ELECTRODE MATERIAL, METHOD FOR PRODUCING SAME, AND LITHIUM ION SECONDARY BATTERY
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United States of America Patent
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Issued Date -
Mar 15, 2012
app pub date -
Mar 24, 2007
filing date -
Apr 1, 2009
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Abandoned
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Abstract
Secondary batteries for automobiles require good input/output characteristics and low internal resistance. Conventionally, the surface of an active material is coated with metal particles to reduce the internal resistance of a battery, but without achieving remarkable improvement in the conductivity of the active material or decreasing the internal resistance of the battery since an oxide film is formed on the metal particle surfaces. The present electrode material is produced by mixing and dispersing an active material and a metal source compound, then depositing metal particles on the surface of the active material by thermal decomposition, vapor phase reduction, liquid phase reduction or a chemical reaction combining any of these. Since an oxide film is not formed on the metal particles, an electrode material having high conductivity is obtained. The electrode material decreases the internal resistance of a battery and improves the input/output characteristics of a battery.
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