Peb siv cov ncuav qab zib los txhim kho koj qhov kev paub.Los ntawm txuas ntxiv mus saib lub vev xaib no, koj pom zoo rau peb siv cov ncuav qab zib.Xav paub ntxiv.
Raws li lub tsheb hluav taws xob (EV) kev lag luam loj hlob, yog li kev tshawb fawb thiab kev loj hlob ntawm cov roj teeb lithium-ion zoo uas muaj zog rau lawv.Kev tshawb nrhiav thiab kev nthuav dav ntawm kev them nyiaj ceev thiab kev tso tawm thev naus laus zis, nrog rau kev txuas ntxiv roj teeb lub neej, yog cov haujlwm tseem ceeb hauv nws txoj kev loj hlob.
Ntau yam, xws li electrode-electrolyte interface yam ntxwv, lithium ion diffusion, thiab electrode porosity, tuaj yeem pab kov yeej cov teeb meem no thiab ua tiav kev them nyiaj sai thiab txuas lub neej ntev.
Ob peb xyoos dhau los, ob-dimensional (2D) nanomaterials (daim ntawv qauv ob peb nanometers tuab) tau tshwm sim los ua cov ntaub ntawv muaj peev xwm anode rau lithium-ion roj teeb.Cov nanosheets muaj lub chaw ua haujlwm siab ntom ntom ntom ntom thiab cov piv txwv siab, uas pab txhawb kom them sai thiab ua kom nrawm dua cycling.
Hauv particular, ob-dimensional nanomaterials raws li kev hloov pauv hlau diborides (TDM) nyiam cov neeg hauv zej zog kev tshawb fawb.Ua tsaug rau cov dav hlau honeycomb ntawm boron atoms thiab ntau yam kev hloov pauv hlau, TMDs nthuav tawm kev kub ceev thiab kev ruaj ntseg ntev ntawm lithium ion cia mus.
Tam sim no, ib pab neeg tshawb fawb coj los ntawm Prof. Noriyoshi Matsumi ntawm Nyiv Advanced Institute of Science thiab Technology (JAIST) thiab Prof. Kabir Jasuja ntawm Indian Institute of Technology (IIT) Gandhinagar tab tom ua haujlwm los tshawb txog qhov ua tau ntawm TMD cia.
Cov pab pawg tau ua thawj qhov kev tshawb fawb txog kev khaws cia ntawm titanium diboride (TiB2) hierarchical nanosheets (THNS) ua cov khoom siv anode rau lithium-ion roj teeb.Pab neeg no suav nrog Rajashekar Badam, yav dhau los JAIST Senior Lecturer, Koichi Higashimin, JAIST Technical Expert, Akash Varma, yav tas los JAIST kawm tiav, thiab Dr. Asha Lisa James, IIT Gandhinagar tub ntxhais kawm.
Cov ntsiab lus ntawm lawv cov kev tshawb fawb tau luam tawm hauv ACS Applied Nano Materials thiab yuav muaj nyob online rau lub Cuaj Hlis 19, 2022.
TGNS tau txais los ntawm oxidation ntawm TiB2 hmoov nrog hydrogen peroxide tom qab centrifugation thiab lyophilization ntawm cov tshuaj.
Dab tsi ua rau peb txoj haujlwm sawv cev yog qhov kev nthuav dav ntawm cov txheej txheem tsim los ua ke cov TiB2 nanosheets.Txhawm rau tig ib qho nanomaterial rau hauv cov cuab yeej siv tau yooj yim, scalability yog qhov txwv.Peb cov txheej txheem hluavtaws tsuas yog xav kom muaj kev ntxhov siab thiab tsis xav tau cov cuab yeej ntse.Qhov no yog vim qhov kev sib cais thiab recrystallization tus cwj pwm ntawm TiB2, uas yog qhov kev tshawb pom tsis zoo uas ua rau txoj haujlwm no yog ib qho kev cog lus txuas ntxiv los ntawm lub chaw sim mus rau thaj chaw.
Tom qab ntawd, cov kws tshawb fawb tau tsim cov anode lithium-ion ib nrab ntawm tes siv THNS ua cov khoom siv anode thiab tshawb xyuas cov nqi khaws cia ntawm THNS-based anode.
Cov kws tshawb fawb tau kawm tias THNS-raws li anode muaj qhov tso tawm siab ntawm 380 mAh / g ntawm qhov ceev tam sim no tsuas yog 0.025 A / g.Tsis tas li ntawd, lawv tau pom lub peev xwm tawm ntawm 174mAh / g ntawm qhov ceev tam sim no ntawm 1A / g, muaj peev xwm tuav tau ntawm 89.7%, thiab lub sijhawm them nqi ntawm 10 feeb tom qab 1000 cycles.
Tsis tas li ntawd, THNS-based lithium-ion anodes tuaj yeem tiv taus cov tam sim no siab heev, txij li 15 txog 20 A / g, muab kev them nyiaj ceev ceev hauv li 9-14 vib nas this.Ntawm cov dej ntws siab, muaj peev xwm tuav tau tshaj 80% tom qab 10,000 cycles.
Cov txiaj ntsig ntawm txoj kev tshawb fawb no qhia tau tias 2D TiB2 nanosheets yog cov neeg sib tw tsim nyog rau kev them nyiaj sai rau lub neej ntev lithium-ion roj teeb.Lawv kuj tseem qhia txog cov txiaj ntsig ntawm cov khoom siv nanoscale xws li TiB2 rau cov khoom muaj txiaj ntsig nrog rau kev muaj peev xwm ceev ceev, pseudocapacitive nqi cia thiab kev ua haujlwm zoo heev.
Qhov kev them nyiaj ceev ceev no tuaj yeem ua kom nrov nrov ntawm lub tsheb hluav taws xob thiab txo lub sijhawm tos kom them ntau yam khoom siv hluav taws xob.Peb cia siab tias peb cov txiaj ntsig yuav txhawb nqa kev tshawb fawb ntxiv hauv cheeb tsam no, uas tuaj yeem ua kom yooj yim rau cov neeg siv EV, txo cov pa phem hauv nroog, thiab txo cov kev ntxhov siab cuam tshuam nrog lub neej txawb, yog li ua kom muaj txiaj ntsig ntawm peb lub neej.
Pab neeg no cia siab tias cov cuab yeej zoo kawg no yuav siv rau hauv tsheb fais fab thiab lwm yam khoom siv hluav taws xob sai sai.
Varma, A., et al.(2022) Hierarchical nanosheets raws li titanium diboride ua anode cov ntaub ntawv rau lithium-ion roj teeb.Applied nanomaterials ACS.doi.org/10.1021/acsanm.2c03054.
Hauv kev xam phaj no ntawm Pittcon 2023 hauv Philadelphia, PA, peb tau tham nrog Dr. Jeffrey Dick txog nws txoj haujlwm hauv cov khoom siv hluav taws xob tsawg thiab cov cuab yeej nanoelectrochemical.
Ntawm no, AZoNano tham nrog Drigent Acoustics txog cov txiaj ntsig ntawm graphene tuaj yeem coj mus rau acoustic thiab audio technology, thiab seb lub tuam txhab kev sib raug zoo nrog nws cov graphene flagship tau zoo li cas.
Hauv kev xam phaj no, KLA's Brian Crawford piav qhia txhua yam uas yuav tsum paub txog nanoindentation, cov teeb meem tam sim no ntsib hauv cheeb tsam, thiab yuav ua li cas kov yeej lawv.
Tus tshiab AUTOsample-100 autosampler yog sib xws nrog benchtop 100 MHz NMR spectrometers.
Vistec SB3050-2 yog lub xeev-ntawm-the-art e-beam lithography system nrog deformable beam tshuab rau ntau yam kev siv hauv kev tshawb fawb thiab kev tsim kho, kev tsim qauv thiab kev tsim khoom me me.