Electrode, secondary battery, battery pack, electric vehicle, electric power storage system, electric power tool, and electronic apparatus

摘要

A secondary battery includes: a cathode; an anode; and an electrolytic solution. The cathode includes a lithium composite oxide, a first compound, and a second compound. The lithium composite oxide includes lithium (Li) and a transition metal element as constituent elements. The first compound includes a first metal element different from the transition metal element as a constituent element, the first compound existing on a surface and inside of the lithium composite oxide. The second compound includes a second metal element different from the first metal element as a constituent element, the second compound existing on the surface of the lithium composite oxide.

主权项

1. A secondary battery comprising:
a cathode; an anode; and an electrolytic solution, wherein the cathode includes particles of a lithium composite oxide, a first compound, and a second compound, the lithium composite oxide includes lithium (Li) and a transition metal element as constituent elements, the first compound is Li4Ti5O12, the first compound existing on a surface of and inside of the particles of lithium composite oxide, and the second compound includes a second metal element different from titanium as a constituent element, the second compound existing on the surface of but not inside of the particles of lithium composite oxide.