Despite the dominance of pumped hydroelectricity in the market of grid energy storage, it is limited by the suitable site selection and footprint impact. Large-scale energy storage is of significance to the integration of renewable energy into electric grid. Publication Date: Research Org.: SLAC National Accelerator Lab., Menlo Park, CA (United States) Sponsoring Org.: USDOE Office of Science (SC), Basic Energy Sciences (BES) OSTI Identifier: 1814176 Grant/Contract Number: AC02-76SF00515 KY2060000150 Resource Type: Journal Article: Accepted Manuscript Journal Name: Advanced Functional Materials Additional Journal Information: Journal Volume: 31 Journal Issue: 37 Journal ID: ISSN 1616-301X Publisher: Wiley Country of Publication: United States Language: English Subject: 08 HYDROGEN 25 ENERGY STORAGE 36 MATERIALS = , for Physical Sciences at the Microscale, Division of Nanocatalysis and Energy Conversion of Science and Technology of China, Hefei (China). of Science and Technology of China, Hefei, Anhui (China).School of Chemistry and Materials Science, Dept. Stanford Institute for Materials and Energy Science (SIMES) of Materials Science and Engineering SLAC National Accelerator Lab., Menlo Park, CA (United States). This study paves the way towards the industrialization of economically effective, high-power density, and long-term I 2-H 2 batteries for large-scale energy storage applications. The current battery design exhibits robust electrochemical performance irrespective of acidic, neutral, and alkaline electrolyte systems. Additionally, the static aqueous I 2-H 2 battery displays a volumetric capacity of 15.5 Ah L -1 along with good self-healing capability towards cell overcharge. The working chemistry of the battery involves I 2/I -solid-liquid reactions occurring over the cathode along with H 2/H 2O gas-liquid reactions at the anode, achieving a high rate performance of 100 C and long-lasting stability of over 60 000 cycles. Here, a novel high-performance aqueous iodine-hydrogen gas (I 2-H 2) battery using iodine as cathode and hydrogen gas as the electrocatalytic anode in environmentally benign aqueous electrolytes is reported. Coupling advanced cathode chemistries with hydrogen gas anode is an emerging and exciting area of research. Rechargeable hydrogen gas batteries are highly desirable for large-scale energy storage because of their long life cycle, high round trip efficiency, fast reaction kinetics, and hydrogen gas profusion.
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