Highly Efficient Conversion of Surplus Electricity to Hydrogen Energy Via Polysulfides Redox
Graphical abstract
Decoupled electrolysis of water is a promising strategy for peak load regulation of electricity. The key to developing this technology is to construct decoupled devices containing stable redox mediators and corresponding efficient catalysts, which remains a considerable challenge. Herein, we designed a high-performance device, using polysulfides as mediators and graphene-encapsulated CoNi as catalysts. It produced H2 with a low potential of 0.82 V at 100 mA/cm2, saving 60.2% more energy than direct water electrolysis.
