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US 2022/0064008 A1Published application
Silicon carbon composites comprising ultra low z
AssigneeGroup14 Technologies, Inc.
InventorsAbirami Dhanabalan, Avery J. Sakshaug, Henry R. Costantino
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Abstract
Silicon-carbon composite materials and related processes are disclosed that overcome the challenges for providing amorphous nano-sized silicon entrained within porous carbon. Compared to other, inferior materials and processes described in the prior art, the materials and processes disclosed herein find superior utility in various applications, including energy storage devices such as lithium ion batteries.
Claims22
1-20. (canceled)
A silicon-carbon composite comprising:
- a. a carbon scaffold comprising a pore volume, wherein the pore volume comprises greater than 80% microporosity;
- b. a silicon content of 30% to 60% by weight;
- c. a Z of less than 5, wherein Z=1.875×[(M1100−M800)/M1100]×100%, wherein M1100 is a mass of the silicon-carbon composite at 1100° C. and M800 is a mass of the silicon-carbon composite at 800° C. when the silicon-carbon composite is heated under air from about 25° C. to about 1100° C., as determined by thermogravimetric analysis;
- and
- d. a surface area less than 30 m2/g.
2 more elements
Dependencies are inferred from the claim text.