Lithium ion secondary battery
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United States of America Patent
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Aug 25, 2020
Grant Date -
Jun 23, 2016
app pub date -
Dec 11, 2015
filing date -
Dec 18, 2014
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Abstract
A lithium ion secondary battery includes: a negative electrode having a carbon-based negative electrode material containing graphite particles and amorphous carbon particles; and a positive electrode including a lithium composite oxide. The lithium composite oxide is represented by a general formula: LixNiyMnzCo(1-y-z)O2, where x is a numeral of 1 or more and 1.2 or less, and y and z are positive numerals satisfying the relation of y+z<1. The lithium composite oxide has a layer crystal structure and has a median particle diameter (D50) of 4.0 μm or more and less than 6.0 μm.
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