| 摘要 |
PURPOSE:To suppress the generation of dendrite of lithium separated from the surface of a negative electrode plate and to prevent the inner short circuit by making the width of the negative electrode plate mainly of lithium larger than the width of a positive electrode plate mainly of LiMn2O4. CONSTITUTION:In a nonaqueous electrolyte lithium type secondary cell, the width of the negative electrode plate is made larger than that of the positive electrode plate, to suppress the generation of dendrite of lithium separated from the surface of the negative electrode plate by the repeated charge and discharge and to prevent the inner short circuit, resulting in an improvement of the charge and discharge performance. When such a composition in which the width of the negative electrode plate is made larger than that of the positive electrode plate is compared with the composition in which both widths are equal or the width of the negative electrode plate is smaller than that of the positive electrode plate, a fairly large difference can be observed in the cycle life numbers. |
