Non-aqueous electrolyte solution type lithium ion secondary battery
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United States of America Patent
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Dec 8, 2015
Grant Date -
Mar 7, 2013
app pub date -
Sep 14, 2010
filing date -
Oct 13, 2009
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Abstract
A lithium-ion secondary battery with excellent durability is provided using a two-phase coexisting compound as a positive electrode active material. This lithium-ion secondary battery is provided with an electrode body having a positive electrode containing a positive electrode active material and a negative electrode containing a negative electrode active material, and a non-aqueous electrolyte solution containing a lithium salt in an organic solvent. The positive electrode active material is mainly composed of a two-phase coexisting compound containing lithium, and also contains particles of a lithium-transition metal oxide with a layered structure. The particles of the layered oxide have an average particle diameter of 2 μm or less, and the percentage content thereof in the positive electrode active material is 5 mass % or less.
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