| 摘要 |
The invention is to provide a non-aqueous electrolyte cell having: the advantages of no risk of igniting, no risk of exploding and catching fire in the event of short-circuit, low internal resistance, good low-temperature discharge characteristic, good degradation resistance, good self-extinguishability and flame retardancy, good electrochemical stability, high voltage, high discharge capacity, and which can be manufactured easily. Of the non-aqueous electrolyte cell of the invention that comprises a non-aqueous electrolyte, a positive electrode and a negative electrode, the first aspect is such that the non-aqueous electrolyte contains lithium ions and a phosphagen derivative having a flash point of not lower than 100 DEG C; the second aspect is such that the non-aqueous electrolyte contains a supporting salt, an organic solvent and a phosphagen derivative, the lowermost limit of the potential window of the phosphagen derivative is at most +0.5 V, the uppermost limit thereof is at least +4.5 V, and the potential window of the organic solvent is wider than that of the phosphagen derivative; the third aspect is such that the non-aqueous electrolyte contains a supporting salt and a phosphagen derivative whose electroconductivity in a lithium salt solution (0.5 mol/liter) is at least 2.0 mS/cm; and the fourth aspect is such that the non-aqueous electrolyte contains a supporting salt and a phosphagen derivative whose dielectric constant at 25 DEG C is at least 15 and the viscosity is at most 20 mPa.s (20 cP). |
