US Patent No. 10,658,697

SECONDARY BATTERY, BATTERY PACK, ELECTRIC VEHICLE, ELECTRIC POWER STORAGE SYSTEM, ELECTRIC POWER TOOL, AND ELECTRONIC DEVICE


Patent No. 10,658,697
Issue Date May 19, 2020
Title Secondary Battery, Battery Pack, Electric Vehicle, Electric Power Storage System, Electric Power Tool, And Electronic Device
Inventorship Masayuki Iwama, Kyoto (JP)
Assignee Murata Manufacturing Co., Ltd., Kyoto (JP)

Claim of US Patent No. 10,658,697

1. A secondary battery comprising: a positive electrode; a negative electrode including a carbon material and a silicon-based material; and an electrolyte layer, wherein the electrolyte layer includes an electrolytic solution and a polymeric compound, and wherein the electrolyte layer includes one or more through-holes extending in a thickness direction of the electrolyte layer, wherein a number of the one or more through-holes per unit area of the electrolyte layer is from 1 hole/cm2 to 100 hole/cm2.