| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high-capacity negative electrode using lithium as a negative electrode active material, utilizing the characteristic of lithium of high capacity, and extremely useful for reducing the weight and size of a battery. <P>SOLUTION: This negative electrode has a structure composed by stacking lithium on both surfaces of a composite collector comprising a resin film, conductive treatment layers formed on both the surfaces of the resin layer, and a metal-plated layer formed on the conductive treatment layers by electrolytic plating. The composite collector has a surface electric resistance of 40 mΩ/cm or below and a tensile strength of 0.8 kg/cm or above, and is characterized by satisfying the condition of the following inequality: Y1+Y2+Y3≤0.8×(X1+X2+X3)×Y3/X3, wherein X1 is the thickness (μm) of the resin film; X2 is the the total thickness (μm) of the conductive treatment layer; X3 is the the total thickness (μm) of the metal-plated layer; Y1 is the weight (mg/cm<SP>2</SP>) of the resin film; Y2 is the weight (mg/cm<SP>2</SP>) of the conductive treatment layer; and Y3 is the weight (mg/cm<SP>2</SP>) of the metal-plated layer. <P>COPYRIGHT: (C)2004,JPO |
