Lithium battery including positive electrode comprising manganese oxide in a mixed crystal state

Abstract

The present invention has an objective to improve the storage characteristics and pulse discharge characteristics, especially in the high temperature region of 100° C. or more, of a lithium battery comprising a positive electrode including manganese oxide, a negative electrode, and a non-aqueous electrolyte. To achieve this objective, the lithium battery of the present invention includes a positive electrode (3) including manganese oxide in mixed crystal state, a negative electrode (4) desorbing lithium ions during discharging, and a non-aqueous electrolyte having lithium ion conductivity. The aforementioned manganese oxide in mixed crystal state includes at least λ-type manganese oxide and β-type manganese oxide. The aforementioned non-aqueous electrolyte includes at least one additive selected from the group consisting of cyclic sultone compounds and sulfone compounds.

Dependencies are inferred from the claim text.