Negative electrode for lithium-ion secondary cell and method for manufacturing same

摘要

A negative electrode for a lithium-ion secondary cell is configured in a novel manner, having a charge-discharge capacity, as determined per unit weight of the carbon used in the electrode, that is markedly higher than the theoretical capacity of graphite, and having a surface that is stabilized against repeated charging and discharging. A negative electrode for a lithium-ion secondary cell in which a carbon layer obtained by building up and growing a graphene sheet is formed on the surface of a substrate comprising an iron-based metal, the carbon layer being formed in a diagonal direction in relation to the substrate, and the carbon layer being used as the surface of the negative electrode. As measured using an argon laser having a wavelength of 532 nm, the Raman spectrum of the graphite that constitutes the carbon nanochip layer has a g/d ratio of 0.30-0.80.

主权项

1. A negative electrode for a lithium-ion secondary cell, the negative electrode comprising: a substrate formed of an iron-based metal; and graphene sheets grown on the substrate to stand in directions oblique to a surface of the substrate to form a carbon layer, wherein the carbon layer is used as a negative electrode surface.