Vaiyapuri Soundharrajan, Duong Tung Pham, Junji Piao, Subramanian Nithiananth, Jung Ho Kim, Jaekook Kim
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Aqueous iodine batteries (AIBs) with reversible iodine redox activity are considered a viable candidate for stationary energy storage units and thus have recently drawn extensive research interest. Herein, we introduce an aqueous manganese iodine battery (AMIB), utilizing sodium iodide (NaI) as a redox-active in the Mn(ClO4)2 (NMC) electrolyte, activated carbon (AC) as a redox host and Mn ions as the charge carrier. Taking advantage of enhanced kinetics facilitated by I2/2I- redox activity, our suggested AMIBs can be electrochemically charged/discharged with only a 5% loss in capacity after 2,000 cycles at a low current density of 0.3 A g-1 in an AC||AC coin cell configuration. Moreover, the AC||Zn-Mn hybrid full-cell configuration is also established with AC and a Zn-Mn anode involving the NMC electrolyte, which retains a high energy of 185 Wh kg-1 at a specific power of 2,600 W kg-1.
期刊介绍:
Electrochemical energy storage devices play a transformative role in our societies. They have allowed the emergence of portable electronics devices, have triggered the resurgence of electric transportation and constitute key components in smart power grids. Batteries & Supercaps publishes international high-impact experimental and theoretical research on the fundamentals and applications of electrochemical energy storage. We support the scientific community to advance energy efficiency and sustainability.