Silicon cathodes na-eme ka mkpụrụ ndụ Li-S kwụsie ike. Mmetụta: karịa okirikiri chaja 2 kama ọtụtụ iri na abuo
Ndị ọkà mmụta sayensị sitere na Daegu Institute of Science and Technology (DGIST, South Korea) emepụtala cathode dabeere na silicon nke a na-atụ anya na ọ ga-eguzogide ihe karịrị 2 chaja cycles na sel Li-S. Mkpụrụ ndụ lithium-ion kpochapụwo na-eji silicon dị ọcha na anodes iji kwado ma jiri nwayọọ nwayọọ dochie graphite. A na-eji silicon oxide mee ihe ebe a, a na-ejikwa silicon dioxide mee ihe na cathode.
Li-S cell = lithium anode, silicon dioxide cathode nwere sọlfọ
A na-ahụta mkpụrụ ndụ Li-S na-adọrọ mmasị n'ihi njupụta ike ha dị elu, ịdị arọ na ọnụ ahịa nrụpụta dị ala. Agbanyeghị, ọnwebeghị onye jisiri ike mepụta ụdị nke ga-anagide okirikiri chaja karịrị iri na abuo. Ihe niile sitere na lithium polysulfides (LiPS), nke na-agbaze na electrolyte n'oge a na-ahapụ ya ma meghachi omume na anode, na-ebelata ikike ya na, n'ihi ya, na-ebibi batrị ahụ.
O kwere omume na ndị nchọpụta South Korea achọpụtala ihe ngwọta maka nsogbu ahụ. Kama ihe ndị sitere na carbon (dị ka graphite), ha ji cathode mee ihe. Ọdịdị lamellar nke mesoporous silica (POMS).
Ọdịdị nke lamellar bụ ihe kwere nghọta, ebe mesoporosity na-ezo aka na nchịkọta nke pores (cavities) na silica nke nwere nha anya, njupụta mpaghara na obere mgbasa ozi (isi iyi). Nke a dị ka ịgafe efere n'akụkụ ụfọdụ ụdị silicate kwa oge iji mee sieve.
Ndị ọkà mmụta sayensị DGIST jiri oghere ndị a tinye sọlfọ n'ime ha (Ọnụ ọgụgụ a). N'oge mwepu, sọlfọ na-agbaze wee mepụta lithium polysulfides (LiPS) na lithium. Ya mere, ụgwọ ahụ na-aga, mana LiPS na-anọgide na-adọrọ mmasị na nso cathode n'ihi ihe mgbakwunye carbon na-akọwaghị (nhazi ojii, ọnụ ọgụgụ b).
N'oge ịchaji, LiPS na-ewepụta lithium, nke eweghachiri na lithium anode. N'aka nke ọzọ, sọlfọ na-agbanwe ka silica. Enweghị mgbapụ LiPS na anode, enweghị mmebi ọla.
Batrị Li-S nke emepụtara n'ụzọ dị otu a na-ejigide ikike dị elu na nkwụsi ike maka ihe karịrị okirikiri ọrụ abụọ. Ọ dịkarịa ala 2-500 cycles nke ọrụ ka a na-ewere dị ka ọkọlọtọ maka sel Li-ion kpochapụwo, ọ bụ ezie na ekwesịrị ịgbakwunye na sel lithium-ion nke a na-ahazi nke ọma nwere ike idi ọtụtụ puku okirikiri.
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