通过液相法制备了α相和γ相组成的纤维状 MnO2电极材料,并以琼脂为基体,通过聚丙烯 酰胺 (PAM)改性,制备了新型超级电容器隔膜材料.当 PAM含量达到 800ppm时,改性琼脂膜的吸 液率与保液率分别为 400.1%和 335.1%,且隔膜韧性也得到改善.应用此隔膜的 MnO2/C超级电 容器放电比容量可达 23.4F/cm3,比琼脂膜提高了 49%,此时 ESR仅为 54 mΩ,同时千次循环容量 衰减幅度仅为 10%.
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