POSITIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES, POSITIVE ELECTRODE MEMBER FOR LITHIUM ION SECONDARY BATTERIES, LITHIUM ION SECONDARY BATTERY, AND METHOD FOR PRODUCING POSITIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES

摘要

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.

主权项

1. A cathode material for a lithium ion secondary battery being a composite grain comprising: an oxide including, as constituent elements, Li, Si and at least one of Fe and Mn; and a carbon material, wherein
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, and a size of the grain is 1 μm or more and 20 μm or less.