Abstract
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.
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Shinyama, K., Harada, Y., Maeda, R. et al. Effect of separators on the self-discharge reaction in nickel-metal hydride batteries. Res Chem Intermed 32, 447–452 (2006). https://doi.org/10.1163/156856706777973763
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DOI: https://doi.org/10.1163/156856706777973763