Cathode material for lithium ion secondary batteries, cathode member for lithium ion secondary batteries, lithium ion secondary battery, and method for producing cathode material for lithium ion secondary batteries
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United States of America Patent
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Jun 28, 2016
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Aug 7, 2014
app pub date -
Aug 31, 2012
filing date -
Sep 5, 2011
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Abstract
A cathode material for a lithium ion secondary battery is a composite grain including an oxide and a carbon material. The oxide includes, as constituent elements, Li, Si and at least one of Fe and Mn. According to a measurement by an X-ray diffraction method using Cu-Kα as an X-ray source, a diffraction peak exists within a range of 2θ=33±2° and a half width of the diffraction peak is 0.55° or more. A size of the grain is 1 μm or more and 20 μm or less.
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