| 摘要 |
PURPOSE:To enhance discharge capacity by forming a negative electrode by a composition in which 1-30wt.% of carbon black is contained in a graphitized gas phase developing carbon fiber having a carbon lattice spacing of less than 0.345nm. CONSTITUTION:A negative electrode is formed by a composition in which 1-30wt.% of carbon black is contained in a graphitized gas phase developing carbon fiber having a carbon lattice spacing d002 of less than 0.345nm, preferably, less than 0.338nm. As the carbon black to be used, acetylene black is suitably used, but thermal black and furnace black may be also used. The mixing ratio of carbon black in the gas phase developing carbon fiber is 2-12wt.% when electrolyte mainly consists of LiPF6, and 4-20wt.% when it mainly consists of LiClO4. A part of the gas phase developing carbon fiber is substituted by carbon black, whereby a discharge capacity value exceeding the theoretical charge capacity of the gas phase developing carbon fiber alone can be provided. |
