▎ 摘　　要

NOVELTY - A composite (10) for electrochemical device (1) comprises core portion (11) comprising carbon nanotubes of a liquid crystal phase oriented in a predetermined direction and having a fiber shape; and sheath portion (12) formed on the core portion and including a conductive polymer. USE - A composite for electrochemical device (claimed). ADVANTAGE - The electrochemical device has good flexibility and excellent electrochemical properties. Since no separate adhesive is used in forming the composite, an electrochemical device without deterioration of physical and chemical properties can be obtained. The electrochemical device can be manufactured simply and within a short time, which can greatly contribute to its mass production. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) electrochemical device comprising a current collector provided on an active electrode and having a fiber shape, electrolyte layer provided on the composite, and active electrode provided on the electrolyte layer; and (2) preparation of composite for electrochemical device which involves preparing a dispersion in which liquid crystal carbon nanotubes are dispersed, manufacturing a core portion having a fiber shape by orienting the carbon nanotubes in a predetermined direction, and forming a sheath portion including a conductive polymer on the core portion. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the electrochemical device. Electrochemical device (1) Composite (10) Core (11) Sheath (12) Electrolyte layer (20)