Lithium-ion roj teeb rau lub tsheb fais fab (EVs) ntsib teeb meem kev nyab xeeb thiab ruaj ntseg vim yog overheating ntawm cov khoom sib cais, luv Circuit Court thiab txo efficiency. Nrog lub hom phiaj los txo cov kev tsis txaus no, cov kws tshawb fawb tau siv cov txheej txheem graft polymerization thiab tsim cov silica nanoparticles txheej txheej cais uas muaj thermally ruaj khov thiab ruaj khov. Cov roj teeb nrog cov tshuab cais no muaj kev nyab xeeb dua thiab pom tias muaj kev ua tau zoo dua. Qhov kev txhim kho no tuaj yeem pab txhawb nqa EVs mus rau decarbonising thauj sector.
Rechargeable lithium-ion roj teeb (lossis Li-ion roj teeb lossis LIBs) tau dhau los ua neeg nyiam thiab muaj nyob thoob plaws hauv peb lub xyoo dhau los. Vim muaj zog ceev, lub teeb yuag thiab rechargeability, cov no yog dav siv nyob rau hauv lub xov tooj ntawm tes, laptops, audio-visual devices, hwj chim cia thiab hluav taws xob tsheb (EVs) thiab tau dhau los ua ib feem ntawm lub neej txhua hnub. LIBs yog eco-phooj ywg, muab lub zog huv thiab pab txhawb rau decarbonising kev khwv nyiaj txiag.
Txawm li cas los xij, lithium-ion roj teeb fim kev nyab xeeb kev nyab xeeb rau lub tsheb hluav taws xob (EVs) thiab lub zog cia tshuab feem ntau vim yog overheating ntawm polyolefin separators. Cov separators tiv thaiv kev sib cuag ncaj qha ntawm cathode thiab anode, tab sis lawv yaj thaum kub nce mus rau 160 ° C vim overheating. Yog li ntawd, anode thiab cathode tuaj yeem sib cuag ncaj qha los ntawm kev tsim ntawm Li dendrites li no nyob rau hauv luv luv circuits thiab tsis txaus nqus ntawm electrolytes thiab txo efficiency.
Muaj kev siv zog los daws qhov tsis txaus no. Kev siv cov txheej txheem ceramics tau xav txog tab sis pom tias tsis tsim nyog vim tias nws nce thickness ntawm cov khoom sib cais thiab txo cov adhesion.
Hauv kev tshawb fawb tsis ntev los no, cov kws tshawb fawb Incheon National University tau siv cov txheej txheem graft polymerization los txuas cov txheej txheem ntawm silicon dioxide (SiO)2) nanoparticles rau polypropylene (PP) separators. Cov separators yog li hloov nrog ib txheej ntawm SiO2 ntawm 200 nm thickness yog ntau dua kub resistant thiab suppressed dendrite tsim thaum tuav lub zog cia muaj peev xwm. Qhov no qhia tias polypropylene-raws li cais cais (PPS) ntawm Li-ion roj teeb tuaj yeem tsim kho kom txo qis hauv Circuit Court luv thiab ua kom lub roj teeb muaj kev nyab xeeb thiab siv tau zoo.
Qhov kev txhim kho no muaj feem cuam tshuam thiab cog lus rau LIBs hauv tsheb hluav taws xob (EVs) thiab lub zog cia. Thaum ua lag luam, cov LIBs improvised nrog kev nyab xeeb thiab kev ua haujlwm zoo tuaj yeem pab txhawb nqa cov tsheb hluav taws xob hauv eco.
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References:
- Manthiram, A. Ib qho kev xav ntawm lithium-ion roj teeb cathode chemistry. Hnub Tim 11, 1550 (2020). https://doi.org/10.1038/s41467-020-15355-0
- Park J., thiab al 2024. Ultra-thin SiO2 nanoparticle txheej txheej cais los ntawm ntau qhov chaw ua haujlwm zoo rau Li-hlau roj teeb: Ua kom zoo dua Li-dendrite tsis kam thiab thermal zog. Cov Khoom Siv Hluav Taws Xob. Volume 65, Lub Ob Hlis 2024, 103135. DOI: https://doi.org/10.1016/j.ensm.2023.103135
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 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}