Cov kws tshawb fawb ntawm University of Tokyo tsis ntev los no tau ua ib qho kev ua tiav loj hauv lawv cov kev sim los ntawm kev ua tiav ib hom tshiab ntawm lithium-ion roj teeb uas muaj peev xwm ua tiav kev them nyiaj ruaj khov thiab tso tawm li ntawm 1,000 cycles yam tsis siv cobalt . Cov txiaj ntsig no tau luam tawm nyob rau hauv qhov teeb meem tshiab ntawm phau ntawv journal Nature - Sustainable Development.
Cobalt yog cov hlau tsis tshua muaj nqi nrog tus nqi siab thiab tsis paub tseeb xws li kev ua qias tuaj ib puag ncig. Yog li ntawd, cov kws tshawb fawb tau ntev tau nrhiav txoj hauv kev los txo lossis tshem tawm qhov kev thov rau cobalt hauv lithium-ion roj teeb. Tam sim no, ib qho ntawm cov khoom siv zoo tshaj plaws cathode yog lithium nickel manganate, uas yog tus cwj pwm los ntawm cov zis hluav taws xob siab, tus nqi qis thiab ib puag ncig tus phooj ywg.
Txhawm rau kov yeej qhov tsis txaus ntawm cov thev naus laus zis uas twb muaj lawm, pab pawg tshawb fawb ntawm University of Tokyo tau tsim cov electrolyte tshiab. Cov electrolyte no tuaj yeem khaws cov tshuaj tiv thaiv muaj peev xwm ntawm ob qho tib si zoo thiab tsis zoo electrodes ntawm lithium nickel manganate roj teeb nyob rau hauv qhov ntau yam uas tsis pub tshaj qhov txwv sab sauv ntawm lub qhov rais electrolyte. Nyob rau tib lub sijhawm, nws tseem tuaj yeem tsim cov yeeb yaj kiab tiv thaiv zoo los ntawm cov ntsev lithium rau ntawm qhov chaw ntawm qhov tsis zoo electrode, kov yeej cov teeb meem xws li stripping ntawm cov yeeb yaj kiab tiv thaiv los ntawm electrode nto thiab tawg ntawm qhov tsis zoo electrode tshwm sim los ntawm qhov loj ntim hloov hauv. lub silicon oxide tsis zoo electrode uas nrog them thiab tawm.
Pab pawg tsim qauv tshiab kuj tau ua tiav kev cuam tshuam sab nraud tshwm sim los ntawm electrolyte thiab electrodes, ua rau cov roj teeb cobalt-dawb lithium-ion kom ua tiav lub zog ntom ntom 1.6 npaug ntawm qhov qub. Hauv kev sim, lub roj teeb no tau ua tiav hauv kev ua tiav kev ua haujlwm ruaj khov ntawm qhov ua tau zoo, piv txwv li, kev them nyiaj ruaj khov thiab tso tawm li ntawm 1, 000 cycles, thiab ua tiav qhov muaj peev xwm ntawm 80% piv rau thawj lub peev xwm. Qhov kev kawm no yog qhov tseem ceeb ua rau cov kws tshawb fawb ntawm University of Tokyo uas tau ua tiav hauv kev tsim lub zog Lithium-ion thiab ua tiav kev ua tiav uas tsis muaj kev siv Cobalt.
Qhov kev daws teeb meem tshiab no tsis yog tsuas yog tshem tawm cov kev txwv ntawm kev ua haujlwm voltage ntawm lithium-ion roj teeb, tab sis kuj nthuav dav cov kev taw qhia ntawm kev txhim kho roj teeb yav tom ntej. Qhov kev ua txhaum tseem ceeb no yuav tsum txhawb nqa kev tsim tsheb hluav taws xob, cov khoom siv hluav taws xob thiab lwm yam kev lag luam, txo kev cia siab rau cov peev txheej tsawg, thiab txo cov pa phem ib puag ncig. Nyob rau hauv lub neej yav tom ntej, peb tos ntsoov rau kev lag luam thaum ntxov ntawm hom tshiab ntawm lithium-ion roj teeb.
[Source - Changjiang non-ferrous network].
