Active material for battery, and battery

摘要

An active material for a battery, which has high thermal stability and low electric potential. According to the invention, an active material for a battery including an M element in Group III, a Ti element, an O element, and an S element and having an M2Ti2O5S2 crystalline phase is provided to solve the problem.

主权项

1. A secondary battery comprising a cathode active material layer containing a cathode active material, an anode active material layer containing an anode active material, and an electrolyte layer formed between the cathode active material layer and the anode active material layer,
wherein
the cathode active material or the anode active material is a first active material comprising a M element in Group III, a Ti element, an O element, and a S element and comprising an M2Ti2O5S2 crystalline phase with a proportion of 50 mol % or higher, anda Li insertion and extraction electric potential of the first active material relative to Li metal is 1.4 V or less.