Electrode structure

Abstract

The electrode structure for electronic devices according to the present invention comprises a powdered electrode material, and carbon nanotubes having a volume resistivity of not more than 2×10 −2 Ω·cm.

1 . An electrode structure used in an electronic device, the electrode structure comprising:
 a powdered electrode material; and   carbon nanotubes having a volume resistivity of not more than 2×10 −2  Ω·cm, wherein the average length of the carbon nanotubes based on electron microscopic observation is at least 1 μm.   
     
     
         2 . The electrode structure according to  claim 1 , wherein the G/D ratio of the carbon nanotubes, as measured by Raman spectroscopic analysis, is at least 50. 
     
     
         3 . The electrode structure according to  claim 1 , wherein the content of the carbon nanotubes is not more than 10 mass %. 
     
     
         4 . The electrode structure according to  claim 1 , wherein the electrode structure does not contain a resin binder. 
     
     
         5 . The electrode structure according to  claim 1 , wherein the electrode structure does not contain a current collector. 
     
     
         6 . The electrode structure according to  claim 1 , wherein the average aspect ratio of the carbon nanotubes is at least 100. 
     
     
         7 . The electrode structure according to  claim 1 , wherein the carbon nanotubes comprise single-walled carbon nanotubes. 
     
     
         8 . The electrode structure according to  claim 1 , wherein the electrode structure contains a positive electrode active material and/or a negative electrode active material as the electrode material. 
     
     
         9 . The electrode structure according to  claim 1 , wherein the electrode structure contains active carbon as the electrode material. 
     
     
         10 . The electrode structure according to  claim 1 , wherein the electrode structure contains a catalyst-supporting carbon as the electrode material. 
     
     
         11 . The electrode structure according to  claim 8 , wherein the electrode structure contains at least one compound capable of the reversible insertion and release of lithium ions as the active material. 
     
     
         12 . The electrode structure according to  claim 11 , wherein the compound comprises at least one oxide or phosphate containing lithium and a transition metal as constituent metal elements.