High rate, thin film, bipolar nickel zinc battery

Details High rate, thin film, bipolar nickel zinc battery High rate, thin film, bipolar nickel zinc battery

H - Electricity

01

M

H01M 10/30 (2006.01) H01M 4/00 (2006.01) H01M 4/66 (2006.01)

Patent

CA 2380900

A high rate, nickel zinc cell has a nickel hydroxide positive electrode, a zinc negative electrode, an alkaline electrolyte, and a microporous separator, and is structured as a bipolar cell. A current collector, with the positive electrode at one side thereof is at one side of a current collector, andthe negative electrode is at the other side. The electrolyte contacts at least one of the positive electrode and the negative electrode and is contained by the separator. The current collector comprises a sheet copper substrate in contact with the zinc negative electrode; and a sheet nickel substrate is laminated to the copper current collector, in contact with the nickel hydroxide positive electrode. The nickel hydroxide positive electrode is applied in a thin film to the face of the sheet nickel substrate remote from the copper current collector. Typically, the ampere hour capacity of the zinc negative electrode is about five times that of the nickel hydroxide positive electrode. A battery may be formed with a series connection of at least two similar cells, and with a microporous separator being placed between contiguous cells. 11

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