The cathode for rechargeable lithium-ion batteries, and the rechargeable lithium-ion battery using this

Japanese Patent JP6015769

B2

[TECHNICAL PROBLEM] There is provided a negative electrode for an electric device such as a Li ion secondary battery capable of exhibiting well-balanced characteristics of a high cycle property and a high initial capacity. [SOLUTION TO PROBLEM] The negative electrode for an electric device includes a current collector and an electrode layer containing a negative electrode active material, a conductive auxiliary agent and a binder and formed on a surface of the current collector, wherein the negative electrode active material contains an alloy represented by the following formula (1): Si x Ti y M z A a (in the formula (1), M is at least one metal selected from the group consisting of Ge, Sn, Zn and a combination thereof, A is inevitable impurities, and x, y, z and a represent mass percent values and satisfy the conditions of 0