Aqueous Rechargeable Manganese/Iodine Battery
Publication Name
Batteries and Supercaps
Abstract
Carbon neutralization has promoted the identification of new types of energy storage devices. 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 additive 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 6 % 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. Overall, the AMIBs in this study preferred I2/I− conversion chemistry, yielding stable cycle stability, rate performance, and low capacity loss per cycle when compared to Manganese Ion Batteries (MIBs) which are based on Mn2+ intercalation chemistry.
Open Access Status
This publication is not available as open access
Funding Number
NRF‐2018R1A5A1025224
Funding Sponsor
National Research Foundation of Korea