Anode and secondary battery

摘要

A secondary battery capable of improving the cycle characteristics and the swollenness characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. The anode includes an anode active material layer having a plurality of fine pores on an anode current collector. The anode active material layer contains an anode active material and an anode binder. A change rate of a mercury intrusion into the plurality of fine pores measured by mercury penetration technique is distributed to show a peak in the pore diameter range from 30 nm to 10000 nm, both inclusive.

主权项

1. A secondary battery comprising:
a cathode; an anode; and an electrolytic solution, wherein,
the anode includes an anode collector and an anode active material layer on the anode current collector,the anode active material layer comprises an anode active material and an anode binder,the anode active material layer comprises a plurality of fine pores therein,the anode active material layer has a distribution of a change rate of a mercury intrusion into the plurality of fine pores measured by mercury penetration technique showing a maximum peak in a pore diameter range from and including 1,000 nm to 5,000 nm anda porosity of the anode active material layer is in the range from and including 4% to 70%.