Li-sieve tsa limolek'hule tsa Zeolite li ka sebelisoa ho li-electrolyte tsa dehydrate ka ho bapatsa 'mele, ho qoba litlamorao tse mpe tsa metsi mme ka hona ho ntlafatsa ts'ebetso le polokeho ea betri ea lithium, e hohetseng tlhokomelo e ntseng e eketseha haufinyane.
Likarolo tsa Lithium Electrolyte tse Tloaelehileng
Li-solvents tsa tlhaho ke karolo e ka sehloohong ea electrolyte, e etsang karolo ea 80% ~ 90%. Li-solvents tsena li kenyelletsa ethylene carbonate (EC), dimethyl carbonate (DMC), propylene carbonate (PC), diethyl carbonate (DEC), ethyl methyl carbonate (EMC), joalo-joalo.
Letsoai la lithium ke karolo e 'ngoe ea electrolyte mme ke mohloli oa mantlha oa lithium. Matsoai ana a lithium a kenyelletsa lithium hexafluorophosphate (LiPF6), lithium bis(fluorosulfonyl)imide (LiFSI), lithium tetrafluoroborate (LiBF₄), lithium perchlorate (LiClO₄), joalo-joalo.
Li-additives li etsa karolo ea 5 lekholong ea electrolyte. Li-additives tsena li kenyelletsa filimi-li-additives tse etsang filimi,{3}}li-additives tse sa sebetseng ka nako e itseng, li-stabilizer, joalo-joalo. Mohlala, lifilimi tse tloaelehileng{5}}tse etsang li-additives tse kang vinyl carbonate (VC), fluorinated vinyl carbonate (FEC).
Ka kakaretso, ts'ebetso ea lithium electrolyte e itšetlehile ka phello ea synergistic ea li-solvents, letsoai la lithium le li-additives. Ka mohlala, motsoako oa EC/DMC motsoako oa solvent le LiPF6e ka leka-lekanya bobeli ba ionic conductivity le botsitso.
Liphello Tsa Boteng ba Metsi ka har'a Electrolytes
Likarolo tseo li amehile haholo ka ts'ebetso ea electrochemical, metsi le litšila li ka ama haholo tlhahiso le boleng ba libeteri tsa lithium. Ka mohlala:
Metsi a ka itšoara ka lik'hemik'hale ka letsoai la lithium ka electrolyte ho hlahisa lintho tse kotsi tse kang hydrofluoric acid (HF) le lithium fluoride (LiF), e ka senyang sebopeho sa betri, ea baka ho lutla kapa li-circuits tse khutšoanyane, le ho fokotsa matla a betri.
Filimi e tiileng ea electrolyte interface (SEI) e entsoeng ke filimi-e etsang li-additives e ka senyeha ke metsi, ea lahleheloa ke ho teteana le ho tšoana, e leng se lebisang ho eketseha ha ho hanyetsa ka hare ho betri le ho fokotseha ha matla a ho ntša metsi.
Nakong ea ho tjhaja le ho ntša metsi, metsi a ka bola ho hlahisa likhase (tse kang CO₂ le H₂), tse eketsang khatello ea ka hare ea betri. Sena se ka etsa hore betri e phatlohe, ho lutle ha mokelikeli, esita le ho tsuba, mollo, le ho phatloha, e leng se ka behang kotsi ea polokeho.
Likotsi tsa metsi tse boletsoeng kalafong ea solvent le tsona li teng ho electrolyte. Ka kakaretso, ho ba teng ha metsi ho ama electrolyte conductivity, botsitso ba sebopeho sa electrolyte, le bophelo ba potoloho ea betri le polokeho, ke ntlha ea bohlokoa ea ho laola tlhahiso le tšebeliso ea libeteri tsa lithium.
Li-Sieves tsa Molek'hule Bakeng sa ho felloa ke metsi 'meleng ka Electrolyte
Ts'ebeliso ea li-sieve tsa limolek'hule ka har'a li-electrolyte li fapana ho ea ka merero ea tsona e ikhethileng, joalo ka ho omisa motsoako, ho felloa ke metsi 'meleng oa electrolyte le deacidization, nchafatso ea electrolyte, le ntlafatso ea ts'ebetso ea electrochemical.
Mofuta oa 5A Zeolite Molecular Sieve ke eona e ratoang ka ho fetisisa bakeng sa ho felloa ke metsi ka electrolyte, 'me e ka khona ho tlosa metsi ka mokhoa o atlehileng ho tloha ho electrolyte, ho thibela ho eketseha ha ho hanyetsa ka hare le karabelo ea electrochemical, kahoo e ntlafatsa ts'ebetso le polokeho ea betri ea lithium.
Mofuta oa 3A, 4A, 13X, mofuta, mofuta oa lithium, le li-sieve tsa molek'hule tse entsoeng ka zeolite li ka sebelisoa ka mokhoa o ikhethileng ho li-electrolyte tsa lithium. Ka ho sebelisa matla a bona a ho bapatsa, thepa ea ion sieving le botsitso ba sebopeho, ho ntlafatsa bohloeki, botsitso le ts'ebetso ea libaesekele tsa li-electrolyte.
