Polymer-modified silicon-carbon composite and use thereof
AssigneeEternal Materials Co., Ltd.
InventorsLin Jen Tsai, Chiyu Huang, Chihhsien Wang
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Abstract
The present invention provides a silicon-carbon composite which contains a body having a core-shell structure and a polymer modification layer. The core of the body contains a silicon-containing particle. The shell of the body is a carbon encapsulation layer. The polymer modification layer is located on the external surface of the shell of the body and encapsulates the body. The polymer modification layer comprises a polymer selected from the group consisting of polyester, polyfluorocarbon, polyvinyl alcohol, polyacrylic acid, cellulose and a combination thereof.
Claims8
A silicon-carbon composite, comprising a body having a core-shell structure and a polymer modification layer, wherein:
- (a) the core of the body is a silicon-containing particle, and the shell of the body is a carbon encapsulation layer;
- and
- (b) the polymer modification layer is located on the external surface of the shell of the body and encapsulates the body, and the polymer modification layer comprises a polymer selected from the group consisting of polyester, polyfluorocarbon, polyvinyl alcohol, polyacrylic acid, cellulose and a combination thereof,
- wherein the carbon encapsulation layer comprises pyrolytic carbon formed by incompletely carbonizing erythritol and at least one organic substance selected from the group consisting of trehalose, xylose and isomalt, and
- wherein the ratio of the integral area of a characteristic peak of sp2 carbon to the total integral area of the characteristic peaks of C1s orbital measured by use of X-ray photoelectron spectroscopy for the carbon encapsulation layer is in a range from 0.5 to 0.7.
Dependencies are inferred from the claim text.