Composite current collector
First Claim
1. A composite current collector in which, after forming on a surface of a resin film a conductive treatment layer whose surface electric resistance is not higher than 1.3 Ω
- /cm by performing a conductive treatment, a plating layer whose thickness is at least 0.3 μ
m per one face is formed by an electrolytic plating treatment, characterized in that the surface electric resistance after the electrolytic plating is not higher than 40 mΩ
/cm, and additionally following expression is satisfied;
Y1+Y2+Y3≦
0.8×
((X1+X2+X3)×
Y3/X3) where X1;
thickness of resin film (μ
m) X2;
thickness of conductive treatment layer (μ
m) X3;
thickness of plating layer (μ
m) Y1;
weight of resin film (mg/cm2) Y2;
weight of conductive treatment layer (mg/cm2) Y3;
weight of plating layer (mg/cm2).
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Abstract
A current collector effective for reductions in weight and thickness. The current collector produced by forming a conductive layer having a surface electric resistance not higher than 1.3 Ω/cm on the surface of a resin film and then forming an electrolytic plating layer having a thickness of at least 0.3 μm per one side, characterized in that the surface electric resistance is not higher than 40 m Ω/cm after electrolytic plating and following expression is satisfied; Y1+Y2+Y3≦0.8×((X1+X2+X3)×Y3/X3) where, X1: thickness of resin film (μm), X2: thickness of conductive layer (μm), X3: thickness of plating layer (μm), Y1: weight of resin film (mg/cm2), Y2: weight of conductive layer (mg/cm2), and Y3: weight of plating layer (mg/cm2).
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Citations
15 Claims
-
1. A composite current collector in which, after forming on a surface of a resin film a conductive treatment layer whose surface electric resistance is not higher than 1.3 Ω
- /cm by performing a conductive treatment, a plating layer whose thickness is at least 0.3 μ
m per one face is formed by an electrolytic plating treatment,characterized in that the surface electric resistance after the electrolytic plating is not higher than 40 mΩ
/cm, and additionally following expression is satisfied;
Y1+Y2+Y3≦
0.8×
((X1+X2+X3)×
Y3/X3)where X1;
thickness of resin film (μ
m)X2;
thickness of conductive treatment layer (μ
m)X3;
thickness of plating layer (μ
m)Y1;
weight of resin film (mg/cm2)Y2;
weight of conductive treatment layer (mg/cm2)Y3;
weight of plating layer (mg/cm2). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 14)
- /cm by performing a conductive treatment, a plating layer whose thickness is at least 0.3 μ
-
9. A composite current collector in which conductive treatment layers are formed on both faces of a resin film having many through-holes, characterized in that, after forming a plating layer on the conductive treatment layer by an electrolytic plating treatment, a surface electric resistance is not higher than 40 mΩ
- /cm, a tensile strength higher than 0.8 kg/cm and a front/back current-carrying resistance not higher than 100 mΩ
, and additionally following expression (2) is satisfied;
Y1+Y2+Y3≦
0.8×
(X1+X2+X3)×
Y3/X3
(2)where X1;
thickness of resin film (μ
m),X2;
thickness of conductive treatment layer (μ
m),X3;
thickness of plating layer (μ
m),Y1;
weight of resin film (mg/cm2),Y2;
weight of conductive treatment layer (mg/cm2)Y3;
weight of plating layer (mg/cm2).- View Dependent Claims (10, 11, 12, 13, 15)
- /cm, a tensile strength higher than 0.8 kg/cm and a front/back current-carrying resistance not higher than 100 mΩ
Specification