摘要
利用固相配位化学反应制备了纳米ZnO粉体 ,借助XRD、TEM进行了表征 ,并采用循环伏安法和循环充放电法对电化学性能进行了分析。循环伏安测试表明 ,在较慢扫速 (1mV s)下 ,不同组成电极的峰形相差较大 ,添加 5 0 %纳米ZnO的混配电极展示出良好的循环可逆性。恒流充放电测试结果表明 ,添加 5 0 %的ZnO对锌电极具有较好的改性作用 ,提高了锌电极的循环充放电性能 ,但纳米ZnO对锌电极的改性效果明显优于普通粒径ZnO。在循环充放电第 2 5周和 3 0周时放电容量分别为 2 2 0mA·h g和 1 98mA·h g。
ZnO nanoparticles was prepared successfully by solid phase coordination chemistry reaction and characterized by XRD and TEM techniques. The results of CV testing indicated that the peak shapes in CV diagrams were differed for the three kinds of electrodes when the scan rate was 1mV/s. The mixture electrode (sample D) that ZnO nanoparticles additives were 50% exhibited remarkable cyclic reversibility. The results indicated that the optimum ratio of ZnO additives were 50% by means of constant current charge-discharge. The rechargeability of the Zn electrode could be improved. But the ZnO nanoparticles was more effective in modifying Zn electrode than the common ZnO particles. Its discharge capacity at 25th and 30th charge-discharge cycle achieves 220mA·h/g and 198mA·h/g, respectively.
出处
《化学通报》
CAS
CSCD
北大核心
2005年第3期204-208,共5页
Chemistry
