Lub lithium ion roj teeb lub neej puas tuaj yeem txuas ntxiv mus ntxiv cov khoom siv hydrogen?

Mwandishi:Iflowpower- Leverandør av bærbar kraftstasjon

Cov kws tshawb fawb ntawm Raunns Rifo Moore National Laboratory (LLNL) pom tias lub roj teeb muaj peev xwm tuaj yeem txhim kho tau zoo ntev npaum li cov khoom siv hydrogen ntxiv rau cov electrodes ntawm lithium-ion roj teeb, uas yuav txuas ntxiv lub sijhawm ua haujlwm thiab ua kom cov haujlwm sib kis. Lub lithium ion roj teeb yog ib hom roj teeb rechargeable, thiab lithium ion tau txav los ntawm lub roj teeb mus rau qhov zoo electrode thaum lub sij hawm tso tawm, thiab lithium ion ntawm cov electrode zoo yog tsiv rov qab mus rau qhov tsis zoo electrode thaum them nyiaj. Lub lithium ion roj teeb yog ib hom roj teeb rechargeable, thiab lithium ion tau txav los ntawm lub roj teeb mus rau qhov zoo electrode thaum lub sij hawm tso tawm, thiab lithium ion ntawm cov electrode zoo yog tsiv rov qab mus rau qhov tsis zoo electrode thaum them nyiaj.

Cov roj teeb lithium ion muaj ob peb yam tseem ceeb, qhov hluav taws xob, thiab lub zog ceev, qhov ua tau zoo ntawm cov yam ntxwv no yog qhov kawg txiav txim siab los ntawm kev sib xyaw ntawm lithium ions thiab cov khoom siv electrode. Nyob rau hauv cov qauv ntawm cov electrode, hloov maj mam hloov nyob rau hauv chemistry thiab cov duab tej zaum yuav ho cuam tshuam lithium ions muaj zog bonded rau lawv muaj zog bonding. Los ntawm kev sim thiab kev suav, cov kws tshawb fawb tshawb fawb ntawm Livermore National Lab pom tias nyob rau hauv lithium-ion roj teeb, hydrogen-kho graphene ua npuas dej electrode muaj peev xwm ntau dua thiab muaj peev xwm kis tau sai.

"Cov kev tshawb pom no muab kev soj ntsuam zoo, uas pab tsim cov hluav taws xob hluav taws xob siab raws li cov khoom siv graphene," LLNL tus kws tshawb fawb khoom Morriswang tau hais. Nws kuj yog ib tug ntawm cov sau phau ntawv no luam tawm nyob rau hauv Natural Science Report (NatureScientificReports Journal). Gallene cov ntaub ntawv nyob rau hauv kev lag luam daim ntawv thov ntawm lub zog cia khoom, suav nrog lithium-ion roj teeb thiab supercapacitors, cuam tshuam nws lub peev xwm los tsim cov khoom no nrog tus nqi qis.

Txoj kev siv tshuaj lom neeg feem ntau siv thaum kawg yuav tawm ntau cov hydrogen atoms, uas yog qhov nyuaj rau kev txiav txim siab qhov cuam tshuam ntawm electrochemical kev ua tau zoo ntawm graphene. Kev sim hauv Livermore Lab cov kws tshawb fawb tau pom tias cov khoom siv hydrogen txhob txwm ua kom lub hauv paus kub kho ntawm cov nplej nplua nuj graphene, uas tuaj yeem txhim kho tus nqi peev xwm. Tom qab qhov tsis xws luag ntawm cov khoom siv hydrogen thiab qhov tsis xws luag hauv graphene, qhov pore me me tau qhib, uas tuaj yeem txhawb nqa lithium ions yooj yim rau nkag mus, yog li txhim kho tus nqi sib kis.

Ntau lub peev xwm cyclicable tuaj yeem muab los ntawm lithium ion txuas rau ntawm ntug tshiab (feem ntau yuav ua raws li cov khoom siv hydrogen). "Kev txhim kho kev ua haujlwm ntawm cov electrode yog qhov tseem ceeb tshaj plaws, uas tuaj yeem qhib ntau lub ntiaj teb kev siv," hais tias tus kws tshawb fawb postdoctoral ntawm Livermore Laboratory Materials Science thiab tus kws sau ntawv tseem ceeb ntawm cov ntaub ntawv tshawb fawb tau hais. Txhawm rau thov kev siv hydrogenation thiab hydrogenation tsis xws luag hauv lithium ion cia khoom ntawm graphene, cov kws tshawb fawb tau siv cov kev kho cua sov sib txawv los ntawm kev khi hydrogen, tsom rau cov khoom siv hluav taws xob ntawm nws 3D graphene nanofoam (GNF).

Ua los ntawm graphene tsis zoo. Cov kws tshawb fawb siv 3D graphite nano ua npuas ncauj vim nws muaj ntau yam kev siv, suav nrog hydrogen cia, catalysis, pom, rwb thaiv tsev, lub zog nqus, capacitance desal, supercapacitors thiab lithium-ion roj teeb, thiab lwm yam. Cov yam ntxwv ntawm graphene 3D ua npuas ncauj uas tsis yog-nplaum nplaum tsis tuaj yeem ua rau tsis yooj yim vim tias cov khoom siv ntxiv yog qhov nyuaj dua, thiab yog li siv tau los ua qhov kev xaiv zoo tshaj plaws rau kev tshawb fawb mechanism.

"Peb pom tias tom qab kev kho mob ntawm hydrogen caij, graphite olee ua npuas ncauj electrode muaj kev vam meej. Nrog rau kev sib xyaw ua ke ntawm qhov kev sim no, peb yuav taug qab cov kev sib cuam tshuam me me thiab kev nce qib ntawm qhov tsis xws luag thiab cov kev daws teeb meem hydrogen. Hauv kev teb rau cov txiaj ntsig ntawm qee qhov kev hloov pauv me me hauv graphene chemistry thiab morphology, nws muaj peev xwm ua rau muaj kev cuam tshuam loj heev hauv kev ua tau zoo, "LLNL cov kws tshawb fawb kuj tseem muaj lwm tus sau ntawm txoj kev tshawb no" Brandonwood.

Raws li txoj kev tshawb no, qhov kev kho hydrogen tshuaj tswj no tuaj yeem siv rau hauv lwm cov khoom siv graphene-raws li anode kom ua tau zoo tshaj lithium ion kis tau tus mob thiab cov ntaub ntawv khaws cia rov ua dua.