Method For Preparing Electrode Material, Electrode Material, And Battery
AssigneeHuawei Technologies Co., Ltd.
InventorsZhexun YU, Yangxing LI
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Abstract
A method for preparing an electrode material, an electrode material, and a battery are provided to resolve a prior-art problem that a silicon negative electrode material in a battery is prone to pulverization in a fully intercalated state. The electrode material includes a layered silicon core and graphene quantum dots. The layered silicon core includes at least two layers of silicon-based materials, an interlayer gap exists between two neighboring layers of the at least two layers of silicon-based materials, and the silicon-based material includes at least one of silicon or an oxide of silicon. The graphene quantum dots are located in the interlayer gap between the at least two layers of silicon-based materials.
Claims16
An electrode material, comprising:
- a layered silicon core, wherein the layered silicon core comprises at least two layers of silicon-based materials, an interlayer gap exists between two neighboring layers of the at least two layers of silicon-based materials, and the silicon-based materials comprise at least one of silicon or an oxide of silicon;
- and
- graphene quantum dots, located in the interlayer gap between the at least two layers of silicon-based materials.
An electrode material, comprising:
- a layered silicon core, wherein the layered silicon core comprises at least two layers of silicon-based materials, an interlayer gap exists between two neighboring layers of the at least two layers of silicon-based materials, and the silicon-based materials comprise at least one of silicon or an oxide of silicon;
- and
- graphene quantum dots, located on an outer surface of the layered silicon core.
A method for preparing an electrode material, comprising:
- making a metal silicide react with a metal removal agent, to generate a layered silicon core from which metal is removed, wherein the layered silicon core comprises at least two layers of silicon-based materials, an interlayer gap exists between two neighboring layers of the at least two layers of silicon-based materials, and the silicon-based materials comprise at least one of silicon or an oxide of silicon;
- and
- assembling graphene quantum dots in the interlayer gap of the layered silicon core.
A method for preparing an electrode material, comprising:
- making a metal silicide react with a metal removal agent, to generate a layered silicon core from which metal is removed, wherein the layered silicon core comprises at least two layers of silicon-based materials, an interlayer gap exists between two neighboring layers of the at least two layers of silicon-based materials, and the silicon-based materials comprise at least one of silicon or an oxide of silicon;
- and
- assembling graphene quantum dots on an outer surface of the layered silicon core.
A battery, comprising a positive electrode, an electrolyte, and a negative electrode, wherein the negative electrode is prepared based on an electrode material that comprises:
- a layered silicon core, wherein the layered silicon core comprises at least two layers of silicon-based materials, an interlayer gap exists between two neighboring layers of the at least two layers of silicon-based materials, and the silicon-based materials comprise at least one of silicon or an oxide of silicon;
- and
- graphene quantum dots, located in the interlayer gap between the at least two layers of silicon-based materials.
Dependencies are inferred from the claim text.