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Separators for alkaline electrochemical cells

  • US 7,931,981 B2
  • Filed: 10/20/2009
  • Issued: 04/26/2011
  • Est. Priority Date: 08/08/2003
  • Status: Expired due to Term
First Claim
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1. An electrochemical cell comprising:

  • an anode;

    a cathode comprising a cathode active material;

    at least one layer of a continuous polymer separator film between the anode and the cathode, the continuous polymer separator film comprising a polymer backbone, electrolyte-retaining side groups coupled to the backbone, and alkaline aqueous electrolyte retained therein; and

    ,an alkaline aqueous bulk electrolyte in fluid communication with the anode and the cathode, wherein substantially all of the fluid communication is through the continuous polymer separator film, and further wherein the continuous polymer has an Exclusion Value of at least 50%.

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