| 摘要 |
PURPOSE:To obtain a high performance secondary battery having high discharge voltage by using electrolyte comprising organic solvent and solute and using specific carbon material having different property in a positive electrode and a negative electrode. CONSTITUTION:Activated carbon or activated carbon fiber is used in a positive electrode 2 and graphite or graphitized carbon fiber is used in a negative electrode 1, and electrolyte comprising organic solvent and solute is used. As the activated carbon material, for example, coconut shell activated carbon having a surface area of 500-1,000m<2>/g or activated carbon fiber having a surface area of 300-3,000m<2>/g is used. As graphite material for the negative electrode, highly graphitized material such as graphite powder or graphitized carbon fiber is preferable, especially cloth or felt having large surface area comprising highly graphitized carbon fiber is preferable in terms of electrode production. As solute of the electrolyte, LiCIO4, LiBF4, LiPF6<->, LiAsF6 having Li<+> is preferable. |
