(684i) Plating/Stripping Performance of Different Substrates in Magnesium Borohydride Solution Conference: AIChE Annual MeetingYear: 2013Proceeding: 2013 AIChE Annual MeetingGroup: Materials Engineering and Sciences DivisionSession: Materials for Energy Storage Time: Thursday, November 7, 2013 - 1:18pm-1:34pm Authors: Saraidaridis, J. D., University of Michigan Vardar, G., University of Michigan Sleightholme, A. E. S., University of Michigan Monroe, C. W., University of Michigan Siegel, D. J., University of Michigan Plating/Stripping Performance of Different Substrates in Magnesium Borohydride Solution James D. Saraidaridis1, Gulin Vardar2, Alice E. S. Sleightholme1, Donald J. Siegel3, Charles W. Monroe1 1Department of Chemical Engineering, University of Michigan 2Department of Materials Science and Engineering, University of Michigan 3Department of Mechanical Engineering, University of Michigan 2300 Hayward St Ann Arbor, MI 48109 High theoretical energy densities have attracted many researchers to metal-oxygen batteries in search of post-Li-ion technologies. The Mg-O2 chemistry offers higher theoretical volumetric energy densities than popular Li-O2 chemistry , which is important in constrained-volume applications like electric vehicles. A magnesium system has large potentials associated with oxygen reactions forming MgO (2.95V vs. Mg/Mg2+) and MgO2 (2.91V vs. Mg/Mg2+). The largest hurdle to demonstrating rechargeable Mg-O2 batteries remains the development of suitable electrolytes that allow plating/stripping of Mg metal, prevent side reactions at potentials dictated by the plating and oxygen reactions, and are chemically inert to O2. Researchers recently demonstrated the use of magnesium borohydride (Mg(BH4)2) in DME as an electrolyte in a Mg-ion battery . We sought to explore the performance of this electrolyte with various electrode substrates. The use of microelectrodes and a consistent dimensionless scan rate allows a fair comparison between electrodes of different material and radii. While no substrate was found stable across the relevant potentials for Mg-O2 reaction, there is a clearly demonstrated difference in the substrate activity for the Mg plating/stripping reaction.  C. Zu, H. Li. (2011). Energy & Environmental Science. 4: 2614-2624.  K. Abraham, Z. Jiang. J. Electrochem. Soc. 143: 1-5.  Mohtadi, M. Matsui, T. Arthur, S. Hwang. Angewandte Chemie. 51: 9780-9783.