Iindlela zokulinga zokulungiselela i-silicon-carbon composites

Ukubunjwa kwe-silicon-cb composite kwavavanywa ngokusebenzisa isisombululo se-plasma processing (SPP). Iziphumo zibonisa ukuba indlela ye-SPP yindlela ebalaseleyo yokulungiselela i-carbon black kunye ne-pore volume volume, medium and micro-layered pore structure. 0-22

“Kwezi zifundo, kusetyenziswe izinyibilikisi ze-organic ezifana ne-benzene ukuvelisa iCB. Nangona kunjalo, kolu cwaningo, sihlolisise ukubunjwa kwezinto ezidibeneyo ngokukhulula i-silicon nanoparticles kwi-solvent ye-organic ngaphambi kokukhutshwa kwe-plasma.

Uvavanyo lwenziwa kubushushu begumbi kunye noxinzelelo. Ukusebenzisa iperi yepensile yomatshini ikhokelela njengee-electrode zokuvela kweplasma, ekubeni uninzi lweengcingo ziyi-plasma sputtering okanye umphunga, kunokucingelwa ukuba kukho ukungcola kwizinto ezidibeneyo.

I-electrode nganye ihlanganiswe ityhubhu ye-ceramic efakwe kwiplagi ye-silicone. Izibini ze-electrodes zifakwe kwi-tube ye-ceramic kwaye zizaliswe ngeeplagi ze-silicon, emva koko i-electrodes ifakwe kwi-beaker enobubanzi be-50 mm kunye nobude be-100 mm (Umfanekiso 1). Umgama phakathi kwee-electrodes ugcinwa kwi-1 mm. I-carbon precursor i-xylene ecocekileyo (i-reagent grade, i-sigma-aldrich), kunye ne-silicon nanopowder (i-particle size = 100nm, i-AlfaAesar) ixutywe ne-xylene. Umbane we-bipolar pulse usetyenziselwa ukuvelisa ukukhutshwa. I-frequency yamandla kunye nobubanzi be-pulse buhlengahlengiswa ukuya kwi-25khz kunye ne-0.5s ngokulandelanayo. Emva kokukhutshwa, ulwelo lokukhutshwa luhluzwa nge-cellophane ukufumana nayiphi na i-compounds eqinile ekhoyo kwisisombululo. Emva koko hluza, kwi-80 degrees Celsius, i-monotonous, ishiya into engumgubo.

Xylene transpiration. Ukuze ufumane i-conductivity entle, yaphathwa kwi-700℃ nge-1h kwisithando sombane esiphantsi kwe-atmosphere ye-N2. Ukuze kuqhutywe uvavanyo lwe-electrochemical yezinto ezidibeneyo ze-silicon-CB, i-silicon-CB yezinto eziphathekayo kunye neqhekeza elikhulu le-80wt% isetyenziswe njengento esebenzayo ye-carbon black slurry ukulungiselela i-anode.

(10 component%; Superp) njengomqhubi, i-polyacrylic acid (PAA; 10%) njengesibophelelo kumanzi adiyiweyo.

Iseli ye-CR2032 yengqekembe ihlanganiswe kwibhokisi yeglavu egcwele i-argon gas, i-2400 Celgard separator, i-lithium foil njenge-electrode ye-counter kunye ne-reference electrode, i-1MLiPF6 njenge-polycarbonate vinyl = i-diethyl carbonate (EC = DEC) (1: 1 umthamo). Sebenzisa i-10% ye-fluorinated ethylene carbonate (FEC) njenge-electrolyte. Zonke iiseli zavavanywa ngokuxinwa kwangoku kwe-0.05 ~ 3V kwi-1 ° C (Li = Li +).

[372 mah = g; Ukusebenzisa inkqubo yokufumanisa ibhetri yebhayoloji ye-BCS805, ukutshaja (i-lithium extraction) kunye nokukhupha (i-lithium thrust) kwiqondo lobushushu begumbi.