锌皮在一次Zn-Ag_2O电池中的参比性能研究

Performance of Zinc Reference Electrode for Zn-Ag_2O Primary Battery

通过电化学方法在10℃条件下测试了一次Zn-Ag2O电池材料测试过程中使用的锌皮参比电极的性能。在KOH溶液中浸泡10 min后,锌电极能够提供稳定的(-1555±5)mV左右的参比电极电位,极化曲线的拟合结果显示随时间的延长腐蚀电流没有发生显著的变化,保持在2×10-5A/cm2数量级,电化学阻抗谱图各阶段容抗弧实部ZRe和虚部ZIm值变化均不大。测试结果表明,锌电极在7 mol/L的KOH溶液中长时间的腐蚀反应速率变化不大,能够提供稳定的参比电极电位,可以作为Zn-Ag2O电池材料测试及某些碱性电解质中电化学测试的参比电极使用。

Electrochemical methods were applied to investigate the performance of zinc reference electrode in Zinc-Silver oxide primary battery at 10℃, which was constructed for trial of materi- als. After 10 minutes immersion in KOH solution, Zn electrode displayed a steady potential around （-15554±5） mV, corrosion current varied little which maintained at 2×10-SA/cm2 order, and resistances ZRo and ZIm in the capacitive arc of the AC impedance altered little. The results indicated that zinc electrode sustained small corrosion rate for long time immersion in 7 mol/L KOH solu- tion, which provided a stable electrode potential and could be used as reference electrode in mea- surements such as trial of materials in Zinc-Silver oxide battery and other electrochemical tests in alkaline electrolytes.