Electrode for secondary battery and production process for the same and secondary battery

摘要

To provide an electrode for secondary battery, electrode which can materialize secondary batteries that are adapted into producing high output and additionally whose durability is high.;It is characterized in possessing an electrode material that has an active-material powder 11, a conductive material 12 being formed of a carbonaceous material, and being adhered to a surface of said active-material powder 11, and fibrous conductive materials 13 being bonded to said conductive material 12. First of all, it becomes feasible to maintain the electric connection between the active-material powder and the conductive material stably by adhering the conductive material to a surface of the active-material powder. Further, the fibrous conductive materials are bonded to the conductive material that is adhered to a surface of the active-material powder. It is feasible to maintain the electric connection by getting the fibrous conductive materials entangled to each other. That is, it is feasible to keep the electric connection even when strains occur in the electrode material, because the fibrous conductive materials absorb the strains to keep the mutual contacts; even if large strains occur, it is possible to maintain the electric connection, because it is not disconnected compared with that in conventional conductive materials.

主权项

1. An electrode for secondary battery, wherein the electrode includes an electrode material having:
an active-material powder for positive electrode; a conductive material being formed of a carbonaceous material, and being adhered to a surface of said active-material powder; and fibrous conductive materials being bonded to said active-material powder and said conductive material; wherein a specific surface area of said active-material powder, to whose surface said conductive material is adhered, is 1 m2/g or more; and wherein said conductive material has at least one covalent bond with said active material powder, and/or with said fibrous conductive materials.