POSITIVE ELECTRODE COMPOSITE ACTIVE MATERIAL, LITHIUM ION SECONDARY BATTERY, AND PRODUCTION METHOD FOR LITHIUM ION SECONDARY BATTERY
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United States of America
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Issued Date -
Jan 9, 2025
app pub date -
Oct 11, 2022
filing date -
Oct 11, 2022
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Abstract
The present invention provides a positive electrode composite active substance and a lithium ion secondary battery in which a coating layer covers a surface of an oxide active substance, and a resistance loss due to the coating layer can be suppressed while generation of gas due to decomposition of a nonaqueous electrolyte solution is suppressed as compared with a conventional case. A positive electrode composite active substance constituting a part of a positive electrode of a lithium ion secondary battery using a nonaqueous electrolyte solution as an electrolyte, the positive electrode composite active substance including: an oxide active substance; and a coating layer covering a surface of the oxide active substance, in which the coating layer has lithium ion conductivity, and a grain boundary resistance of the coating layer is 3 times or more and 20 times or less larger than a charge transfer resistance of the oxide active substance.
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