Negative electrode for secondary battery, and secondary battery
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsMasahiro Soga, Norihisa Yamamoto, Naomichi Sato
Life of this patent
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Abstract
An electrode for secondary batteries according to one example of an embodiment is provided with a core body and a mixture layer that is formed on the core body. The mixture layer includes a first mixture layer and a second mixture layer disposed on the first mixture layer, and contains graphite and silicon material as active materials, and the content of the silicon material is greater than or equal to 0.5% by mass with respect to the active material. The ratio (τ2/τ1) of the tortuosity factor (τ2) of the second mixture layer to the tortuosity factor (τ1) of the first mixture layer is less than 1.1.
Claims8
A negative electrode for a secondary battery, comprising:
- a core;
- and
- a mixture layer formed on the core,
- wherein the mixture layer includes a first mixture layer, and a second mixture layer disposed on the first mixture layer, and contains graphite and a silicon material as an active material, and a content of the silicon material is greater than or equal to 0.5% by mass, and
- a ratio (τ2/τ1) of a tortuosity (τ2) of the second mixture layer to a tortuosity (τ1) of the first mixture layer is less than 1.1.
Dependencies are inferred from the claim text.