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AssigneeKabushiki Kaisha Toyota Jidoshokki
InventorsTakeshi KONDO, Yusuke SUGIYAMA, Nobuhiro GODA, Mutsumi TAKAHASHI, Takashi MOHRI, Tomohiro NIIMI, Tomokuni ABE, Hirotaka SONE, Atsushi SAITO, Akihiro SAEKI
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A production process for carbon-coated silicon material includes the steps of: a lamellar-silicon-compound production step of reacting CaSi2 with an acid to turn the CaSi2 into a lamellar silicon compound; a silicon-material production step of heating the lamellar silicon compound at 300° C. or more to turn the lamellar silicon compound into a silicon material; a coating step of coating the silicon material with carbon; and a washing step of washing the silicon material, or another silicon material undergone the coating step, with a solvent of which the relative permittivity is 5 or more.
A production process for carbon-coated silicon material, the production process comprising the steps of:
A carbon-coated silicon material exhibiting a halogen-ion concentration of 50 ppm or less in water when one gram of the carbon-coated silicon material is stirred in 10-g water for one hour.
Dependencies are inferred from the claim text.