeedka elektrolytka ma beddelo oo keliya nooca dareeraha iyo milixda lithium, laakiin sidoo kale xoojinta milixda. Sanadihii la soo dhaafay, koronto-ururinta-sare (HCE) iyo korantada-fiirsashada sare ee deegaanka (LHCE) waxay muujiyeen faa'iidooyin gaar ah oo lagu xasilinayo birta lithium-ka iyadoo la samaynayo SEI deggan. Saamiga molarka ee dareeraha iyo milixda lithium waa uu hooseeyaa (in ka yar 2) iyo anions waxaa lagu dhex geliyaa galka xalinta koowaad ee Li+, samaynta lamaanaha xidhiidhka (CIP) iyo iskudarka (AGG) ee HCE ama LHCE. Halabuurka SEI waxaa markaa ka dib nidaamiya anions ee HCE iyo LHCE, kaas oo loo yaqaan SEI-ka-soo-baxa. In kasta oo ay wax qabadkeeda soo jiidashada leh ee xasilinta birta birta lithium, SEI-da laga keenay anion hadda kuma filna in ay la kulanto caqabadaha xaaladaha la taaban karo. Sidaa darteed, waa lagama maarmaan in la sii wanaajiyo xasilloonida iyo isku-duubnaanta SEI-ka-soo-baxa si looga gudbo caqabadaha xaaladaha dhabta ah.

Anions ee qaabka CIP iyo AGG ayaa ah horu-yaasha ugu muhiimsan ee SEI-ga anion-ka-soo-jeeda. Guud ahaan, qaabka elektrolytka ee anions waxaa si dadban u habeeya Li +, sababtoo ah kharashka togan ee dareeraha iyo molecules-ka dareeraha ah waa mid daciif ah oo aan si toos ah ula macaamili karin anions. Sidaa darteed, xeelado cusub oo lagu xakameynayo qaab dhismeedka elektrolytka anionic iyadoo si toos ah ula falgasha anions ayaa aad loo filayaa.