Tracing Resistances of Anion Exchange Membrane Water Electrolyzer during Long-term Stability Tests
- Journal
- Journal of Electrochemical Science and Technology
- Year
- 2021
- File
- Tracing Resistances of Anion Exchange Membrane Water Electrolyzer during Long-term Stability Tests.pdf (2.2M) 4회 다운로드 DATE : 2021-08-18 14:50:53
Impedance spectra were regularly measured every ~ 100 h, and changes in the ohmic and non-ohmic resistance were traced as a function of time.
While there was relatively little change in the I–V curves and the total cell resistance during the long-term test,
we observed various electrochemical phenomena in the cell: 1) initial activation with a decrease in both ohmic and non-ohmic resistance;
2) momentary and non-permanent bubble resistance (non-ohmic resistance) depending on the voltage bias,
and 3) membrane degradation with a slight increase in the ohmic resistance.
Thus, the regular test protocol used in this study provided clear insights into the performance degradation (or improvement) mechanism of AEMWE cells."