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采用直接沉淀法制备纳米ZnO,并将其与CNTs混合作为镍氢电池正极添加剂研究其对镍氢电池正极电化学性能的影响。结果表明:在0.2C低倍率放电制度下,混合添加剂电极放电容量保持率都很不错,其中添加4%ZnO(质量分数)的电极表现出最高的放电容量,能到达301mAh/g,经过40次循环后,仍然就有292mAh/g,纳米ZnO在低倍率放电制度下表现出良好的性能;在1C大倍率放电制度下,混合添加剂电极放电容量都出现较大程度的衰减,但是添加3%纳米ZnO和1%CNTs的电极放电容量最高,到达第40次循环时,放电容量为212mAh/g,CNTs在高倍率放电制度下表现出良好的性能。
The nano-ZnO was prepared by direct precipitation method and mixed with CNTs as the positive additive of Ni-MH battery to study its influence on the electrochemical performance of Ni-MH battery. The results show that the discharge capacity retention rate of mixed additive electrode is very good under 0.2C low discharge rate, in which the electrode with 4% ZnO shows the highest discharge capacity, reaching 301mAh / g, and after 40 times After cycling, there is still 292mAh / g, nano-ZnO showed good performance under the low-rate discharge system; the discharge capacity of the mixed additive electrode showed a greater degree of attenuation under 1C high-rate discharge system, The discharge capacity of ZnO and 1% CNTs is the highest, reaching the discharge capacity of 212mAh / g at the 40th cycle. The CNTs exhibited good performance under high-rate discharge.