| 摘要 |
PURPOSE:To enhance the charge/discharge cycle characteristic and prolong the life by using alkali metal containing Li as active substance, and by using as bearer a one which has a specific H/C value, G-value corresponding to the measure for the degree of graphitization, size of surface spacing Lc of (002) faces by X-rays wide-angle diffraction method, volume average particle size, and specific surface area. CONSTITUTION:Li or an al-metal containing Li is used as active material in this negative electrode body. An aggregate containing a carbonaceous material particles with specific property as a component unit is used as bearer. That is, H/C value is below 0.15, the G value indicated by Eq. I in Raman spectrum analysis using argon ion laser beam having a wave length of 5145Angstrom is no greater than 2.5, the surface spacing of the (002) face by X-rays wide-angle diffraction method is over 3.37Angstrom , size of crystallite in the C-axis direction is no greater than 150Angstrom , and the volume average particle size is no greater than 500Angstrom . The specific surface area of this aggregate shall be over 1 m<2>/g. |
