Anode for secondary battery
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United States of America Patent
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Sep 22, 2015
Grant Date -
May 23, 2013
app pub date -
Jan 7, 2013
filing date -
Jul 16, 2010
priority date (Note) -
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Abstract
Disclosed is an anode for secondary batteries comprising a combination of an anode active material having a relatively low charge/discharge voltage and a relatively low hardness (A) and an anode active material having a relatively high charge/discharge voltage and a relatively high hardness (B), wherein the anode active material (A) is surface-coated with carbon having a high hardness or a composite thereof, and a particle size of the anode active material (B) is smaller than a size of a space formed by the anode active materials (A) arranged in a four-coordination. The anode provides an electrode that prevents lithium precipitation caused by overvoltage, improves ionic conductivity as well as electric conductivity and exhibits superior capacity.
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