Cov roj teeb lithium tau hloov pauv cov khoom siv hluav taws xob hauv xov tooj ntawm tes thiab tau siv hauv cov khoom siv hluav taws xob tshiab, tab sis kev txhim kho ntxiv hauv lub neej thiab lub zog yuav xav tau cov thev naus laus zis tshiab. Ib qho kev xaiv yog cov roj teeb lithium hlau, uas muaj roj teeb lub neej ntev thiab kev them nqi sai, tab sis muaj teeb meem nrog cov cuab yeej no. Lithium deposits, hu ua dendrites, zoo li loj hlob ntawm lub anode thiab tuaj yeem tsim ib qho luv luv Circuit Court, ua rau lub roj teeb tsis ua haujlwm, hluav taws kub lossis tawg.

Tam sim no, cov kws tshawb fawb los ntawm lub koom haum ntawm Chemistry, Suav Academy ntawm Sciences, University of Suav Academy ntawm Sciences, thiab Tuam Tshoj High Pressure Science thiab Technology Research Center tau tsim ib lub membrane cais raws li carbon allotropes. Nws yog hu ua graphene, uas ua raws li lithium ion lim los tiv thaiv kev loj hlob dendritic [Shangetal. Material.10(2018) 191-199].

Cov roj teeb lithium hlau zoo ib yam li lub tswv yim rau lithium roj teeb, tab sis cia siab rau lithium hlau anodes. Thaum lub sij hawm tso tawm, lub lithium anode muab electrons rau cathode los ntawm ib tug sab nraud Circuit Court. Txawm li cas los xij, thaum them nyiaj, lithium tso rau ntawm lub anode. Hauv cov txheej txheem no, tsis xav tau dendrites yuav tsim.

Qhov no yog lub luag haujlwm ntawm lub diaphragm. Lub membrane cais ua los ntawm ultra-thin (10nm) graphite diacetylene (ob-dimensional hexagonal carbon atom monolayer txuas los ntawm succinic acid chains) muaj txiaj ntsig tseem ceeb. Graphite diacetylene tsis tsuas yog muaj elasticity thiab toughness, tab sis nws cov qauv tshuaj kuj tsim ib qho pore network, cia tsuas yog ib qho lithium ion dhau mus. Qhov no tswj kev txav ntawm ions los ntawm daim nyias nyias, uas ua rau muaj qhov sib txawv ntawm cov ions. Qhov tseem ceeb, tus yam ntxwv zoo no inhibits kev loj hlob ntawm lithium dendrites.

Li Yuliang ntawm lub koom haum ntawm Chemistry ntawm Suav Academy ntawm Sciences, uas yog tus thawj coj ntawm kev tshawb fawb, piav qhia hais tias lithium dendrites muaj peev xwm stabilize cov khoom electrolyte interface, yog li ncua lub neej ntawm cov cuab yeej thiab lub zog Coulomb. Tiv thaiv tsob ntoo zoo li luv luv thiab ncav cuag lub roj teeb kom zoo.

Cov kws tshawb fawb ntseeg tias cov yeeb yaj kiab graphene-diethyne tuaj yeem kov yeej qee qhov teeb meem pos uas ntsib los ntawm lithium roj teeb thiab lwm cov roj teeb hlau alkaline.

Li hais tias graphitic diacetylene yog ib qho khoom siv nrog cov qauv sib txuas, qhov sib txawv ntawm qhov sib txawv, ntuj macroporous qauv thiab semiconductor muaj nuj nqi. Nws muab lub zeem muag loj rau kev daws teeb meem kev tshawb fawb loj hauv daim teb no.

Cov ntaub ntawv ob-dimensional kuj tseem yooj yim heev, thiab nws yooj yim kom tau txais nyob rau hauv kev sim dav dav.

Cov kws tshawb fawb tau hais rau cov neeg sau xov xwm tias txawm hais tias yuav tsum tau ua haujlwm ntau ntxiv txhawm rau txhim kho cov yeeb yaj kiab graphite-diacetylene ntawm qhov loj, peb ntseeg tias graphite-diacetylene yuav muaj kev cuam tshuam loj rau kev nyab xeeb ntawm lithium roj teeb.