| abstract |
The present invention relates to silica, manufacture method, negative electrode, lithium ion secondary accumulator battery and electrochemical capacitor, wherein described particulate silica is used as negative electrode material in nonaqueous electrolyte secondary accumulator battery is constructed, Cu contents, at most the Fe contents of 20 1000ppm, the Al content of 1000ppm, 0.1 30 μm of average particle size particle size and 0.5 30m that it has 100 20000ppm 2 The BET specific surface area of/g.While accumulator capacity high and low silica volumetric expansion is kept, the cycle performance of secondary accumulator battery is improved. |