SECONDARY BATTERY: abstract simplified (18128099)

• This abstract for appeared for patent application number 18128099 Titled 'SECONDARY BATTERY'

Simplified Explanation

The abstract describes a type of secondary battery that has a positive electrode, a negative electrode, and an electrolytic solution. The negative electrode is made up of a material called Si-based negative electrode active material, along with a negative electrode binder. The Si-based material consists of a core made of a compound containing silicon, which is covered by another material. This covering material has a lower stiffness than the negative electrode binder and can stretch without breaking. It has an elongation at break of 100% or more, and can recover 70% or more of its original shape after being stretched to that extent.

Original Abstract Submitted

A secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The negative electrode includes a Si-based negative electrode active material and a negative electrode binder. The Si-based negative electrode active material includes an active material core and a covering material. The active material core includes a Si-containing compound. The covering material covers at least a portion of a surface of the active material core. The covering material has an elastic modulus lower than an elastic modulus of the negative electrode binder. The covering material has an elongation at break of 100% or higher, and has a recovery of 70% or higher after being stretched to an elongation at break of 100%.