Ts'ebetso ea Libetri tsa Lithium e Sentsoe Butle-butle

Ts'ebetso ea Libetri tsa Lithium e Sentsoe Butle-butle

Li-silicone anode li hohetse tlhokomelo e kholo indastering ea betri.Ha ho bapisoalibeteri tsa lithium-ionsebelisa graphite anode, ba ka fana ka makhetlo a 3-5 matla a maholo.Bokhoni bo boholo bo bolela hore betri e tla tšoarella nako e telele ka mor'a tefiso e 'ngoe le e' ngoe, e leng se ka atolosang sebaka sa ho khanna ha likoloi tsa motlakase.Le ha silicon e le ngata ebile e theko e tlase, lipotoloho tsa tefiso tsa Si anode li na le moeli.Nakong ea potoloho e 'ngoe le e' ngoe ea tefiso, molumo oa bona o tla atolosoa haholo, esita le bokhoni ba bona bo tla fokotseha, e leng se tla lebisa ho robeheng ha likaroloana tsa electrode kapa delamination ea filimi ea electrode.

Sehlopha sa KAIST, se etelletsoeng ke Moprofesa Jang Wook Choi le Moprofesa Ali Coskun, se tlalehile ka 20 July sekhomaretsi sa molecular pulley bakeng sa matla a maholo a betri ea lithium ion e nang le silicon anode.

Sehlopha sa KAIST se kentse li-pulleys tsa molek'hule (tse bitsoang polyrotaxanes) ho li-binders tsa li-electrode tsa betri, ho kenyelletsa le ho eketsa li-polymer ho li-electrode tsa betri ho hokela li-electrode ho li-substrates tsa tšepe.Masale a polyrotane a kentsoe ka har'a skeleton ea polymer 'me a ka tsamaea ka bolokolohi haufi le skeleton.

Masale a polyrotane a ka tsamaea ka bolokolohi ka phetoho ea molumo oa likaroloana tsa silicon.Ho thella ha mehele ho ka boloka sebopeho sa likaroloana tsa silicon ka katleho, e le hore li se ke tsa senyeha ts'ebetsong e tsoelang pele ea phetoho ea molumo.Hoa hlokomeleha hore esita le likaroloana tsa silicon tse pshatlehileng li ka lula li kopane ka lebaka la elasticity e phahameng ea li-adhesive tsa polyrotane.Mosebetsi oa li-adhesives tse ncha o fapane haholo le oa li-adhesive tse teng (hangata li-polymers tse bonolo).Likhomaretsi tse teng li na le elasticity e fokolang 'me ka hona li ke ke tsa boloka ka tieo sebopeho sa likaroloana.Likhomaretsi tse fetileng li ka hasanya likaroloana tse pshatlehileng le ho fokotsa kapa hona ho lahleheloa ke matla a li-electrode tsa silicon.

Mongoli o lumela hore ena ke pontšo e babatsehang ea bohlokoa ba lipatlisiso tsa motheo.Polyrotaxane e hapile Moputso oa Nobel selemong se fetileng bakeng sa mohopolo oa "mechanical bonds"."Mechanical bonding" ke khopolo e sa tsoa hlalosoa e ka kenyelletsoang ho li-bond tsa khale tsa lik'hemik'hale, tse kang li-covalent bond, li-ionic bond, li-coordination bond le li-metal bond.Lipatlisiso tsa motheo tsa nako e telele li ntse li sebetsana butle-butle le liphephetso tsa nako e telele tsa theknoloji ea betri ka lebelo le sa lebelloang.Bangoli ba boetse ba boletse hore hajoale ba sebetsa le moetsi e moholo oa betri ho kopanya li-pulleys tsa bona tsa molek'hule ho lihlahisoa tsa betri tsa nnete.

Sir Fraser Stoddart, mohapi oa Khau ea Noble Laureate Chemistry ea 2006 Univesithing ea Northwestern, o ekelitse: “Litlamo tsa mochini li khutletse lekhetlo la pele sebakeng sa polokelo ea matla.Sehlopha sa KAIST se sebelisitse ka boqhetseke li-binders tsa mochini ho li-polyrotaxanes tsa slip-ring le alpha-cyclodextrin spiral polyethylene glycol, ho tšoaea katleho tšebetsong ea libeteri tsa lithium-ion 'marakeng, ha li-aggregate tse nang le sebopeho sa pulley tse nang le li-brand tsa mochini.Lik'hemik'hale li nka sebaka sa lisebelisoa tse tloaelehileng ka bond e le 'ngoe feela ea lik'hemik'hale, e tla ba le tšusumetso e kholo ho thepa ea thepa le thepa.


Nako ea poso: Mar-10-2023