Lithium-ion secondary battery

摘要

Provided is a lithium-ion secondary battery that uses a non-carbonaceous negative electrode active material capable of exhibiting capacitance properties. The lithium-ion secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte solution. The negative electrode includes a mica group mineral having at least one transition metal in its composition as a negative electrode active material.

主权项

1. A lithium-ion secondary battery comprising a positive electrode, a negative electrode, and a non-aqueous electrolyte solution, wherein:
the negative electrode comprises, as a negative electrode active material, a mica group mineral having Fe and Mg in its composition; the mica group mineral comprises Fe2+; the mica group mineral is represented by general formula (I): K(Mg,Fe2+)3ZSi3O10A2, with Z being Al and/or Fe3+, and A being OH and/or F; and a content of Fe2+ is greater than a content of Mg in the mica group mineral.