NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
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United States of America Patent
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Jan 21, 2016
app pub date -
Mar 13, 2014
filing date -
Mar 27, 2013
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Abstract
The present invention has a main object to improve the thermal stability of a nonaqueous electrolyte secondary battery. A nonaqueous electrolyte secondary battery according to an aspect of the present invention includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode contains a positive electrode active material and a metal fluoride. The positive electrode active material contains particles of a lithium transition metal oxide. At least one portion of the surface of each of the lithium transition metal oxide particles has a rare-earth compound attached thereto. The nonaqueous electrolyte contains a fluorine-containing lithium salt. The rare-earth compound is preferably a hydroxide, an oxyhydroxide, or an oxide.
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