Izindlela zokuhlola zokulungiselela izinhlanganisela ze-silicon-carbon

Ukwakheka kwenhlanganisela ye-silicon-cb kwahlolwa kusetshenziswa isixazululo se-plasma processing (SPP). Imiphumela ibonisa ukuthi indlela ye-SPP iyindlela enhle kakhulu yokulungiselela i-carbon black enevolumu ephezulu ye-pore, isakhiwo se-pore esiphakathi nendawo kanye ne-micro-layered. 0-22

“Kulezi zifundo, kwasetshenziswa kuphela izinyibilikisi ze-organic ezifana ne-benzene ukukhiqiza i-CB. Kodwa-ke, kulolu cwaningo, sihlole ukwakheka kwezinto ezihlanganisiwe ngokuphumuza ama-silicon nanoparticles ku-solvent ephilayo ngaphambi kokukhishwa kwe-plasma.

Ukuhlolwa kwenziwa ngezinga lokushisa legumbi kanye nokucindezela. Ukusebenzisa ipheya yepensela eyimishini ihola njengama-electrode okuvela kwe-plasma, njengoba izintambo eziningi ziyi-plasma sputtering noma umhwamuko, kungacatshangwa ukuthi kukhona ukungcola ezintweni eziyinhlanganisela.

I-electrode ngayinye imbozwe ngeshubhu le-ceramic elifakwa kupulaki ye-silicone. Ipheya lama-electrode apakishwa kushubhu ye-ceramic futhi agcwaliswe ngamapulaki e-silicon, bese ama-electrode afakwa kubhekhani enobubanzi obungu-50 mm nobude obuyi-100 mm (Umfanekiso 1). Ibanga phakathi kwama-electrode ligcinwa ku-1 mm. I-carbon precursor iyi-xylene ehlanzekile (ibanga le-reagent, i-sigma-aldrich), kanye ne-silicon nanopowder (usayizi wezinhlayiyana ezilinganayo=100nm, i-AlfaAesar) ixutshwe nexylene. I-bipolar pulse power supply isetshenziselwa ukukhiqiza ukukhishwa. Imvamisa yamandla nobubanzi be-pulse bulungiswa ukuze bube ngu-25khz no-0.5s ngokulandelana. Ngemuva kokukhishwa, uketshezi olukhiphayo luhlungwa nge-cellophane ukuthola noma yiziphi izinhlanganisela eziqinile ezikhona kwisixazululo. Bese uhlunga, ku-80 degrees Celsius, i-monotonous, ishiya into eyimpuphu.

Ukuphefumula kwe-Xylene. Ukuze kutholwe i-conductivity enhle, yaphathwa ku-700℃ ihora elingu-1 esithandweni sikagesi esingaphansi komkhathi we-N2. Ukuze kwenziwe ukuhlolwa kwe-electrochemical kwezinto eziyinhlanganisela ye-silicon-CB, into eyinhlanganisela ye-silicon-CB enengxenye enkulu engu-80wt% isetshenziswe njengento esebenzayo ikhabhoni emnyama slurry ukuze kulungiswe i-anode.

(Ingxenye engu-10%; Superp) njengomqhubi, i-polyacrylic acid (PAA; 10%) njengesibophelelo emanzini acwecwe.

I-CR2032 coin cell ihlanganiswe ebhokisini legilavu ​​eligcwele i-argon gas, isihlukanisi se-Celgard esingu-2400, i-lithium foil njenge-electrode ephikisayo ne-reference electrode, 1MLiPF6 njenge-polycarbonate vinyl = i-diethyl carbonate (EC=DEC) (ivolumu engu-1:1). Sebenzisa u-10% we-fluorinated ethylene carbonate (FEC) njenge-electrolyte. Wonke amaseli ahlolwe ngokuminyana kwamanje okungu-0.05 ~ 3V ku-1°C (Li=Li+).

[372 mah = g; Kusetshenziswa isistimu yokuthola ibhethri ye-BCS805 yebhayoloji, ukushaja (ukukhishwa kwe-lithium) nokukhipha (i-lithium thrust) ezingeni lokushisa legumbi.