| 摘要 |
A positive electrode material for a lithium secondary cell, which contains a spinel-type lithium manganese oxide having a crystal structure belonging to Fd+E,ovs 3+EE m (No. 227), wherein the lithium manganese oxide satisfies the following formula: Li(Mn2-x-yLixMy)O4- delta -zAz wherein M is at least one metal element substitutable at Mn (16d) sites, other than Mn and Li, A is a halogen atom, x is from 0.01 to 0.10, y is a positive number, z is from 0 to 0.2, and delta represents a quantity of oxygen deficiency, and the average valency a of Mn is from 3.501 to 3.635.
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