Anode active material and battery

摘要

A battery with the high capacity, the superior cycle characteristics, and the superior initial charge and discharge efficiency, and an anode active material used for it are provided. The anode active material contains at least tin, cobalt, carbon, and phosphorus as an element. A carbon content is from 9.9 wt % to 29.7 wt %, a phosphorus content is from 0.1 wt % to 2.2 wt %, and a cobalt ration to the total of the tin and the cobalt is from 24 wt % to 70 wt %.

主权项

1. An anode active material comprising:
(a) at least tin, cobalt, carbon, phosphorus, iron, and silicon; and (b) at least one of titanium or bismuth wherein,
a carbon content is from and including 9.9 wt % to 29.7 wt %,a phosphorus content is from and including 0.5 wt % to 2.0 wt %a silicon content is from and including 0.5 wt % to 7.9 wt %,an iron content is from 0.1 wt % to 5.9 wt %, anda ratio of cobalt to the total of the tin and the cobalt is from and including 24 wt % to 70 wt %.