Journal
ENERGY STORAGE MATERIALS
Volume 42, Issue -, Pages 464-469Publisher
ELSEVIER
DOI: 10.1016/j.ensm.2021.07.050
Keywords
Aqueous battery; Prussian blue analogues; Hydrogen gas anode; Hybrid battery; Large-scale energy storage
Funding
- USTC [KY2060000150]
- USTC Center for Micro and Nanoscale Research and Fabrication
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The new Prussian blue analogues-hydrogen gas hybrid battery systems show excellent performance with different cations operating the cathodes and hydrogen gas operating the anode, demonstrating promising competitive candidates for large-scale energy storage applications.
Aqueous rechargeable batteries show promising prospects in large-scale energy storage owing to their low cost and high safety. Compared to single ion batteries, aqueous hybrid batteries have been receiving extensive interests in constructing high-performance electrode systems. In this work, we build new Prussian blue analogues-hydrogen gas (PBA-H-2) hybrid battery systems in which PBA-based cathodes operate by different cations (Na+, K+ or NH4+) intercalation chemistry and a hydrogen gas anode operates by electrocatalytic hydrogen evolution/oxidation reactions. The assembled PBA(Na+)-H-2 hybrid battery delivers an excellent rate performance of 100 C and long cycling lifetime with capacity retention of 92% after 25,000 cycles. In addition, the PBA(K+)-H-2 hybrid battery delivers superior current rate of 100 C and long cycling stability with capacity retention of 88% after 10,000 cycles. This work demonstrates a class of hybrid hydrogen gas batteries with tunable storage chemistries, showing promises as competitive candidates for large-scale energy storage applications.
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