Lithium—manganese-type solid solution positive electrode material

摘要

Provided is a lithium-manganese-type solid solution positive electrode material capable of effectively suppressing gas generation in an initial cycle. Proposed is a lithium-manganese-type solid solution positive electrode material that includes a monoclinic structure of C2/m in a hexagonal structure of a space group R-3m. The lithium-manganese-type solid solution positive electrode material contains a solid solution expressed by a composition formula: xLi4/3Mn2/3O2+(1−x)LiMnαCoβNiγO2 (in the formula, 0.2≦α≦0.6, 0≦β≦0.4, and 0.2≦γ≦0.6). In the composition formula, x is equal to or more than 0.36 and less than 0.50.

主权项

1. A lithium-manganese-type solid solution positive electrode material including a monoclinic structure of C2/m in a hexagonal structure of a space group R-3m, wherein the lithium-manganese-type solid solution positive electrode material comprises a solid solution expressed by a composition formula:
xLi4/3Mn2/3O2+(1−x)LiMn(1-β)/2CoβNi(1-β)/2O2 (in the formula, β is 0); and in the composition formula, x is equal to or more than 0.36 and less than 0.48.