01 Libetri tsa lithium-air le libeteri tsa lithium-sulphur ke life?
① Betri ea Li-air
Betri ea lithium-air e sebelisa oksijene e le "electrode reactant" e ntle le tšepe ea lithium e le electrode e mpe.E na le matla a matla a theory (3500wh / kg), 'me matla a eona a matla a sebele a ka fihla ho 500-1000wh / kg, e leng holimo haholo ho feta mokhoa o tloaelehileng oa betri ea lithium-ion.Libetri tsa lithium-air li entsoe ka li-electrode tse ntle, li-electrolyte le li-electrode tse mpe.Lits'ebetsong tsa betri tse se nang metsi, oksijene e hloekileng e sebelisoa hajoale e le khase e arabelang, kahoo libeteri tsa lithium-air li ka boela tsa bitsoa libeteri tsa lithium-oxygen.
Ka 1996, Abraham et al.e atlehile ho bokella betere ea pele ea lithium-air e se nang metsi ka laboratoring.Eaba bafuputsi ba qala ho ela hloko karabelo ea ka hare ea electrochemical le mochine oa libeteri tsa lithium-air tse se nang metsi;ka 2002, Bala le tse ling.o fumane hore ts'ebetso ea electrochemical ea libeteri tsa lithium-air e itšetlehile ka lisebelisoa tsa electrolyte solvent le air cathode;ka 2006, Ogasawara et al.e sebelisitsoeng Mass spectrometer, e ile ea pakoa ka lekhetlo la pele hore Li2O2 e ne e le oxidized 'me oksijene e lokolloa nakong ea ho tjhaja, e leng se ileng sa tiisa hore electrochemical reversibility ea Li2O2.Ka hona, libeteri tsa lithium-air li fumane tlhokomelo e ngata le tsoelo-pele e potlakileng.
② Betri ea lithium-sulfur
Lithium-sebabole betri ke tsamaiso ea bobeli ea betri e thehiloeng ho karabelo e ka fetoloang ea matla a phahameng a khethehileng a sebabole (1675mAh/g) le tšepe ea lithium (3860mAh/g), e nang le motlakase o ka bang 2.15V.Matla a eona a theory e ka fihla ho 2600wh/kg.Lisebelisoa tsa eona tse tala li na le melemo ea theko e tlaase le botsoalle ba tikoloho, kahoo e na le bokhoni bo boholo ba tsoelo-pele.Ho qaptjoa ha libeteri tsa lithium-sulfur ho ka saloa morao ho tloha lilemong tsa bo-1960, ha Herbert le Ulam ba etsa kopo ea patent ea betri.Setšoantšo sa betri ena ea lithium-sulfur e sebelisitse lithium kapa lithium alloy e le lisebelisoa tse mpe tsa electrode, sebabole e le lisebelisoa tse ntle tsa electrode 'me li entsoe ka li-amine tsa aliphatic saturated.boemo ba electrolyte.Lilemo tse 'maloa hamorao, libeteri tsa lithium-sulfur li ile tsa ntlafatsoa ka ho hlahisa li-solvents tse kang PC, DMSO, le DMF, le libeteri tsa 2.35-2.5V li ile tsa fumanoa.Ho elella bofelong ba lilemo tsa bo-1980, li-ether li ile tsa pakoa li le molemo libeteri tsa lithium-sulphur.Liphuputsong tse latelang, ho sibolloa ha li-electrolyte tse thehiloeng ho ether, tšebeliso ea LiNO3 e le motsoako oa electrolyte, le tlhahiso ea li-electrode tse ntle tsa carbon / sulfur li butse tlhahiso ea lipatlisiso tsa libeteri tsa lithium-sulfur.
02 Molao-motheo o sebetsang oa betri ea lithium-air le betri ea lithium-sulfur
① Betri ea Li-air
Ho ea ka linaha tse fapaneng tsa electrolyte e sebelisitsoeng, libeteri tsa lithium-air li ka aroloa ka litsamaiso tse nang le metsi, litsamaiso tsa organic, litsamaiso tse nyalisitsoeng tsa metsi, le libeteri tsa lithium-air tse tiileng.Har'a bona, ka lebaka la matla a tlaase a lithium-air a sebelisa li-electrolyte tse thehiloeng metsing, mathata a ho sireletsa tšepe ea lithium, le ho se khonehe ha tsamaiso, li-betri tsa lithium-air tse se nang metsi le li-solid-state lithium-air. libeteri li sebelisoa haholo ha joale.Patlisiso.Libetri tsa lithium-air tse se nang metsi li ile tsa hlahisoa ka lekhetlo la pele ke Abraham le Z.Jiang ka 1996. The discharge reaction equation e bontšoa ho Setšoantšo sa 1. Tsela ea ho tjhaja e fapane.Electrolyte haholo-holo e sebelisa electrolyte ea tlhaho kapa electrolyte e tiileng, 'me sehlahisoa sa ho lahla ke haholo-holo Li2O2, sehlahisoa ha se khone ho qhibiliha ka har'a electrolyte,' me se bonolo ho bokella ka electrode e ntle ea moea, e amang matla a ho ntša betri ea lithium-air.
Libetri tsa lithium-air li na le melemo ea ho ba le matla a phahameng haholo, botsoalle ba tikoloho le theko e tlase, empa lipatlisiso tsa bona li ntse li le teng, 'me ho ntse ho e-na le mathata a mangata a lokelang ho rarolloa, joalo ka catalysis ea karabelo ea phokotso ea oksijene, phepelo ea oksijene le hydrophobicity ea li-electrode tsa moea, le ho tima li-electrode tsa moea joalo-joalo.
② Betri ea lithium-sulfur
Libetri tsa lithium-sulfur li sebelisa haholo-holo sebabole kapa metsoako e thehiloeng ho sebabole e le thepa ea elektrode e ntle ea betri, 'me lithium ea tšepe e sebelisoa haholo bakeng sa eleketrode e mpe.Nakong ea ts'ebetso ea ho ntša, lithium ea tšepe e teng ho electrode e mpe e na le oxidized ho lahleheloa ke elektronike le ho hlahisa li-ion tsa lithium;joale li-electrone li fetisetsoa ho electrode e ntle ka potoloho e ka ntle, 'me li-ion tsa lithium tse hlahisoang li boetse li fetisetsoa ho electrode e ntle ka electrolyte ho itšoara ka sebabole ho etsa polysulfide.Lithium (LiPSs), ebe e tsoela pele ho arabela ho hlahisa lithium sulfide ho phethela ts'ebetso ea ho tsoa.Nakong ea ts'ebetso ea ho tjhaja, li-ion tsa lithium ho LiPS li khutlela ho electrode e mpe ka electrolyte, ha lielektrone li khutlela ho electrode e mpe ka potoloho ea kantle ho theha tšepe ea lithium ka li-ion tsa lithium, 'me LiPS li fokotsehile ho sebabole ho electrode e nepahetseng ho phethela ts'ebetso ea ho tjhaja.
Ts'ebetso ea ho ntša li-betri tsa lithium-sulfur haholo-holo ke mehato e mengata, e mengata ea elektronike, e nang le mekhahlelo e mengata e rarahaneng ea electrochemical reaction ka sulfur cathode, 'me LiPS tse nang le bolelele bo fapaneng ba ketane li fetoloa ho tse ling nakong ea ts'ebetso ea ho ntša chelete.Nakong ea ts'ebetso ea ho ntša, karabelo e ka 'nang ea etsahala ho electrode e ntle e bontšoa ho Setšoantšo sa 2,' me karabelo ho electrode e mpe e bontšoa ho Setšoantšo sa 3.
Melemo ea libeteri tsa lithium-sulfur e totobetse haholo, tse kang bokhoni bo phahameng haholo ba theory;ha ho na oksijene linthong, 'me karabelo ea ho iphetola ha oksijene e ke ke ea etsahala, kahoo ts'ebetso ea ts'ireletso e ntle;lisebelisoa tsa sebabole li ngata 'me sebabole sa motheo se theko e tlaase;ha e na tikoloho ebile e na le chefo e tlase.Leha ho le joalo, libeteri tsa lithium-sulfur li boetse li na le mathata a mang a thata, a kang lithium polysulfide shuttle effect;ho kenngoa ha sebabole sa elemental le lihlahisoa tsa eona tse tsoang;bothata ba ho fetoha ha molumo o moholo;SEI e sa tsitsang le mathata a tšireletso a bakoang ke lithium anode;ho intša kotsi, joalo-joalo.
Joaloka moloko o mocha oa tsamaiso ea bobeli ea betri, libeteri tsa lithium-air le libeteri tsa lithium-sulfur li na le litekanyetso tse phahameng haholo tsa theory, 'me li hohetse tlhokomelo e kholo ho tsoa ho bafuputsi le maraka a bobeli a betri.Hona joale, libeteri tsena tse peli li ntse li tobane le mathata a mangata a saense le theknoloji.Ba mothating oa pele oa lipatlisiso tsa nts'etsopele ea betri.Ho phaella ho matla a khethehileng le botsitso ba thepa ea cathode ea betri e hlokang ho ntlafatsoa ho ea pele, lintlha tsa bohlokoa tse kang polokeho ea betri le tsona li hloka ho rarolloa ka potlako.Nakong e tlang, mefuta ena e 'meli e mecha ea libeteri e ntse e hloka ntlafatso e tsoelang pele ea tekheniki ho felisa mefokolo ea bona e le ho bula menyetla e batsi ea ts'ebeliso.
Nako ea poso: Apr-07-2023