| 摘要 |
PROBLEM TO BE SOLVED: To provide a non-aqueous secondary battery having a high capacity and excellent cycle characteristic. SOLUTION: This non-aqueous secondary battery is provided with a negative electrode, a positive electrode and the non-aqueous electrolyte. The active material of the negative electrode is silicon or the silicon compound expressed with a general formula MXSi (0≤x≤0.5, M:an element containing at least one kind of element, which forms an alloy with lithium and which does not form an intermetallic compound with silicon) and having 10-60% of crystallization degree to be computed by measuring differential scanning calorimetry, and at least one part of a surface of the silicon or silicon compound is coated with the carbonaceous material. This non-aqueous secondary battery is charged by a method of concluding charge within a range that an electric potential of the negative electrode in relation to the metal lithium is higher than 100 mV. COPYRIGHT: (C)2003,JPO |
