| abstract |
The capacity of the negative electrode in the secondary battery is improved. A negative electrode comprising a non-aqueous electrolyte and a negative electrode active material, wherein the reduction and decomposition potential of the non-aqueous electrolyte is less than or equal to the cell reaction potential of the negative electrode active material, and the negative electrode active material content in the negative electrode is 76 wt% or more. The non-aqueous electrolyte has a mixture of an ether-based solvent and a solvated electrolyte salt and a low-viscosity organic solvent, and the mixture of the low-viscosity organic solvent with respect to the total amount of the mixture and the low-viscosity organic solvent is less than 80 wt% cathode, and the ether-based solvent is tetrag It may be a cathode having lime. |