NaBiO3的固相合成及其对二氧化锰电化学性质的影响

采用固相氧化反应,制备了高纯度的NaBiO3,用于掺杂改性二氧化锰电极。通过恒流放电实验和循环伏安测试,研究了掺杂碱性二氧化锰电极和掺杂碱锰电池的电化学性能,初步探讨了反应机理。实验结果表明,掺杂量在1~10 % 之间对MnO2电极有很好的改性作用。NaBiO3掺杂的MnO2电极比纯MnO2电极的放电电压升高100~150 mV,放电容量提高72%以上。NaBiO3掺杂的MnO2电极比掺杂Bi2O3电极有着更高的放电电压和放电容量。

Synthesis of NaBiO3 by solid-phase reaction and its influence on MnO2 electrodes

NaBiO3 was prepared successfully by solid-phase reaction and used to modify MnO2 electrodes. Electrochemical properties of MnO2 electrodes modified by NaBiO3 were studied by means of constant current discharge and CV experiments. The experimental results indicate that the optimum ratio of NaBiO3 additives is 1%~10%. NaBiO3 modified MnO2 electrodes provide 100~150mV discharge voltage and 72% discharge capacity higher than pure manganese dioxide electrodes. The MnO2 electrode doped with NaBiO3 is more effective than that with Bi2O3.