Anodes including mesoporous hollow silicon particles and a method for synthesizing mesoporous hollow silicon particles
AssigneeGM Global Technology Operations LLC
InventorsQiangfeng Xiao, Mei Cai
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Abstract
Anodes including mesoporous hollow silicon particles are disclosed herein. A method for synthesizing the mesoporous hollow silicon particles is also disclosed herein. In one example of the method, a silicon dioxide sphere having a silicon dioxide solid core and a silicon dioxide mesoporous shell is formed. The silicon dioxide mesoporous shell is converted to a silicon mesoporous shell using magnesium vapor. The silicon dioxide solid core, any residual silicon dioxide, and any magnesium-containing by-products are removed to form the mesoporous, hollow silicon particle.
Claims17
A method for synthesizing a mesoporous, hollow silicon particle, comprising:
- providing a silicon dioxide sphere having a silicon dioxide solid core and a silicon dioxide mesoporous shell;
- converting the silicon dioxide mesoporous shell to a silicon mesoporous shell using magnesium vapor;
- and
- removing the silicon dioxide solid core, any residual silicon dioxide, and any magnesium-containing by-products to form the mesoporous, hollow silicon particle.
A particle, comprising:
- a hollow core;
- and
- a silicon mesoporous shell surrounding the hollow core,
- the particle having a surface area ranging from about 100 m2/g to about 600 m2/g.
An anode for a lithium ion battery, comprising:
- mesoporous, hollow silicon particles, each of the mesoporous, hollow silicon particles including:
- a hollow core;
- and
- a silicon mesoporous shell surrounding the hollow core;
- sodium alginate;
- and
- graphene.
Dependencies are inferred from the claim text.