Scientists in China have made a breakthrough in redox flow battery (RFB) technology, achieving an 87.9% energy efficiency and a cycling life of 850 cycles. This addresses critical limitations in existing polysulfide-iodide-based redox flow batteries (SIRFBs). The researchers designed a novel catalytic electrode, using a two-dimensional molybdenum disulfide (MoS2) nanosheet enhanced with single atoms of cobalt (Co) and sulfur vacancies (SVs). This material, called CoSA-VS/MoS2, optimized the interface electronic structure, boosted reactant adsorption capacity, and accelerated the kinetics of the redox couples. The resulting SIRFB demonstrated remarkable performance, with a peak power density of 95.7 mW cm-2 and an average energy efficiency of 76.5% at 30 mA cm-2 over 50 cycles. Additionally, the battery maintained stable operation for approximately 850 cycles at 10 mA cm-2. This development promises more efficient and durable energy storage solutions, with significant implications for the deployment of renewable energy sources.
China has developed a redox flow battery technology that boasts an impressive 87.9% efficiency rate, with the ability to sustain 850 full cycles without degradation.
