CATHODE MATERIAL FOR SECONDARY BATTERIES, METHOD FOR PRODUCING CATHODE MATERIAL FOR SECONDARY BATTERIES, AND SECONDARY BATTERY
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United States of America Patent
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Mar 17, 2016
app pub date -
May 14, 2014
filing date -
May 15, 2013
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Abstract
A cathode material for Li ion secondary batteries has high output and high energy density with excellent electron conductivity and Li ion conductivity. The cathode material contains an electrode active material base containing Li, which is capable of electrode oxidation/reduction accompanied by desorption and absorption of Li ions in a potential range of 4 V or more and 5 V or less based on a metal Li negative electrode and has a reversible charge/discharge capacity accompanying the electrode oxidation/reduction in the potential range described above of 30 mAh or more per 1 g. Surfaces of primary particles of an electrode active material base are coated with a layer containing a conductive polymer and a negative ion that enables the conductive polymer to produce electron conductivity equal to or higher than the electron conductivity of the electrode active material itself.
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