Kev Tsis Pom Zoo Pob Zeb Ntsev Thiab Hloov Hlau Anodes - Engineering Lub Roj Teeb Ntawm Lub Neej Yav Tom Ntej

2023 Tus sau: Isabella Ferguson | [email protected]. Kawg hloov kho: 2023-08-03 14:10

Cov neeg nyiam hais dab tsi tsis muaj tseeb tab sis tuag thiab se. Tab sis muaj lwm yam ntxiv uas peb tuaj yeem paub tseeb - tshaj tawm txog blockbuster lub roj teeb tshiab thev naus laus zis uas cog lus tias lub zog hluav taws xob ntau dua thiab cov sijhawm them luv. Raws li qhov pom tias kev tshawb pom hauv lub lab feem ntau siv sijhawm ntau xyoo los ua lawv txoj hauv kev tsim khoom, ob daim ntawv tshaj tawm lub lim tiam no qhia tias cov menyuam ntawm tag kis yuav xav txog roj teeb lithium-ion niaj hnub no txoj kev uas cov menyuam niaj hnub xav txog transistors.

Tsis Pom Zoo Pob Zeb Hmoov

Cov kws tshawb fawb ntawm UC San Diego tau tshawb pom qhov khoom siv tshiab uas lawv hu ua cov ntsev pob zeb tsis sib haum uas ua rau cov roj teeb lithium-ion muaj kev nyab xeeb kom them rov qab rau hauv ob peb feeb thiab kav ntev rau ntau txhiab leej. Lawv yog tsim los ntawm lithium, vanadium, thiab oxygen oxygen atoms uas tau npaj ntau tib yam li cov rooj noj mov hauv chav ua noj ntsev tshwj tsis yog muab faib rau ib qho. Cov kev tshawb fawb tau ua los ntawm cov kws tshaj lij Ping Liu thiab Shyue Ping Ong thiab tau luam tawm Lub Cuaj Hli 2 hauv phau ntawv Journal Xwm.

Lub sijhawm tam sim no, ob cov khoom siv feem ntau siv los ua anodes hauv cov roj teeb lithium-ion muaj graphite, uas yog lub zog ntom, thiab cov roj ntsha lithium titanate, uas tso cai kom them sai dua tsis muaj kev phom sij tab sis muaj qis zog lub zog. Kev tsis sib haum xeeb pob zeb ntsev anode muaj cov khoom nyob hauv qee qhov nruab nrab ntawm ob. Nws muaj kev nyab xeeb dua los siv dua li graphite tseem muaj lub zog ntuag tsawg kawg 70% ntau dua li ntawm lithium titanate.

"Lub peev xwm thiab lub zog yuav qis dua me me li graphite, tab sis nws tau nrawm dua, kev nyab xeeb thiab muaj lub neej ntev. Nws muaj qhov ntsuas hluav taws xob qis dua thiab yog li muaj ntau lub zog hluav taws xob ceev dua qhov tam sim no kev lag luam ceev them cov roj ntsha lithium-titanate anodes, "hais tias Haodong Liu, tus kws tshaj lij sab nraud ntawm kws tshaj lij Ping Liu lub lab thiab thawj tus kws sau ntawv. "Yog li nrog cov khoom siv no peb tuaj yeem ua kom them sai, muaj roj teeb zoo nrog lub neej ntev, tsis muaj kev txi ntau ntawm lub zog siv." Raws li Kev Tshawb Fawb Txhua Hnub, kev siv thawj zaug rau cov roj teeb nrog cov cim tshiab yuav yog lub tsheb npav hluav taws xob thiab cov cuab yeej hluav taws xob, vim tias cov yam ntxwv ntawm kev tsis sib haum xeeb cov pob zeb ntsev ua rau nws zoo tagnrho rau siv nyob rau hauv cov khoom siv uas kev them rov qab tau yooj yim.

"Tau ntev, lub zej zog roj teeb tau nrhiav qhov khoom siv anode ua haujlwm ntawm lub peev xwm saum toj no graphite kom muaj kev nyab xeeb, ceev them cov roj teeb lithium-ion. Cov khoom siv no muaj cov kev paub tseem ceeb thiab daim ntawv thov sib txawv,”Ping Liu. "Peb zoo siab rau nws lub peev xwm ua lag luam vim tias cov khoom siv tuaj yeem ua qhov kev daws teeb meem rau kev tsim cov roj teeb lithium-ion."

Hauv txoj kev tshawb nrhiav, cov kws tshawb nrhiav tau pom lub pob zeb tsis haum ntsev anode tuaj yeem thim rov qab ob lub lithium ions ntawm qhov nruab nrab voltage ntawm 0.6 V - siab dua 0.1 V ntawm graphite, tshem tawm lithium hlau plating ntawm tus nqi siab uas ua rau lub roj teeb kev nyab xeeb, tab sis qis dua 1.5 V ntawm qhov uas lithium-titanate intercalates lithium, thiab yog li ntawd khaws cia ntau lub zog. Hauv kev sim lub anode tshiab tau cycled ntau dua 6, 000 npaug nrog qhov peev xwm tsis pom zoo. Nws tuaj yeem them nqi thiab tawm hluav taws xob ceev ceev, xa ntau dua 40 feem pua ntawm nws lub peev xwm hauv 20 vib nas this.

Tus neeg sib tw ntawm postdoctoral Zhuoying Zhu hais tias, "Peb tshawb pom tias Li3V2O5 ua haujlwm ntawm lub tshuab them nyiaj uas sib txawv los ntawm lwm cov khoom siv electrode. Lub lithium ions rov kho lawv tus kheej rau txoj kev uas ua rau muaj qhov hluav taws xob tsawg tsawg thiab muaj kev tiv thaiv lithium sai."

Kev Hloov Hlau Oxides

Cov kws tshawb fawb tau nyiam ntev ntev los ntawm ib pawg ntawm cov hlau oxides uas khaws cov zog ntau dua li qhov theoretically tau. Tam sim no ib pab neeg tshawb fawb thoob ntiaj teb los ntawm University of Texas ntawm Austin, Massachusetts lub koom haum thev naus laus zis, University of Waterloo hauv Canada, Shandong University Suav Teb, Qingdao University, thiab Suav Academy ntawm Kev Tshawb Fawb xav tias lawv tau daws qhov kev tsis pom zoo. Cov kev tshawb fawb, tshaj tawm hauv Xwm Cov Khoom Siv, pom ntau hom hlau sib txuas nrog txog peb lub zog muaj peev xwm txuag hluav taws xob piv nrog cov khoom siv uas niaj hnub no muaj roj teeb lithium-ion.

Guihua Yu, tus kws tshaj lij nyob hauv Walker Department of Mechanical Engineering ntawm lub Tsev Kawm Ntawv Hluav Taws Xob ntawm Cockrell of Engineering hais tias "Tau ze li ob lub xyoo lawm, cov kev tshawb fawb hauv zej zog tau xav tsis meej txog cov kev muaj peev xwm. "Qhov haujlwm no qhia cov pov thawj sim thawj zaug los qhia qhov them nyiaj ntxiv yog khaws lub cev sab hauv cov ntaub ntawv no los ntawm chaw them nyiaj rau lub tshuab."

Ntawm lub taub hau ntawm kev tshawb pom yog kev hloov cov hlau oxides - sib txuas uas muaj cov pa sib xyaw nrog hlau, npib tsib xee, lossis zinc. Lub zog tuaj yeem khaws cia hauv cov hlau oxides thaum tawm tsam cov kev hloov pauv hauv cov qauv siv lead ua uas cov roj ntsha lithium-ion yuav tsum tau khaws lub zog, raws li Science Txhua Hnub.

Cov txheej txheem tseem ceeb hauv txoj kev tshawb fawb no, hu ua hauv situ magnetometry, yog qhov ntsuas lub sijhawm sib nqus ntawm cov khoom siv los soj ntsuam kev hloov ntawm cov khoom hauv cov qauv hluav taws xob sab hauv. Nws muaj peev xwm los txheeb xyuas qhov muaj peev xwm them nyiaj los ntawm kev ntsuas qhov sib txawv ntawm cov khoom sib txawv. Cov txheej txheem no tuaj yeem siv los kawm kev them nqi cia ntawm qhov ntsuas me me - lub peev xwm tsis muaj qhov siv tau los siv ntau cov cuab yeej ua cim. Yu hais tias "Cov txiaj ntsig tau zoo tshaj plaws tau los ntawm cov txheej txheem feem ntau siv los ntawm cov kws kho lub cev tab sis tsis tshua muaj nyob hauv zej zog roj teeb," Yu hais. "Qhov no yog qhov ua tau zoo tshaj plaws ntawm kev sib yuav zoo nkauj ntawm physics thiab electrochemistry."

QuantumScape Mus Rau Pej Xeem

Tag nrho cov kev tshawb fawb saum toj no yog cov khoom theoretical coj qhov chaw sab hauv lub chaw soj nstuam. Lub sijhawm xav tau los ntawm kev tshawb fawb mus rau kev tshaj tawm lag luam yog pom los ntawm QuantumScape, tig tawm los ntawm kev tshawb fawb ntawm Stanford University nrhiav tau los ntawm Jagdeep Singh ib xyoo caum dhau los. Tam sim no kaum xyoo tom qab, lub tuam txhab xav tias nws twb yuav luag tiav rau lub sijhawm prime thiab npaj tswv yim IPO los sau nyiaj kom tau nws thawj cov qauv kev tsim tawm thiab ua haujlwm.

IPO yuav ua tiav los ntawm ib yam dab tsi hu ua kev thim rov qab los ntawm kev siv lub hom phiaj tshwj xeeb muab cov tuam txhab Kensington Capital Acquisition - tus txheej txheem uas txhua tus npau taws ntawm Phab ntsa Street. Nws tau siv tsis ntev los no mus rau pej xeem los ntawm Lordstown Motors, Nikola, thiab Fisker. Canoo tab tom ua nws li IPO tib txoj kev. QuantumScape IPO xav tias yuav sau tau $ 3.3 lab.

Raws li Tech Crunch, lub roj teeb lithium-ion uas yooj yim muaj ob lub electrodes. Muaj qhov anode ntawm ib sab thiab cathode ntawm lwm yam. Ib qho hluav taws xob hauv nruab nrab ua raws li tus neeg xa xov uas txav ions ntawm cov hluav taws xob thaum them thiab tawm. Cov khoom siv hluav taws xob hauv lub xeev tau siv cov roj hluav taws xob tsis txhob siv cov kua lossis gel raws li electrolyte pom hauv cov roj teeb lithium-ion feem ntau. Lub tuam txhab hais tias cov khoom siv hluav taws xob muaj hluav taws xob ntau dua, muaj cov hluav taws xob txhais tau ntau dua los ntawm cov roj teeb me me, sib dua (thiab cia siab tias tsis tshua kim). Cov khoom siv hluav taws xob tseem yuav tsum tau ua kom txo tau qhov hluav taws kub thiab qhov xav tau rau lub tshuab ua kom txias muaj feem xyuam nrog cov roj ntsha lithium-ion.

Yog li feem ntau niaj hnub no peb hnov txog qhov kev xav tsis thoob hauv roj teeb thev naus laus zis uas muaj tsawg dua li vaporware. QuantumScape zoo li yog kev ua lag luam tiag tiag. Tsis muaj txoj cai tsawg dua li JB Straubel, tus thawj tub ceev xwm ntawm Tesla thiab tam sim no tus tsim ntawm Redwood Cov Khoom, ib lub tuam txhab txhim kho txoj hauv kev los rov ua dua cov khoom siv sab hauv cov roj ntsha lithium-ion rau rov siv, hu rau QuantumScape solid state anode-tsawg tsim, "Cov kos duab zoo nkauj tshaj plaws Kuv tau pom dua los ua cov roj teeb lithium-raws roj teeb." Siab qhuas los ntawm ib tug neeg uas yuav tsum paub.