| abstract |
Provided is a filter, comprising: a chelate film, including a chelate capable of forming, with metallic ions included in an electrolyte in a battery, a complex; and at least either an adsorbent film including an adsorbent substance capable of adsorbing the complex formed by the metallic ions and the chelate, or an acidic solid film including an acidic solid substance capable of reacting with the electrolyte and reducing the concentration of hydrogen ions in the electrolyte. An embodiment comprising the adsorbent film, the chelate film, and the acidic solid film is preferred. |