NEGATIVE ELECTRODE MEMBRANE AND LITHIUM ION BATTTERY USING THE SAME
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United States of America Patent
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Issued Date -
May 12, 2016
app pub date -
Oct 30, 2015
filing date -
Nov 6, 2014
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Abstract
The present application provides a negative electrode membrane containing a negative electrode active substance, a conductive agent, a binder and a thickener, wherein the mass percent content of the binder in the negative electrode membrane does not exceed 2%, and the binder contains a polymer formed of a styrene monomer, an acrylate-based monomer and an acrylic acid-based monomer. The negative electrode membrane has small content of binders and good ion conductivity performance; with the usage of the negative electrode membrane in a Lithium ion battery, in cases of high-rate fast charging, it is possible to avoid lithium to precipitate on a surface of the negative electrode sheet, and the Lithium ion battery may have good safety and cycle performance.
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