Cov kws tshawb fawb tau kwv yees cov pa roj carbon monoxide tshiab, zoo ib yam li graphene, tab sis nrog lub microstructure nyuaj dua, uas yuav ua rau cov roj teeb tsheb zoo dua.Graphene yog arguably tus nto moo tshaj plaws peculiar daim ntawv ntawm carbon.Nws tau raug tapped raws li txoj cai tshiab kev ua si rau lithium-ion roj teeb thev naus laus zis, tab sis cov txheej txheem tsim khoom tshiab tuaj yeem tsim cov roj teeb uas siv zog ntau dua.
Graphene tuaj yeem pom tau tias yog lub network ntawm carbon atoms, qhov twg txhua cov pa roj carbon atom txuas nrog peb cov pa roj carbon atoms los tsim cov hexagons me me.Txawm li cas los xij, cov kws tshawb fawb tau kwv yees tias ntxiv rau qhov ncaj qha honeycomb qauv, lwm cov qauv kuj tuaj yeem tsim tawm.
Qhov no yog cov khoom siv tshiab tsim los ntawm pab pawg los ntawm University of Marburg hauv Tebchaws Yelemees thiab Aalto University hauv Finland.Lawv coaxed carbon atoms rau hauv cov lus qhia tshiab.Lub npe hu ua biphenyl network yog tsim los ntawm hexagons, squares thiab octagons, uas yog ib qho nyuaj tshaj li graphene.Cov kws tshawb fawb hais tias, yog li ntawd, nws muaj qhov sib txawv loj heev, thiab qee qhov, cov khoom siv hluav taws xob xav tau ntau dua.
Piv txwv li, txawm hais tias graphene muaj nuj nqis rau nws lub peev xwm ua ib qho khoom siv hluav taws xob, cov pa roj carbon tshiab coj tus cwj pwm zoo li hlau.Qhov tseeb, thaum tsuas yog 21 atoms dav, cov kab txaij ntawm lub network biphenyl tuaj yeem siv los ua cov xov hluav taws xob rau cov khoom siv hluav taws xob.Lawv tau taw qhia tias ntawm qhov ntsuas no, graphene tseem coj zoo li lub semiconductor.
Tus kws sau ntawv tseem ceeb tau hais tias: "Cov pa roj carbon monoxide tshiab no tuaj yeem siv los ua cov khoom siv anode zoo heev rau cov roj teeb lithium-ion.Piv nrog cov ntaub ntawv graphene tam sim no, nws muaj peev xwm cia lithium ntau dua. "
Lub anode ntawm lithium-ion roj teeb feem ntau yog tsim los ntawm graphite kis rau ntawm daim ntawv tooj liab.Nws muaj cov hluav taws xob hluav taws xob siab, uas tsis yog tsuas yog qhov tseem ceeb rau kev thim rov qab tso lithium ions ntawm nws cov khaubncaws sab nraud povtseg, tab sis kuj vim nws tuaj yeem ua txuas ntxiv mus rau ntau txhiab lub voj voog.Qhov no ua rau nws lub roj teeb muaj txiaj ntsig zoo, tab sis kuj yog lub roj teeb uas tuaj yeem siv tau ntev yam tsis muaj degradation.
Txawm li cas los xij, kev siv tau zoo dua thiab cov kev hloov me me raws li cov pa roj carbon monoxide tshiab no tuaj yeem ua rau roj teeb lub zog cia ntau dua.Qhov no yuav ua rau lub tsheb fais fab thiab lwm yam khoom siv uas siv cov roj teeb lithium-ion me dua thiab sib dua.
Txawm li cas los xij, zoo li graphene, xav txog yuav ua li cas los tsim cov ntawv tshiab no ntawm qhov loj me yog qhov kev sib tw tom ntej.Txoj kev tam sim no ntawm kev sib dhos cia siab rau ntawm lub ntsej muag kub zoo nkauj uas muaj cov pa roj carbon monoxide pib tsim cov hlua txuas hexagonal.Cov kev cuam tshuam tom qab txuas cov saw hlau no los ua cov duab plaub thiab octagonal, ua rau qhov kawg tshwm sim txawv ntawm graphene.
Cov kws tshawb fawb tau piav qhia tias: "Lub tswv yim tshiab yog siv cov hloov kho molecular precursors los tsim biphenyl tsis yog graphene.Lub hom phiaj tam sim no yog tsim cov nplooj ntawv loj dua kom nws cov khoom tuaj yeem nkag siab zoo dua. "
Post lub sij hawm: Jan-06-2022