Electrochemical cells construction comprising electrodes and spacers.

摘要

An electrochemical construction comprises at least one stack of cells (10) each comprising a separator (28) disposed between two electrodes (29). Each electrode comprises a plastics sheet having an electrically-conductive mid-portion (33) and electrically non-conductive side portions. Each separator comprises a frame (31) disposed about a microporous web (30) which is thinner than the frame (31) and provides ionic communication between cell compartments defined on each side of the web (30). The web is imperforate and has projections (32) on each side which separate the respective electrodes from the web. The projections are less electrically conductive than the web, or non-conductive, and the projections on one side of the web are opposite projections on the other side of the web (30).