The effects of separators on the self-discharge behavior and the suppression of self-discharge by a sulfonated polyolefin separator were investigated with test cells. The experimental results indicate that a sulfonated polyolefin separator effectively suppresses the self-discharge reaction in nickel-metal hydride batteries. It is also found that a sulfonated polyolefin sheet does not necessarily need to be sandwiched by positive and negative electrodes to act as a separator; it can be placed anywhere within a cell to suppress the self-discharge reaction. The self-discharge reaction is considered to be suppressed by trapping redox shuttle substances, especially nitrogen-containing compounds, by the separator.
Research on Chemical Intermediates – Springer Journals
Published: Jan 1, 2006
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