A high energy density Hydrogen/Vanadium (6 ​M HCl) system is demonstrated with increased vanadium concentration (2.5 ​M vs. 1 M), and standard cell potential (1.167 vs. 1.000 ​V) and high theoretical storage capacity (65 ​W h L⁻¹) compared to previous vanadium systems. The system is enabled through the development and use of HER/HOR catalysts with improved chemical stability towards the halogen-containing electrolyte within which the usual catalyst (Pt/C) is shown to quickly degrade during potential hold experiments. The implementation of an Ir/C catalyst at the negative side enables a system with high achievable energy density of 45 ​W ​h ​L⁻¹ at 75 ​mA ​cm⁻² associated with 67% electrolyte utilization. Based on such a promising performance, the system here presented could be a suitable solution for medium and large-scale energy storage with lower cost and volume footprint than existing batteries, particularly all-vanadium RFBs.

证明了高能量密度的氢/钒（6 M HCl）系统具有增加的钒浓度（2.5 M对1 M），标准电池电势（1.167对1.000 V）和高理论存储容量（65 w ^ H L ^-1）相比于以前的系统钒。通过开发和使用具有改善的对含卤素电解质的化学稳定性的HER / HOR催化剂，可以使该系统得以实现，在该含卤素电解质中，常规催化剂（Pt / C）在势能保持实验中会迅速降解。在负极实施Ir / C催化剂可使系统在75 mA·cm ^{-2的条件下}具有高达45W·h·L ^-1的高能量密度与67％的电解质利用率相关。基于这种有前途的性能，此处介绍的系统可能是一种适合中型和大型能量存储的解决方案，其成本和体积足迹比现有电池（尤其是全钒RFB）低。