| abstract |
A non-aqueous secondary battery, comprising: a positive electrode member, including a positive electrode active material composed of Na X Fe Y (SO 4 ) Z (0<X≤3, 1≤Y≤3, 2≤Z≤4), a conductive Materials and binders; a negative electrode component including a negative electrode active material capable of intercalating and deintercalating sodium ions and a binder; and a separator, wherein the surface of the positive electrode active material is covered with a hydrogen group-containing carbonaceous layer. |