| 摘要 |
To provide a positive electrode material mixture for a non-aqueous secondary battery, which is less likely to be gelled and has a good applicability to a current collector even if a highly basic electrode active material is used, and which provides an excellent adhesion between the cathode active material and the current collector, presents little swelling of an electrode with an electrolyte at a high temperature and is capable of producing a non-aqueous secondary battery capable of sufficiently exhibiting practical performance, and a positive electrode for a non-aqueous secondary battery and a secondary battery, employing it. A positive electrode material mixture for a non-aqueous secondary battery, which comprises a cathode active material (a), a binder (b) containing a fluorinated copolymer having polymerized units derived from tetrafluoroethylene and polymerized units derived from propylene, and an aqueous medium, wherein the cathode active material (a) is such a cathode active material that the pH of a supernatant obtained by mixing 10 g of the cathode active material (a) with 100 cm 3 of water at 25°C for 5 minutes and thereafter allowing the same to stand still for one minute, is at least 10, and a positive electrode for a non-aqueous secondary battery and a secondary battery, obtainable by employing it. |
