低贵金属含量催化剂的高功率密度、高效率氢-氯再生燃料电池
A High Power Density, High Efficiency Hydrogen-Chlorine Regenerative Fuel Cell with a Low Precious Metal Content Catalyst
摘要：
我们报道了具有氯电极的氢-氯电化学电池的性能，该氯电极采用低贵金属含量的合金氧化物电催化剂（Ru_0.09Co_0.91）_3O_4作为氯电极。该电池采用商用氢燃料电池电极，并以电流和电解模式通过Nafion膜传输质子。峰值电流功率密度超过1 W·cm^-2，是先前文献值的两倍。氯电极的贵金属负载量低于0.15 mg Ru cm^-2。几乎没有观察到活化损失，使电池在90%的电压效率下以接近0.4 W cm^-2的功率运行。我们报告了流体压力、电解质酸浓度和氢侧加湿对整体电池性能和效率的影响。我们的结果与Rugolo等人的模型的比较[Rugolo等人，J.电化学索科，2012，159，B133]指出了进一步性能增强的方向。这里报告的性能使这些设备在碳封存和电网规模的电能存储应用的承诺。
英文摘要：
We report the performance of a hydrogen-chlorine electrochemical cell with a chlorine electrode employing a low precious metal content alloy oxide electrocatalyst for the chlorine electrode: (Ru_0.09Co_0.91)_3O_4. The cell employs a commercial hydrogen fuel cell electrode and transports protons through a Nafion membrane in both galvanic and electrolytic mode. The peak galvanic power density exceeds 1 W cm^-2, which is twice previous literature values. The precious metal loading of the chlorine electrode is below 0.15 mg Ru cm^-2. Virtually no activation losses are observed, allowing the cell to run at nearly 0.4 W cm^-2 at 90% voltage efficiency. We report the effects of fluid pressure, electrolyte acid concentration, and hydrogen-side humidification on overall cell performance and efficiency. A comparison of our results to the model of Rugolo et al. [Rugolo et al., J. Electrochem. Soc., 2012, 159, B133] points out directions for further performance enhancement. The performance reported here gives these devices promise for applications in carbon sequestration and grid-scale electrical energy storage.
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