(Lithium hlau Anode) theem kev sib txuam ntawm cov khoom ntiag tug tshiab-muab cov khoom siv hluav taws xob

Khoom siv hluav taws xob electrolyte (sei) yog dav siv los piav txog theem tshiab tsim ntawm anode thiab electrolyte hauv cov roj teeb ua haujlwm. Kev siv hluav taws xob siab ntev lithium (LI) cov roj teeb hlau yog qhov teeb meem hlau loj heev los ntawm cov tsis muaj kev sib tw ntawm SEI. Txawm hais tias nws muaj qhov zoo tshwj xeeb hauv kev txhim kho cov kev sib txawv ntawm Lithium Deposition, hauv cov ntawv thov kev siv, cov nyhuv ntawm anion-derived sei tsis zoo tagnrho. Tsis ntev los no, Zhang Qiang cov pab pawg tshawb fawb los ntawm Tsinghua University tau thov kom kho cov qauv electrolyte los tsim lub ruaj khov ion-derived sei. Lub Tris (Pentafluorophenyl) Bergane anion recion (TPFPB) nrog hluav taws xob atoms nrog cov kabmob BIS (Fluorosulfonimide) anion (FSI-) kom txo qis kev ruaj ntseg ntawm fsi-. Tsis tas li ntawd, nyob rau hauv lub xub ntiag ntawm TFPPB, hom ion clusters (Agg) ntawm FSI- hauv electrolyte tau hloov, thiab fsi- sib tham nrog ntau li +. Yog li ntawd, qhov decomposition ntawm FSI- tau txhawb nqa los tsim L2Ss, thiab qhov ruaj khov ntawm anion-tau txhim kho sei tau txhim kho.

SEI yog tsim los ntawm cov khoom lag luam decomposition ntawm electrolyte. Qhov muaj pes tsawg leeg thiab cov qauv ntawm SEI yog feem ntau tswj hwm los ntawm cov qauv ntawm electrolyte, uas yog, kev sib cuam tshuam ntawm kev sib cuam tshuam ntawm cov kuab tshuaj, anion, thiab li +. Cov qauv ntawm cov electrolyte pauv tsis tsuas yog nrog hom huab cua thiab lithium ntsev, tab sis kuj nrog cov ntsev. Nyob rau hauv xyoo tsis ntev los no, siab-siab electrolyte (HCE) thiab ib cheeb tsam zoo siab electrolyte (lhce) Tus nqi ntsuas hniav ntsuas ntawm cov kuab tshuaj rau lithium ntsev yog tsawg (tsawg dua 2) thiab actions ion khub (CIRG) hauv HCE lossis LHCE. Qhov muaj pes tsawg leeg ntawm SEI yog tom qab tau tswj hwm los ntawm Anions hauv HCE thiab LHCE, uas yog hu ua anion-derived sei. Despite its attractive performance in stabilizing lithium metal anodes, current anion-derived SEIs are insufficient in meeting the challenges of practical conditions. Yog li ntawd, nws yog ib qho tsim nyog los txhim kho kev ruaj ntseg thiab kev sib txawv ntawm anion-tau los ntawm SEi kom kov yeej cov kev cov nyom hauv cov xwm txheej tiag tiag.

Anions nyob rau hauv daim ntawv ntawm CIP thiab Agg yog lub ntsiab ua ntej rau anion-derived sei. Feem ntau, cov qauv electroly yog indirectly tswj hwm los ntawm cov kuab tshuaj thiab siluent molecules yog cov tsis muaj zog thiab tsis tuaj yeem cuam tshuam nrog Anes. Yog li ntawd, cov tswv yim tshiab rau kev tswj hwm cov qauv ntawm anionic electrolytes los ntawm kev cuam tshuam ncaj qha nrog cov actions yog xav tau.