POSITIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
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United States of America Patent
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Issued Date -
Dec 24, 2015
app pub date -
Oct 4, 2013
filing date -
Jan 31, 2013
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Abstract
A nonaqueous electrolyte secondary battery that has high capacity and good load properties. A nonaqueous electrolyte secondary battery includes a positive electrode for a nonaqueous electrolyte secondary battery, a negative electrode, a separator interposed between the positive electrode for a nonaqueous electrolyte secondary battery and the negative electrode, and an electrolyte. The positive electrode for a nonaqueous electrolyte secondary battery includes a positive electrode current collector and a positive electrode active material layer disposed on the positive electrode current collector, the positive electrode active material layer containing a positive electrode active material and a positive electrode additive. The positive electrode additive contains a Li-containing compound that generates gas at 4.2 V (vs. Li/Li+) or less during first charging of the nonaqueous electrolyte secondary battery. The positive electrode active material layer has a porosity of 30% or less before the first charging of the nonaqueous electrolyte secondary battery.
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