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AssigneesCBBS, Co., Ltd., University of Ulsan Foundation for Industry Cooperation
InventorsChan Byon, Jiwon JUNG
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A method of preparing a silicon/graphene composite anode material, includes spray drying and then heat treating an aqueous graphene oxide solution, reduced graphene oxide powder, commercial carbon sources, polymers including salts and silicates, water-soluble polymers, and silicon metal particles, the aqueous graphene oxide solution being prepared by a modified Hummer's method and reduced graphene oxide powder being prepared by drying and reducing the aqueous solution. The anode material is advantageous in suppressing the high volume expansion during charging and discharging of the anode material and the resultant micronization of silicon and excessive formation of a solid electrolyte interphase (SEI) on the surface of the anode material. Not only that, the anode material enables the stable operation of secondary batteries based on silicon anode materials and at the same time can exhibit the high capacitance inherent to silicon.
A method of preparing a silicon/graphene composite anode material, the method comprising:
A silicon/graphene composite anode material having a core-shell structure, wherein the core is made of silicon metal particles and the shell is made of graphene.
Dependencies are inferred from the claim text.