Ndị injinia na Mahadum California San Diego emepụtala batrị lithium-ion nke na-arụ ọrụ nke ọma n'oge oyi na-ekpo ọkụ ma na-ekpo ọkụ na-ekpo ọkụ, ebe ọ na-ebu nnukwu ume.Ndị nchọpụta ahụ rụzuru ọrụ a site n'ịmepụta electrolyte nke na-abụghị nanị na-agbanwe agbanwe na nke siri ike n'oge okpomọkụ dị iche iche, kamakwa dakọtara na nnukwu ike anode na cathode.
Batrị na-eguzogide okpomọkụA kọwara n'akwụkwọ akụkọ e bipụtara n'izu Julaị 4 na Proceedings of the National Academy of Sciences (PNAS).
Batrị ndị dị otú ahụ nwere ike ikwe ka ụgbọ ala eletrik na ihu igwe oyi na-aga n'ihu n'otu ụgwọ;ha nwekwara ike ibelata mkpa nke sistemu jụrụ oyi iji mee ka ngwugwu batrị ụgbọ ala ghara ikpo ọkụ na ihu igwe dị ọkụ, Zheng Chen, onye prọfesọ nke nanoengineering na UC San Diego Jacobs School of Engineering na onye ode akwụkwọ nke ọmụmụ ahụ kwuru.
"Ị chọrọ ịrụ ọrụ okpomọkụ dị elu na mpaghara ebe okpomọkụ ikuku nwere ike iru ọnụọgụ atọ ma okporo ụzọ na-akawanye ọkụ.N'ime ụgbọ ala eletrik, ngwugwu batrị na-adịkarị n'okpuru ala, dị nso n'okporo ụzọ ndị a na-ekpo ọkụ, "Chen kọwara, onye bụkwa onye otu ngalaba nke UC San Diego Sustainable Power and Energy Center."Ọzọkwa, batrị na-ekpo ọkụ naanị site n'ịgba ọsọ ugbu a n'oge arụ ọrụ.Ọ bụrụ na batrị enweghị ike ịnabata ọkụ a na oke okpomọkụ, arụmọrụ ha ga-emebi ngwa ngwa. "
N'ime ule, batrị ihe akaebe debere 87.5% na 115.9% nke ike ike ha na -40 na 50 C (-40 na 122 F), n'otu n'otu.Ha nwekwara arụmọrụ Coulombic dị elu nke 98.2% na 98.7% na ọnọdụ okpomọkụ ndị a, n'otu n'otu, nke pụtara na batrị nwere ike nweta ụgwọ karịa na mwepu okirikiri tupu ha akwụsị ịrụ ọrụ.
Batrị ndị Chen na ndị ọrụ ibe mepụtara bụ ma oyi na okpomọkụ na-anabata ekele maka electrolyte ha.A na-eme ya site na ngwọta mmiri mmiri nke dibutyl ether jikọtara ya na nnu lithium.Ihe pụrụ iche gbasara dibutyl ether bụ na ụmụ irighiri ihe ya na-ejikọta nke ọma na ion lithium.N'ikwu ya n'ụzọ ọzọ, molekul electrolyte nwere ike ịhapụ ion lithium ngwa ngwa ka batrị na-agba ọsọ.Mmekọrịta molekụla a na-adịghị ike, ndị nchọpụta achọpụtala na nyocha gara aga, na-eme ka arụmọrụ batrị dịkwuo elu na okpomọkụ dị ala.Na mgbakwunye, dibutyl ether nwere ike were ọkụ n'ụzọ dị mfe n'ihi na ọ na-anọ mmiri mmiri na oke okpomọkụ (o nwere ebe na-esi esi nke 141 C, ma ọ bụ 286 F).
Na-eme ka chemistries lithium-sulfur guzosie ike
Ihe pụrụ iche banyere electrolyte a bụ na ọ dakọtara na batrị lithium-sulfur, nke bụ ụdị batrị nwere ike ịchaji nke nwere anode nke nwere lithium metal na cathode nke sulfur mere.Batrị lithium-sulfur bụ akụkụ dị mkpa nke teknụzụ batrị ọgbọ na-abịa n'ihi na ha na-ekwe nkwa njupụta ume dị elu yana ọnụ ala dị ala.Ha nwere ike ịchekwa ihe ruru okpukpu abụọ karịa ike kwa kilogram karịa batrị lithium-ion nke taa - nke a nwere ike okpukpu abụọ nke ụgbọ ala eletrik na-enweghị mmụba ọ bụla na ibu batrị batrị.Ọzọkwa, sọlfọ na-aba ụba ma nwee nsogbu na-esi na ya pụta karịa cobalt e ji mee ihe na batrị lithium-ion batrị omenala.
Mana enwere nsogbu na batrị lithium-sulfur.Ma cathode na anode na-arụ ọrụ nke ọma.Sulfur cathodes na-emeghachi omume nke na ha na-agbaze n'oge ọrụ batrị.Okwu a na-akawanye njọ na oke okpomọkụ.Na lithium metal anodes na-adịkarị mfe ịmepụta ihe ndị yiri agịga a na-akpọ dendrites nke nwere ike ịdụpu akụkụ nke batrị ahụ, na-eme ka ọ ghara ịdị mkpụmkpụ.N'ihi ya, batrị lithium-sulfur na-adịru naanị iri iri nke okirikiri.
Chen kwuru, "Ọ bụrụ na ịchọrọ batrị nwere njupụta ume dị elu, ị ga-achọkarị iji kemistri siri ike na mgbagwoju anya.""Eke dị elu pụtara mmeghachi omume ndị ọzọ na-eme, nke pụtara nkwụsi ike dị ala, nbibi karịa.Ime batrị nwere ike dị elu nke kwụsiri ike bụ ọrụ siri ike n'onwe ya - ịgbalị ime nke a site na oke okpomọkụ na-akawanye njọ."
The dibutyl ether electrolyte mepụtara site UC San Diego otu na-egbochi ndị a okwu, ọbụna na elu na ala okpomọkụ.Batrị ndị ha nwalere nwere ndụ ịnya igwe ogologo karịa batrị lithium-sulfur nkịtị.Chen kwuru, "electrolyte anyị na-enyere aka melite ma akụkụ cathode na akụkụ anode mgbe ọ na-enye ihe omume dị elu na nkwụsi ike nke ihu," Chen kwuru.
Ndị otu ahụ mekwara ka ọ bụrụ sọlfọ cathode ka ọ kwụsie ike site n'ịkwado ya na polymer.Nke a na-egbochi sọlfọ ọzọ ịgbaze n'ime electrolyte.
Nzọụkwụ na-esote gụnyere ịkwalite kemistri batrị, na-ebuli ya ka ọ rụọ ọrụ na ọbụna okpomọkụ dị elu yana ịgbatị ndụ okirikiri.
Akwụkwọ: "Nhọrọ nhọrọ mgbaze maka batrị lithium-sulfur na-eguzogide okpomọkụ."Ndị na-edekọ akwụkwọ gụnyere Guorui Cai, John Holoubek, Mingqian Li, Hongpeng Gao, Yijie Yin, Sicen Yu, Haodong Liu, Tod A. Pascal na Ping Liu, niile na UC San Diego.
Ọrụ a kwadoro site n'onyinye ngalaba ọrụ Early Career site na NASA's Space Technology Research Grant Programme (ECF 80NSSC18K1512), National Science Foundation site na UC San Diego Materials Research Science and Engineering Center (MRSEC, nye DMR-2011924), na Office nke Teknụzụ ụgbọ ala nke Ngalaba Ike US site na Mmemme Nchọpụta Ngwa Batrị dị elu (Battery500 Consortium, nkwekọrịta DE-EE0007764).Emere ọrụ a n'otu akụkụ na San Diego Nanotechnology Infrastructure (SDNI) na UC San Diego, onye so na National Nanotechnology Coordinated Infrastructure, nke National Science Foundation kwadoro (nye ECCS-1542148).
Oge nzipu: Ọgọst-10-2022