Electrode for electrochemical device and electrochemical device

Abstract

An electrode for an electrochemical device, including an elongated collector, a lead provided halfway along a longitudinal direction of the collector, and active material layers provided on the collector, wherein when L a (m) is a distance from one end of the collector, in the longitudinal direction, up to the lead, and L b (m) is a distance from the other end of the collector, in the longitudinal direction, up to the lead, and ρ (Ωm) is a resistivity of the collector at 25°, where L opt (m) being 1.9×10 6 ρ, the L a (m) and L b (m) are from 0.95 L opt to 1.05 L opt respectively.

1 . An electrode for an electrochemical device, comprising: an elongated collector; a lead provided halfway along a longitudinal direction of said collector; and an active material layer provided on said collector, wherein
 when L a  (m) is a distance from one end of said collector, in the longitudinal direction, up to said lead, L b  (m) is a distance from the other end of said collector, in the longitudinal direction, up to said lead, and ρ (Ωm) is a resistivity of said collector at 25° C., where L opt  (m) being 1.9×10 6 ρ,   the L a  (m) and L b  (m) are from 0.95 L opt  to 1.05 L opt  respectively.   
     
     
         2 . An electrode for an electrochemical device, comprising: an elongated collector, n leads (n being an integer equal to 2 or greater) provided spaced apart from each other in said collector along a longitudinal direction of said collector; and an active material layer provided on said collector, wherein
 when L a  (m) is a distance from one end of said collector, in the longitudinal direction, up to a lead closest to said one end, L b  (m) is a distance from the other end of said collector, in the longitudinal direction, up to a lead closest to said other end, L 1 , L 2 , . . . , L n−1  (m) are distances between adjacent leads, and ρ (Ωm) is a resistivity of said collector at 25° C., where L opt  (m) being 19×10 6 ρ,   the L a  and L b  are from 0.95 L opt  to 1.05 L opt  respectively, and   (L 1 /2), (L 2 /2), . . . , (L n−1 /2) respectively range from 0.95 L opt  to 1.05 L opt .   
     
     
         3 . An electrochemical device, comprising a pair of electrodes, wherein both electrodes are the electrode for electrochemical devices according to  claim 1 . 
     
     
         4 . An electrochemical device, comprising a pair of electrodes, wherein both electrodes are the electrode for electrochemical devices according to  claim 2 .