| 摘要 |
PROBLEM TO BE SOLVED: To enhance the strength at which the external connection terminals of a sheet type electrochemical element such as a lithium ion battery are secured to a sheath. SOLUTION: This electrochemical element includes a structure whereby an electrode-electrolyte structure having electrodes placed on both sides of a polymer solid electrolyte is sealed in a sheath 6, and the inner surface of the sheath 6 is formed of a polyolefin film 6b. Each side of each external connection terminal 7, 8 connected to the electrodes has an acid-denatured polyolefin 9 applied to its portion sealed by the sheath, and the sealed portion is heat sealed. |
