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(Lithium metal anode) Icyiciro cyimiterere ya anion ikomoka kuri electrolyte ikomeye

Interpase ikomeye ya Electrolyte (SEI) ikoreshwa cyane mugusobanura icyiciro gishya cyakozwe hagati ya anode na electrolyte muri bateri ikora.Batiyeri zifite ingufu nyinshi za litiro (Li) zibangamiwe cyane na lithium dendritic ziyobowe na SEI idahuje.Nubwo ifite ibyiza byihariye mugutezimbere uburinganire bwa lithium, mubikorwa bifatika, ingaruka za SEI zikomoka kuri anion ntabwo ari nziza.Vuba aha, itsinda ry’ubushakashatsi rya Zhang Qiang ryo muri kaminuza ya Tsinghua ryasabye gukoresha reseptor ya anion kugirango uhindure imiterere ya electrolyte kugirango wubake SEI ihamye.Tris (pentafluorophenyl) borane anion reseptor (TPFPB) hamwe na atome ya boron ibura electron ikorana na bis (fluorosulfonimide) anion (FSI-) kugirango igabanye ituze rya FSI-.Mubyongeyeho, imbere ya TFPPB, ubwoko bwa ion cluster (AGG) ya FSI- muri electrolyte yarahindutse, kandi FSI- ikorana na Li + nyinshi.Kubwibyo, kubora kwa FSI- kuzamurwa kubyara Li2S, kandi ituze rya SEI ikomoka kuri anion iratera imbere.

SEI igizwe nibicuruzwa bigabanuka bya electrolyte.Ibigize n'imiterere ya SEI bigenzurwa cyane cyane nuburyo bwa electrolyte, ni ukuvuga imikoranire ya microscopique hagati ya solvent, anion, na Li +.Imiterere ya electrolyte ntabwo ihinduka gusa nubwoko bwumunyu wa lithium na lithium, ariko kandi hamwe nubwinshi bwumunyu.Mu myaka yashize, electrolyte yibanda cyane (HCE) hamwe na electrolyte yibanze cyane (LHCE) byagaragaje ibyiza bidasanzwe muguhindura anode ya lithium ikora SEI ihamye.Ikigereranyo cya molarike yumunyu wa lithium ni gito (munsi ya 2) kandi anion zinjizwa mumashanyarazi ya mbere yo gukiza ya Li +, ikora ion ebyiri (CIP) hamwe no guteranya (AGG) muri HCE cyangwa LHCE.Ibigize SEI nyuma bigengwa na anion muri HCE na LHCE, bita SEI ikomoka kuri anion.Nuburyo bukora neza muguhindura lithium ibyuma bya anode, SEI ziva muri anion ntizihagije mugukemura ibibazo byubuzima bwiza.Niyo mpamvu, birakenewe kurushaho kunoza ituze nuburinganire bwa SEI ikomoka kuri anion kugirango dutsinde ibibazo mubihe nyabyo.

Anion muburyo bwa CIP na AGG nibyo byingenzi bibanziriza SEI ikomoka kuri anion.Muri rusange, imiterere ya electrolyte ya anion igenzurwa mu buryo butaziguye na Li +, kubera ko amafaranga meza ya molekile ya solvent na diluent aba adakomeye kandi ntashobora gukorana na anion.Kubwibyo, ingamba nshya zo kugenzura imiterere ya anionic electrolytite ikorana na anion irateganijwe cyane.


Igihe cyo kohereza: Ugushyingo-22-2021