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利用超声浸渍技术在10 g.L-1Ce(NO3)3溶液中成功制得含有铈化合物的锌基复合粉,探讨了铈化合物在锌粉基体上的形成机制,并研究了锌基复合粉中铈化合物对锌电极的循环放电性能的影响。通过扫描电镜(SEM)、能谱分析(EDS)、X射线光电子能谱(XPS)和充放电循环测试对锌基复合粉进行表征与性能分析。结果表明:由Ce(OH)3/Ce(OH)4和Ce2O3/CeO2组成的铈化合物以颗粒形式良好地分散在锌粉基体上,用这种锌基复合粉作为模拟锌银电池的负极材料,其锌电极的容量衰减得到明显抑制,放电容量和循环寿命得到显著提高,尤其是其锌电极在50周期的放电容量仍可达到231.4 mAh.g-1,表明在锌粉基体上形成的铈化合物可以改善锌电极的电化学性能。
The zinc-based composite powder containing cerium compound was successfully prepared by ultrasonic impregnation in 10 gL-1Ce (NO3) 3 solution. The formation mechanism of cerium compound on zinc powder matrix was discussed. The effects of cerium compound Effect on the cyclic discharge performance of zinc electrode. The characterization and performance analysis of zinc-based composite powders were carried out by SEM, EDS, XPS and charge-discharge cycles. The results show that the cerium compound consisting of Ce (OH) 3 / Ce (OH) 4 and Ce2O3 / CeO2 is well dispersed in the form of particles on the zinc powder matrix. This zinc-based composite powder is used as the negative electrode material of the simulated zinc-silver battery , The capacity loss of zinc electrode was significantly inhibited, and the discharge capacity and cycle life were significantly improved. In particular, the discharge capacity of zinc electrode at 50 cycles could reach 231.4 mAh.g-1, indicating that cerium Compounds can improve the electrochemical performance of zinc electrodes.