Patent ID: 8865352

Claim:
A negative electrode, comprising: a negative electrode layer comprising: an active material consisting essentially of an amorphous carbon particle capable of occluding and releasing at least one of an alkali metal and an alkaline earth metal; and a binder, the negative electrode layer including a plurality of pores, and a ratio S 1 /S 2 of a specific surface area (S 1 ) of micropores having a pore diameter of 1 nm or more and 3 nm or less in the pores to a specific surface area (S 2 ) of mesopores having a pore diameter of 20 nm or more and 100 nm or less therein being 0.3 or more and 0.9 or less, wherein the amorphous carbon particle has a hardness in a range of 360 to 940 in terms of Vickers hardness.