Selokhu kwenziwa izimboni zamabhethri e-lithium-ion ngo-1991, i-graphite ibe yinto ehamba phambili ye-electrode engalungile yamabhethri.I-Lithium titanate, njengohlobo olusha lwempahla ye-electrode engalungile yamabhethri e-lithium-ion, yathola ukunakwa ngasekupheleni kwawo-1990 ngenxa yokusebenza kwayo okuhle kakhulu.Isibonelo, izinto ze-lithium titanate zingagcina izinga eliphezulu lokuzinza esakhiweni sazo se-crystal ngesikhathi sokufakwa nokususwa kwe-lithium ion, ngezinguquko ezincane kuma-lattice constants (ukuguqulwa kwevolumu
Lokhu "ziro strain" impahla ye-electrode inweba kakhulu impilo yomjikelezo wamabhethri e-lithium titanate.I-Lithium titanate inesiteshi sokusabalalisa i-lithium ion esinezinhlangothi ezintathu esiyingqayizivele esinesakhiwo se-spinel, esinezinzuzo ezifana nezici ezinhle kakhulu zamandla nokusebenza okuhle kakhulu kokushisa okuphezulu nokuphansi.Uma kuqhathaniswa nezinto ezisetshenziswa yi-carbon negative electrode, i-lithium titanate inamandla amakhulu (1.55V ephakeme kune-metallic lithium), okuholela ekutheni ungqimba oluqinile oluwuketshezi oluvame ukukhuliswa phezu kwe-electrolyte ne-carbon negative electrode lungabuki phezu kwe-lithium titanate. .
Okubaluleke nakakhulu, kunzima ukuthi i-lithium dendrite yakheke phezu kwe-lithium titanate ngaphakathi kwebanga le-voltage lokusetshenziswa kwebhethri okuvamile.Lokhu kuqeda kakhulu amathuba okuba namasekethe amafushane akhiwe yi-lithium dendrites ngaphakathi kwebhethri.Ngakho-ke ukuphepha kwamabhethri e-lithium-ion ane-lithium titanate njengoba i-electrode engalungile okwamanje iphakeme kakhulu phakathi kwazo zonke izinhlobo zamabhethri e-lithium-ion umbhali azibonile.
Iningi labangaphakathi embonini lizwile ukuthi impilo yomjikelezo webhethri ye-lithium ye-lithium titanate esikhundleni se-graphite njengoba impahla ye-electrode engalungile ingafinyelela amashumi ezinkulungwane zezikhathi, ephakeme kakhulu kunebhethri evamile ye-lithium-ion yendabuko, futhi izofa ngemva kwemijikelezo eyizinkulungwane ezimbalwa kuphela. .
Ngenxa yokuthi iningi lochwepheshe bebhethri ye-lithium-ion abakaze baqale ngempela ukwenza imikhiqizo yebhethri ye-lithium titanate, noma bayenze izikhathi ezimbalwa kuphela futhi bagcina ngokuxhamazela lapho behlangabezana nobunzima.Ngakho-ke abakwazanga ukuzola futhi bacabange ngokucophelela ngokuthi kungani amabhethri e-lithium-ion enziwe kahle ekwazi ukuqeda isikhathi sempilo esingu-1000-2000 wokushaja nokukhipha imijikelezo?
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Ingabe isizathu esiyisisekelo sokuphila komjikelezo omfushane wamabhethri e-lithium-ion endabuko ngenxa yezingxenye zawo eziyisisekelo - umthwalo onamahloni we-graphite negative electrode?Uma i-electrode eyi-graphite negative ithathelwa indawo yi-spinel yohlobo lwe-lithium titanate negative electrode, uhlelo lwamakhemikhali ebhethri ye-lithium-ion olufana ngokuyisisekelo lungaqhutshwa ngamabhayisikili amashumi ezinkulungwane noma ngisho namakhulu ezinkulungwane zezikhathi.
Ukwengeza, lapho abantu abaningi bekhuluma ngomthamo ophansi wamandla wamabhethri e-lithium titanate, bashaya indiva iqiniso elilula kodwa elibalulekile: impilo yomjikelezo omude kakhulu, ukuphepha okungavamile, izici ezinhle kakhulu zamandla, nomnotho omuhle wamabhethri e-lithium titanate.Lezi zici zizoba yisisekelo esibalulekile sembonini yokugcina amandla ye-lithium-ion esakhulayo.
Kule minyaka eyishumi edlule noma ngaphezulu, ucwaningo ngobuchwepheshe bebhethri ye-lithium titanate beludlondlobala ngaphakathi nangaphandle.Iketanga layo lezimboni lingahlukaniswa ekulungiseleleni izinto ze-lithium titanate, ukukhiqizwa kwamabhethri e-lithium titanate, ukuhlanganiswa kwezinhlelo zebhethri ze-lithium titanate, kanye nezicelo zabo ezimakethe zezimoto zikagesi nezokugcina amandla.
1. Izinto ze-lithium titanate
Emazweni omhlaba, kunezinkampani ezihamba phambili ocwaningweni nasekuthuthukisweni kwezimboni ze-lithium titanate, njenge-Oti Nanotechnology yase-United States, i-Ishihara Industries yase-Japan, kanye no-Johnson&Johnson yase-United Kingdom.Phakathi kwazo, impahla ye-lithium titanate ekhiqizwa i-titanium yaseMelika inokusebenza okuhle kakhulu ngokwezinga, ukuphepha, impilo ende yenkonzo, namazinga okushisa aphezulu naphansi.Kodwa-ke, ngenxa yezindlela zokukhiqiza ezinde kakhulu nezinembayo, izindleko zokukhiqiza ziphezulu kakhulu, okwenza kube nzima ukuthengisa nokukhuthaza.
Isikhathi sokuthumela: Mar-14-2024