Cov kev sim rau kev npaj silicon-carbon composites

Qhov sib xyaw ntawm silicon-cb composite tau sim siv cov tshuaj plasma processing (SPP). Cov txiaj ntsig tau pom tias txoj kev SPP yog ib txoj hauv kev zoo tshaj plaws rau kev npaj cov pa roj carbon dub nrog lub siab pore ntim, nruab nrab thiab micro-txheej pore qauv. 0-22

“Hauv cov kev tshawb fawb no, tsuas yog cov kuab tshuaj organic xws li benzene tau siv los tsim CB. Txawm li cas los xij, hauv txoj kev tshawb no, peb tau tshuaj xyuas qhov sib xyaw ntawm cov khoom sib xyaw los ntawm kev so cov silicon nanoparticles hauv cov kuab tshuaj organic ua ntej tso ntshav plasma.

Qhov kev sim tau ua nyob rau hauv chav tsev kub thiab siab. Siv ib khub ntawm cov cwj mem hluav taws xob ua cov electrodes rau ntshav plasma tshwm sim, vim feem ntau ntawm cov xov hlau yog plasma sputtering lossis vapor, nws tuaj yeem xav tias muaj impurities hauv cov khoom sib xyaw.

Txhua electrode yog them nrog ib tug ceramic raj uas yog muab tso rau hauv ib tug silicone plug. Ib nkawm electrodes yog ntim rau hauv ib lub raj ceramic thiab ntim nrog silicon plugs, thiab tom qab ntawd cov electrodes tau muab tso rau hauv lub beaker nrog ib txoj kab uas hla ntawm 50 hli thiab qhov siab ntawm 100 hli (Daim duab 1). Qhov kev ncua deb ntawm cov electrodes yog tswj ntawm 1 mm. Cov pa roj carbon precursor yog xylene ntshiab (qib reagent, sigma-aldrich), thiab silicon nanopowder (uniform particle loj = 100nm, AlfaAesar) yog tov nrog xylene. Lub tshuab hluav taws xob bipolar pulse yog siv los tsim tawm. Lub zog zaus thiab mem tes dav tau hloov kho rau 25khz thiab 0.5s raws li. Tom qab tso tawm, cov kua paug tawm yog lim los ntawm cellophane kom tau txais cov khoom sib txuas uas muaj nyob hauv cov tshuaj. Tom qab ntawd lim, ntawm 80 degrees Celsius, nws yog monotonous, tawm hauv cov hmoov nplej.

Xylene transpiration. Txhawm rau kom tau txais txiaj ntsig zoo, nws raug kho ntawm 700 ℃ rau 1h hauv qhov cub hluav taws xob hauv qab N2 huab cua. Txhawm rau ua qhov kev ntsuam xyuas electrochemical ntawm silicon-CB cov khoom siv sib xyaw, silicon-CB cov khoom sib xyaw nrog ib feem ntawm 80wt% tau siv los ua cov khoom siv roj carbon dub slurry los npaj cov anode.

(10 tivthaiv%; Superp) ua tus neeg xyuas pib, polyacrylic acid (PAA; 10%) raws li kev sib khi hauv dej distilled.

CR2032 npib ntawm tes yog sib sau ua ke hauv lub hnab looj tes uas muaj roj argon, 2400 Celgard cais, lithium ntawv ci raws li lub txee electrode thiab siv electrode, 1MLiPF6 li polycarbonate vinyl = diethyl carbonate (EC = DEC) (1: 1 ntim). Siv 10% fluorinated ethylene carbonate (FEC) ua cov electrolyte. Txhua lub hlwb raug kuaj ntawm qhov ceev tam sim no ntawm 0.05 ~ 3V ntawm 1 ° C (Li = Li +).

[372 mh = g; Siv cov khoom siv roj ntsha BCS805 kuaj pom, them nyiaj (lithium rho tawm) thiab tso tawm (lithium thrust) ntawm chav tsev kub.