ANODE FOR LITHIUM ION SECONDARY BATTERY, LITHIUM ION SECONDARY BATTERY, POWER TOOL, ELECTRIC VEHICLE, AND POWER STORAGE SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a lithium ion secondary battery with more excellent cycle characteristics.

SOLUTION: An anode 10 includes an anode active material layer 102 in which a first layer 1 containing silicon as an anode active material and a second layer 2 containing silicon and nickel as anode active materials are alternately layered on an anode current collector 101. An insertion layer 3 is inserted into the first layer 1 and the second layer 2. The insertion layer 3 is to be at least either a layered oxygen-containing region or a nitrogen-containing region. With this, stress accompanying expansion and contraction at charging and discharging in the anode active material layer 102 is alleviated. As the result, adhesion and a current collection property between the anode active layer 102 and the anode collector 101 is improved.

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