| abstract |
The present invention is a rechargeable battery comprising an anode, a cathode and an electrolyte, -The electrolyte contains an SEI film former, -The negative electrode contains a micrometer Si-based active material, a polymer binder material and a conductive agent, at least a part of the surface of the Si-based active material is composed of Si-OCO-R groups, Si is a part of the active material, and R is A rechargeable battery that is a polymer chain of binder material. |