掺钴MnO2电极的电化学电容行为研究

功能材料与器件学报 , 2003, 9(3): 267-271. doi: 10.3969/j.issn.1007-4252.2003.03.007

掺钴MnO2电极的电化学电容行为研究

刘献明 ^1, , 张校刚 ^2, , 包淑娟 ^3, , 王永刚 ^4,

1.新疆大学应用化学研究所,乌鲁木齐,830046

2.新疆大学应用化学研究所,乌鲁木齐,830046

3.新疆大学应用化学研究所,乌鲁木齐,830046

4.新疆大学应用化学研究所,乌鲁木齐,830046

基金项目: 国家自然科学基金(50143023) 中国科学院"西部之光"人才培养计划

关键词：电化学电容器 , 超级电容器 , 复合电极 , 比电容

Study on capacitance performance of MnO2 electrodes chemically doped with Co3+

采用化学共沉淀法制备了超级电容器电极材料化学掺杂 Co的 MnO2电极,借助 XRD测试对电极材料进行了物理结构表征,表明掺 Co量影响材料的晶体结构和活性.电化学测试结果得出化学掺杂的配比对电化学性能影响很大,掺杂量为 n(Co):n(Co+Mn)大于或小于 0.1时,其循环伏安、充放电和电容特性较差.而适量的掺入 Co,改善了电极的电容性能,降低了电极内阻,提高了活性物质的利用率,并使得电极能够在大电流下进行充放电.经 1000次循环,适量掺杂的 MnO2电极比未掺杂的 MnO2电极具有更高的电容性能,掺杂的 MnO2电极循环性能相对较差,但是其比电容仍然大于未掺杂 MnO2电极.

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掺钴MnO2电极的电化学电容行为研究

Study on capacitance performance of MnO2 electrodes chemically doped with Co3+

参考文献