| 摘要 |
PROBLEM TO BE SOLVED: To provide a non-aqueous electrolyte secondary battery that has excellent self fire-extinguishing and fire retardance and deterioration resistance as well as low surface resistance of non-aqueous electrolyte and excellent electrochemical stability, and low temperature discharging characteristics, while keeping the long term stability and safety necessary for a battery. SOLUTION: The non-aqueous electrolyte secondary battery comprises a positive electrode, a negative electrode, supporting salt, organic solvent and non-aqueous electrolyte containing phosphagen derivative. The above phosphagen derivative has an electric potential window in the range of a lower limit of less than +0.5 V and an upper limit of more than +4.5 V, and the electric potential window of the above organic solvent has a wider range than that of the phosphagen derivative. It is a desirable state and manner that the electric potential window of phosphagen derivative is in the range less than +0 V of lower limit and more than +5 V of upper limit, and that viscosity of the phosphagen derivative is less than 100 m Pa.s (100 cP) at 25 deg.C and that the flashing point of the phosphagen derivative is more than 100 deg.C, etc. |
