Anodes including mesoporous hollow silicon particles and a method for synthesizing mesoporous hollow silicon particles
AssigneeGM Global Technology Operations LLC
InventorsQiangfeng Xiao, Mei Cai
Life of this patent
Estimating the term…
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.
Claims7
A particle, comprising:
- a hollow core having a diameter ranging from about 200 nm to about 1.5 μm;
- and
- a silicon mesoporous shell surrounding the hollow core, wherein the silicon mesoporous shell includes a plurality of pores having an average diameter ranging from about 2 nm to about 30 nm;
- 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 having a diameter ranging from about 200 nm to about 1.5 μm;
- and
- a silicon mesoporous shell surrounding the hollow core, wherein the silicon mesoporous shell includes a plurality of pores having an average diameter ranging from about 2 nm to about 30 nm;
- sodium alginate;
- and
- graphene.
Dependencies are inferred from the claim text.