Data for: Charge/Discharge and Cycling Performance of Flexible Carbon Paper Electrodes in a Regenerative Hydrogen/Vanadium Fuel Cell

The regenerative hydrogen/vanadium fuel cell (RHVFC) is investigated with Freudenberg carbon paper electrodes (CPs). Along with thermal treatment, the Freudenberg CPs are also treated with reduced graphene oxide (rGO) using electrophoretic deposition at 300 V. The rGO modified CP results in 25% higher power density than its untreated counterpart under the same operating conditions. In comparison to the first preliminary study, the power density reported herein is more than four times higher. Additionally, the Freudenberg CPs modified with heat treatment followed by rGO deposition facing the membrane (rGOHTFM) provide the best electrolyte discharge utilization (UE) of 99%, followed by untreated (98%) and heat treated samples (97%) at 50 mA cm-2. The rGOHTFM also record high charge and discharge energy efficiencies (ηE) of 93% at the same current density, which is slightly higher than untreated CPs (ηE = 91%). Cycling the system 10 times also results in higher ηE and UE for rGOHTFM CP (ηE = 92% and UE = 99% on average) in comparison to untreated electrodes (ηE = 86% and UE = 97% on average). In comparison the widely investigated SGL 10AA CP has lower efficiencies and utilization as expected (ηE = 74% and UE = 83% on average).

本研究探讨了再生式氢/钒燃料电池（RHVFC），并使用弗劳恩霍夫碳纸电极（CP）进行实验。在热处理的基础上，弗劳恩霍夫CP电极还通过300伏的静电沉积法处理了还原氧化石墨烯（rGO）。经rGO修饰的CP电极在相同的工作条件下，其功率密度比未经处理的电极提高了25%。与首次初步研究相比，本研究所报告的功率密度提高了四倍以上。此外，经过热处理并随后在面向膜面沉积rGO（rGOHTFM）修饰的弗劳恩霍夫CP电极，实现了最佳的电解质放电利用效率（UE）为99%，其次为未经处理的电极（98%）和仅经过热处理的样品（97%），均在50 mA cm-2的电流密度下进行测试。在相同的电流密度下，rGOHTFM电极还记录了高达93%的充放电能量效率（ηE），略高于未经处理的CP电极（ηE = 91%）。系统循环10次后，rGOHTFM CP电极的ηE和UE也有所提高，平均ηE为92%，UE为99%，相比之下，未经处理的电极的平均ηE为86%，UE为97%。与此相比，广泛研究的SGL 10AA CP电极的效率和利用率较低，如预期所示，平均ηE为74%，UE为83%。