Libetri tsa lithium-ion bakeng sa likoloi tsa motlakase (EVs) li tobana le litaba tsa polokeho le botsitso ka lebaka la ho chesa ho feteletseng ha li-separators, li-circuits tse khutšoane le ho fokotsa ts'ebetso. Ka sepheo sa ho fokotsa mefokolo ena, bafuputsi ba ile ba sebelisa mokhoa oa graft polymerization mme ba hlahisa li-separator tse nang le li-silika tse nang le li-nanoparticles tse tsitsitseng le tse tšoarellang. Libetri tse nang le likarohano tsena li bolokehile ebile li bonts'itse ts'ebetso e ntlafalitsoeng. Nts'etsopele ena e ka kenya letsoho ho amoheloeng ha li-EV molemong oa ho tlosa khabone ea lipalangoang.
Lithium-ion e ka nchafatsoang Batteries (kapa libetri tsa Li-ion kapa LIBs) li se li tumme haholo ebile li fumaneha hohle lilemong tse mashome a mararo tse fetileng. Ka lebaka la matla a mangata a matla, boima bo bobebe le ho nchafatsoa hape, tsena li sebelisoa haholo mehalang ea cellular, lilaptop, lisebelisoa tse bonoang ka molumo, polokelo ea matla le likoloi tsa motlakase (EVs) mme li fetohile karolo ea bohlokoa ea bophelo ba letsatsi le letsatsi. Li-LIB li na le tikoloho, li fana ka polokelo e hloekileng ea matla 'me li kenya letsoho ho decarbonising moruo.
Leha ho le joalo, lithium-ion Batteries ho tobana le kotsi ea polokeho bakeng sa likoloi tsa motlakase (EVs) le lits'ebetso tsa polokelo ea matla haholo-holo ka lebaka la ho chesa haholo ha li-separators tsa polyolefin. Li-separators li thibela ho kopana ka ho toba pakeng tsa cathode le anode, empa lia qhibiliha ha mocheso o nyolohela ho 160 ° C ka lebaka la mocheso o feteletseng. Ka lebaka leo, anode le cathode li ka 'na tsa kopana ka ho toba ka ho thehoa ha Li dendrites ka hona li-circuits tsa ka hare tse khutšoanyane le ho kenngoa ka mokhoa o sa lekaneng oa electrolyte le ho fokotsa katleho.
Ho bile le boiteko ba ho sebetsana le bofokoli bona. Ho ne ho nahanoa hore ho sebelisa seaparo sa letsopa ho ne ho nahanoa empa ho ile ha fumanoa ho sa tšoanelehe hobane ho ile ha eketsa botenya ba likarohano le ho fokotsa ho khomarela.
Phuputsong ea morao-rao, bafuputsi ba Incheon National University ba sebelisitse mokhoa oa graft polymerization ho hokela lesela le ts'oanang la silicon dioxide (SiO).2) nanoparticles ho li-separators tsa polypropylene (PP). Ka hona, li-separators li fetotsoe ka ho roala ha SiO2 Botenya ba 200 nm bo khona ho mamella mocheso le ho hatelloa ha sebopeho sa dendrite ha se ntse se boloka matla a ho boloka matla. Sena se fana ka maikutlo a hore polypropylene-based separator (PPS) ea libeteri tsa Li-ion e ka ntlafatsoa ho fokotsa li-circuits tsa ka hare le ho etsa hore betri e bolokehe le ho sebetsa hantle.
Nts'etsopele ena e nepahetse ebile ea ts'episa li-LIB likoloing tsa motlakase (EVs) le lits'ebetso tsa polokelo ea matla. Ha li se li rekisitsoe, li-LIB tse ntlafalitsoeng tse nang le polokeho le ts'ebetso e ntle li ka thusa ho nka likoloi tsa motlakase tse sebetsang hantle.
***
References:
- Manthiram, A. Pontšo ea k'hemistri ea cathode ea betri ea lithium-ion. Nat Commun 11, 1550 (2020). https://doi.org/10.1038/s41467-020-15355-0
- Park J., et al a 2024. Ultra-thin SiO2 nanoparticle layered separators ka holim'a leano la ho sebetsa ka bongata bakeng sa libeteri tsa Li-metal: Ho hanyetsa Li-dendrite tse matla haholo le thepa ea mocheso. Lisebelisoa tsa ho Boloka Matla. Buka ea 65, Hlakola 2024, 103135. DOI: https://doi.org/10.1016/j.ensm.2023.103135
***
 face safety and stability issues due to overheating of separators, short circuits and reduced efficiency. With an aim to mitigate these shortcomings, researchers used a graft polymerization technique and developed innovative silica nanoparticles layered separators that are thermally stable and durable. Batteries with these separators are safer and showed improved performance. This development can contribute to adoption of EVs towards decarbonising transport sector. ){kind=link}