Mbido / blog / Ndị injinia ewepụtala ihe nkewa nke na-eme ka electrolytes gaseous guzosie ike iji mee ka batrị okpomọkụ dị ala dị ala karịa.

Ndị injinia ewepụtala ihe nkewa nke na-eme ka electrolytes gaseous guzosie ike iji mee ka batrị okpomọkụ dị ala dị ala karịa.

20 Ọkt, 2021

By hoppt

Dị ka akụkọ mgbasa ozi si mba ọzọ si kwuo, ndị injinia nano na Mahadum California San Diego emepụtala ihe nkesa batrị nke nwere ike ime ihe dị ka ihe mgbochi n'etiti cathode na anode iji gbochie ikuku electrolyte dị na batrị site na vaporizing. Ọhụrụ diaphragm na-egbochi nrụgide dị n'ime nke oké ifufe ahụ ịgbakọta, si otú a na-egbochi batrị ka ọ gbasaa na ịgbawa.

Onye ndu nyocha, Zheng Chen, prọfesọ nke nanoengineering na Jacobs School of Engineering na Mahadum California, San Diego, kwuru, sị: "Site na ọnyà ụmụ irighiri gas, akpụkpọ ahụ nwere ike ime dị ka ihe nkwụnye maka electrolytes na-agbanwe agbanwe."

Ihe nkewa ọhụrụ ahụ nwere ike melite arụmọrụ batrị na oke okpomọkụ dị ala. Igwe batrị na-eji diaphragm nwere ike ịrụ ọrụ na mwepu 40ºC, ike ya nwere ike iru 500 milliampere awa kwa gram, ebe batrị diaphragm azụmahịa nwere ihe fọrọ nke nta ka ọ bụrụ efu efu na nke a. Ndị nchọpụta na-ekwu na ọ bụrụgodị na a naghị eji ya eme ihe ruo ọnwa abụọ, ikike batrị ka dị elu. Omume a na-egosi na diaphragm nwekwara ike ịgbatị ndụ nchekwa. Nchọpụta a na-enye ndị na-eme nchọpụta ohere imezu ihe mgbaru ọsọ ha n'ihu: ịmepụta batrị ndị nwere ike inye ọkụ eletrik maka ụgbọ ala na gburugburu oyi, dị ka ụgbọ elu, satellites, na ụgbọ mmiri miri emi.

Nchọpụta a dabere na nyocha na ụlọ nyocha nke Ying Shirley Meng, prọfesọ nke nanoengineering na Mahadum California, San Diego. Nchọpụta a na-eji otu gas electrolyte na-emepụta batrị nke nwere ike ịnọgide na-arụ ọrụ nke ọma na gburugburu ebe obibi na-ebelata 60ºC maka oge mbụ. N'ime ha, gas electrolyte na-ekpo ọkụ bụ gas nke a na-agbanye site n'itinye nrụgide ma na-eguzogide ọgwụ na obere okpomọkụ karịa omenala mmiri mmiri electrolytes.

Ma ụdị electrolyte a nwere ntụpọ; ọ dị mfe ịgbanwe site na mmiri mmiri gaa gas. Chen kwuru, sị: "Nsogbu a bụ nnukwu nsogbu nchekwa maka electrolyte a." Ekwesịrị ịbawanye nrụgide ahụ iji kpochie ụmụ irighiri mmiri mmiri ma debe electrolyte na ọnọdụ mmiri mmiri iji jiri electrolyte.

Ụlọ nyocha Chen jikọrọ aka na Meng na Tod Pascal, prọfesọ nke nanoengineering na Mahadum California, San Diego, iji dozie nsogbu a. Site na ijikọta nka ọkachamara nke kọmpụta dị ka Pascal na ndị na-eme nchọpụta dị ka Chen na Meng, e mepụtara usoro iji mee ka mmiri na-ekpo ọkụ na-ekpo ọkụ na-enweghị itinye nrụgide ngwa ngwa. Ndị ọrụ ahụ a kpọtụrụ aha n'elu jikọtara ya na Sayensị Nchọpụta Ihe Na-ahụ Maka Ihe na Injinịa (MRSEC) nke Mahadum California, San Diego.

Usoro a na-enweta site na ihe anụ ahụ nke ụmụ irighiri gas na-agbakọta na mberede mgbe ha tọrọ atọ n'obere oghere nano. A na-akpọ ihe omume a capillary condensation, nke nwere ike ime ka gas ghọọ mmiri mmiri na nrụgide dị ala. Ndị otu nyocha ahụ jiri ihe a wuo ihe nkesa batrị nke nwere ike ime ka electrolyte kwụsie ike na batrị ultra-obere okpomọkụ, ikuku gas electrolyte nke sitere na fluoromethane gas. Ndị nchọpụta ahụ jiri ihe kristal porous a na-akpọ metal-organic framework (MOF) mepụta akpụkpọ ahụ. Ihe pụrụ iche gbasara MOF bụ na o juputara na obere pores, nke nwere ike ijide ụmụ irighiri gas fluoromethane ma kpoo ha na nrụgide dị ala. Dịka ọmụmaatụ, fluoromethane na-agbadakarị na mwepu 30 Celsius ma nwee ike nke 118 psi; ma ọ bụrụ na a na-eji MOF eme ihe, nrụgide condensation nke porous n'otu okpomọkụ bụ nanị 11 psi.

Chen kwuru, sị: "MOF a na-ebelata oke nrụgide achọrọ maka electrolyte na-arụ ọrụ. Ya mere, batrị anyị nwere ike inye nnukwu ikike na obere okpomọkụ na-enweghị mmebi." Ndị nyocha ahụ nwalere ihe nkesa dabere na MOF na batrị lithium-ion. . Batrị lithium-ion nwere fluorocarbon cathode na lithium metal anode. Ọ nwere ike mejupụta ya na fluoromethane electrolyte gaseous na nrụgide dị n'ime nke 70 psi, dị nnọọ ala karịa nrụgide achọrọ maka liquefying fluoromethane. Batrị ahụ ka nwere ike idowe 57% nke ike ime ụlọ ya na mwepu 40°C. N'ụzọ dị iche, n'otu ọnọdụ okpomọkụ na nrụgide, ike batrị diaphragm azụmahịa na-eji gas electrolyte nwere fluoromethane fọrọ nke nta ka ọ bụrụ efu.

The micropores dabeere na MOF separator bụ isi n'ihi na ndị a micropores nwere ike na-eme ka ndị ọzọ electrolytes eruba na batrị ọbụna n'okpuru mbelata nrụgide. Diaphragm azụmahịa nwere nnukwu pores na enweghị ike idogide ụmụ irighiri ikuku electrolyte gaseous n'okpuru nrụgide belatara. Mana microporosity abụghị naanị ihe kpatara diaphragm ji arụ ọrụ nke ọma n'okpuru ọnọdụ ndị a. Igwe diaphragm nke ndị nyocha ahụ mere na-enye ohere ka oghere ndị ahụ na-etolite ụzọ na-aga n'ihu site n'otu nsọtụ ruo na nke ọzọ, si otú ahụ hụ na ion lithium nwere ike na-asọfe n'efu site na diaphragm. N'ime ule ahụ, ionic conductivity nke batrị na-eji diaphragm ọhụrụ na mwepu 40 Celsius bụ okpukpu iri karịa batrị na-eji diaphragm azụmahịa.

Ndị otu Chen na-anwale ihe nkesa dabere na MOF na electrolytes ndị ọzọ. Chen kwuru, sị: "Anyị ahụla mmetụta ndị yiri ya. Site n'iji MOF a dị ka ihe nkwụnye ọkụ, enwere ike ịkwado mkpụrụ ndụ electrolyte dị iche iche iji melite nchekwa batrị, gụnyere batrị lithium omenala na electrolytes na-agbanwe agbanwe."

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