abstract |
PROBLEM TO BE SOLVED: To provide a dry electrode film having improved electrical characteristics and a method for producing the same. An apparatus and a method for forming an electrode film mixture are described. The apparatus for forming the electrode film mixture comprises a first source containing a solution containing a polymer such as polytetrafluoroethylene and a critical or supercritical fluid such as supercritical carbon dioxide, and a second component of the electrode film mixture. A second source, a mixer configured to receive the solution and the second component and form a slurry containing the solution and the second component, and the slurry to receive and depressurize the slurry to evaporate the critical fluid or supercritical fluid. And can include a decompressor configured to precipitate the dry polymer. |