| 摘要 |
<p>In order to provide a secondary battery positive electrode material having a crystal structure having a highly thermally stable pyrophosphoric acid P2O7 structure as a fundamental skeleton and capable of obtaining a high discharging capacity and also to provide a secondary battery using the secondary battery positive electrode material, the following configuration is employed. The secondary battery positive electrode material consists primarily of a chemical composition formula of A2-xMP2O7-deltaZdelta, wherein: A is an alkali metal (1 to 4) such as, for example, lithium; M is a transition metal such as, for example, iron that is able to form a divalent or more multivalent ion; Z is a halogen such as, for example, fluorine; x is 0 or more and less than 2; and delta is greater than 0 and less than or equal to 1.47. A secondary battery using this positive electrode material is also provided.</p> |
