NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
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United States of America Patent
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Feb 18, 2016
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Feb 25, 2015
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It is an object of the present invention to provide a nonaqueous electrolyte secondary battery improved not only in room-temperature output but also in low-temperature regeneration. A positive electrode plate contains a lithium transition metal oxide as a positive electrode active material. A mix of the positive electrode plate contains a tungsten oxide and a phosphate compound. A nonaqueous electrolyte contains a linear sulfonate. When both of the tungsten oxide and the phosphate compound are present near the positive electrode active material, the linear sulfonate forms a movable decomposition product by oxidative decomposition on a surface of a positive electrode without forming any coating and the decomposition product and the unreacted linear sulfonate are reductively decomposed on a surface of the negative electrode together and a low-resistance coating is thereby formed.
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