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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium REWAS 2022: Energy Technologies and CO2 Management
Presentation Title Design of a Molten Salt Metal-air Battery with High-energy Density
Author(s) Mahya Shahabi, Nicholas Masse, Hongyi Sun, Lucien Wallace, Adam Powell, Yu Zhong
On-Site Speaker (Planned) Mahya Shahabi
Abstract Scope Decarbonization of long-haul transportation i.e. ships and trains is among the toughest challenges toward eliminating greenhouse emissions, but metal-air batteries have extraordinary potential to meet this challenge. More specifically, Mg-air batteries have the potential for 30-40 times the energy of lithium-ion batteries at very high efficiency, and their Mg anode and molten salt materials are abundant in seawater. The two main criteria for these batteries are stability of the cathode material and removal of MgO product from the electrolyte through directional solidification. This talk will present experimental and modeling results for a novel molten salt magnesium-air battery with an MgCl₂-NaCl-KCl-MgO electrolyte operating at 420-620C. O⁻ dissolves at the cathodes and Mg⁺ at anodes. Experimental results show 1.9V open-circuit voltage, which is the highest to date for an Mg-air battery. Modeling shows up to 1.17 W/cm at 73% efficiency and 2.89 W/cm at 36% efficiency. This work illustrates the proof of concept of Mg-air batteries and discusses the requirements for larger-scale cells.
Proceedings Inclusion? Planned:
Keywords Energy Conversion and Storage, Environmental Effects, Solidification


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