Sisebenzisa amakhukhi ukuthuthukisa ulwazi lwakho.Ngokuqhubeka nokuphequlula leli sayithi, uyavumelana nokusebenzisa kwethu amakhukhi.Ulwazi olwengeziwe.
Njengoba imboni yezimoto zikagesi (EV) ikhula, kanjalo nocwaningo nokuthuthukiswa kwamabhethri e-lithium-ion asezingeni eliphezulu awanika amandla.Ucwaningo nokwanda kobuchwepheshe bokushaja nokukhipha amandla, kanye nokwelula impilo yebhethri, kuyimisebenzi ebalulekile ekuthuthukisweni kwayo.
Izici eziningana, ezifana nezici zesixhumi esibonakalayo se-electrode-electrolyte, i-lithium ion diffusion, kanye ne-electrode porosity, zingasiza ukunqoba lezi zinkinga futhi kufinyelele ukushaja okusheshayo nokuphila okunwetshiwe.
Eminyakeni embalwa edlule, ama-nanomaterials anezinhlangothi ezimbili (2D) (izakhiwo zeshidi ezinogqinsi lwama-nanometer ambalwa) avele njengento engaba khona ye-anode yamabhethri e-lithium-ion.Lawa ma-nanosheet anobuningi besayithi obusebenzayo kanye ne-aspect ratio ephezulu, okufaka isandla ekushajweni okusheshayo nezici ezinhle kakhulu zamabhayisikili.
Ikakhulukazi, ama-nanomaterials anezinhlangothi ezimbili asuselwa ku-transition metal diborides (TDM) ahehe ukunaka komphakathi wesayensi.Ngenxa yezindiza zekhekheba lezinyosi zama-athomu e-boron nezinsimbi eziguqukayo eziningi, ama-TMD abonisa isivinini esikhulu nokuzinza kwesikhathi eside kwemijikelezo yokugcina i-lithium ion.
Njengamanje, ithimba labacwaningi eliholwa nguProfesa Noriyoshi Matsumi we-Japan Advanced Institute of Science and Technology (JAIST) kanye noProf. Kabir Jasuja we-Indian Institute of Technology (IIT) uGandhinagar basebenzela ukuqhubeka nokuhlola ukuthi kungenzeka yini ukugcinwa kwe-TMD.
Iqembu lenze ucwaningo lokuqala lokuhlola ngokugcinwa kwe-titanium diboride (TiB2) ama-hierarchical nanosheets (THNS) njengezinto ze-anode zamabhethri e-lithium-ion.Ithimba lalihlanganisa u-Rajashekar Badam, owayenguMfundisi Omkhulu we-JAIST, u-Koichi Higashimin, Uchwepheshe Wezobuchwepheshe we-JAIST, u-Akash Varma, owayengumfundi othweswe iziqu e-JAIST, kanye noDkt. Asha Lisa James, umfundi we-IIT Gandhinagar.
Imininingwane yocwaningo lwabo ishicilelwe ku-ACS Applied Nano Materials futhi izotholakala ku-inthanethi ngoSepthemba 19, 2022.
I-TGNS yatholwa nge-oxidation ye-TiB2 powder nge-hydrogen peroxide elandelwa yi-centrifugation kanye ne-lyophilization yesisombululo.
Okwenza umsebenzi wethu ugqame ukunwebeka kwezindlela ezithuthukisiwe ukuze kuhlanganiswe lawa ma-nanosheet e-TiB2.Ukuguqula noma iyiphi i-nanomaterial ibe ubuchwepheshe obubambekayo, ukuqina kuyisici esikhawulelayo.Indlela yethu yokwenziwa idinga ukuyaluza kuphela futhi ayidingi imishini eyinkimbinkimbi.Lokhu kungenxa yokuhlakazwa kanye nokuziphatha kabusha kwe-TiB2, okuwukutholakala ngephutha okwenza lo msebenzi ube ibhuloho elithembisayo ukusuka kulebhu ukuya ensimini.
Kamuva, abacwaningi baklama iseli ye-lithium-ion uhhafu ye-anode isebenzisa i-THNS njengento esebenzayo ye-anode futhi baphenya izakhiwo zokushaja ze-anode esekwe ku-THNS.
Abacwaningi bafunde ukuthi i-anode esekwe ku-THNS inamandla okukhipha aphezulu angama-380 mAh/g ekuminyaneni kwamanje okungu-0.025 A/g kuphela.Ngaphezu kwalokho, babone umthamo wokukhipha we-174mAh/g ekumineni okuphezulu kwamanje kwe-1A/g, ukugcinwa komthamo we-89.7%, kanye nesikhathi sokushaja semizuzu eyi-10 ngemuva kwemijikelezo eyi-1000.
Ngaphezu kwalokho, i-lithium-ion anode esekwe ku-THNS ingamelana namaza aphakeme kakhulu, ukusuka ku-15 kuye ku-20 A/g, ihlinzeka ngokushaja okusheshayo cishe ngemizuzwana eyi-9-14.Emisinga ephezulu, ukugcinwa kwamandla kudlula ama-80% ngemva kwemijikelezo engu-10,000.
Imiphumela yalolu cwaningo ibonisa ukuthi ama-nanosheet e-2D TiB2 angamakhandidethi afanelekayo okushaja ngokushesha amabhethri e-lithium-ion empilo ende.Ziphinde zigqamise izinzuzo zezinto ezisetshenziswa ngobuningi be-nanoscale njenge-TiB2 yezindawo ezivumayo ezihlanganisa ikhono elihle kakhulu lejubane eliphezulu, isitoreji sokushaja se-pseudocapacitive nokusebenza okuhle kakhulu kwamabhayisikili.
Lobu buchwepheshe bokushaja ngokushesha bungasheshisa ukuthandwa kwezimoto zikagesi futhi kunciphise kakhulu isikhathi sokulinda sokushaja amadivaysi e-elekthronikhi ahlukahlukene.Sithemba ukuthi imiphumela yethu izogqugquzela ucwaningo olwengeziwe kule ndawo, olungagcina ilethe lula kubasebenzisi be-EV, ukunciphisa ukungcoliswa komoya wasemadolobheni, futhi kunciphise ukucindezeleka okuhambisana nempilo yeselula, ngaleyo ndlela kwandise umkhiqizo womphakathi wethu.
Ithimba lilindele ukuthi lobu buchwepheshe obumangalisayo busetshenziswe ezimotweni zikagesi nezinye izinto zikagesi maduze.
Varma, A., et al.(2022) Ama-nanosheet e-Hierarchical asekelwe ku-titanium diboride njengezisetshenziswa ze-anode zamabhethri e-lithium-ion.Kusetshenziswe nanomaterials ACS.doi.org/10.1021/acsanm.2c03054.
Kule ngxoxo e-Pittcon 2023 e-Philadelphia, PA, sikhulume noDkt. Jeffrey Dick mayelana nomsebenzi wakhe kukhemistri yevolumu ephansi kanye namathuluzi e-nanoelectrochemical.
Lapha, i-AZoNano ixoxa ne-Drigent Acoustics mayelana nezinzuzo igraphene engaziletha kubuchwepheshe be-acoustic kanye ne-audio, nokuthi ubudlelwano benkampani ne-graphene flagship buyimise kanjani impumelelo yayo.
Kule ngxoxo, uBrian Crawford we-KLA uchaza konke okumele ukwazi mayelana ne-nanoindentation, izinselelo zamanje ezibhekene nensimu, nokuthi ungazinqoba kanjani.
I-autosampler entsha ye-AUTOsample-100 iyahambisana ne-benchtop 100 MHz NMR spectrometers.
I-Vistec SB3050-2 iwuhlelo lwesimanjemanje lwe-e-beam lithography olunobuchwepheshe be-beam obugogekayo ukuze kube nezinhlelo eziningi ezisetshenziswayo ocwaningweni nasekuthuthukisweni, ukwenza i-prototyping kanye nokukhiqizwa kwezinga elincane.