Secondary battery

摘要

There is provided a negative electrode for a secondary battery that can provide a secondary battery having high charge and discharge efficiency, and a high capacity retention rate in charge and discharge cycles. A negative electrode for a secondary battery according to this exemplary embodiment contains scale-like graphite, a fluorine-based resin, and an imide-based resin. A method for manufacturing a negative electrode for a secondary battery according to this exemplary embodiment includes applying a negative electrode slurry containing scale-like graphite, a fluorine-based resin, an imide-based resin, and a solvent for dissolving the fluorine-based resin and the imide-based resin to a negative electrode current collector; and heat-treating the negative electrode current collector at a temperature of 100° C. or more and 150° C. or less.

主权项

1. A negative electrode for a secondary battery comprising scale-like graphite, a fluorine-based resin, and an imide-based resin,
wherein the negative electrode for a secondary battery satisfies either the following items (i), (ii), or (iii); (i) a mass ratio of the imide-based resin (IP) to a total of the fluorine-based resin (FP) and the imide-based resin (IP), (IP/(FP+IP)), is 0.1 or more and 0.5 or less; (ii) a mass ratio of the fluorine-based resin (FP) to the scale-like graphite (SG), (FP/SG), is 0.01 or more and 0.05 or less; (iii) a mass ratio of the imide-based resin (IP) to the scale-like graphite (SG), (IP/SG), is 0.005 or more and 0.05 or less.