%0 Journal Article
%T Understanding and Overcoming the Challenges Posed by Electrode/Electrolyte Interfaces in Rechargeable Magnesium Batteries
%A Fuminori Mizuno
%A Nikhilendra Singh
%A Timothy S. Arthur
%A Mayandi Ramanathan
%A Aadil Benmayza
%A Per-Anders Glans
%A Jinghua Guo
%J Frontiers in Energy Research
%D 2014
%I Frontiers Media
%R 10.3389/fenrg.2014.00046
%X Magnesium (Mg) battery technologies have attracted attention as a high energy-density storage system due to the following advantages: (1) potentially high energy-density derived from a divalent nature, (2) low-cost due to the use of an earth-abundant metal, and (3) intrinsic safety aspect attributed to non-dendritic growth of Mg. However, these notable advantages are downplayed by undesirable battery reactions and related phenomena. As a result, there are only a few working rechargeable Mg battery systems. One of the root causes for undesirable behavior is the sluggish diffusion of Mg2+ inside a host lattice. Another root cause is the interfacial reaction at the electrode/electrolyte boundary. For the cathode/electrolyte interface, Mg2+ in the electrolyte needs a solvation¨Cdesolvation process prior to diffusion inside the cathode. Apart from the solid electrolyte interface (SEI) formed on the cathode, the divalent nature of Mg should cause kinetically slower solvation¨Cdesolvation processes than that of Li-ion systems. This would result in a high charge-transfer resistance and a larger overpotential. On the contrary, for the anode/electrolyte interface, the Mg deposition and dissolution process depends on the electrolyte nature and its compatibility with Mg metal. Also, the Mg metal/electrolyte interface tends to change over time, and with operating conditions, suggesting the presence of interfacial phenomena on the Mg metal. Hence, the solvation¨Cdesolvation process of Mg has to be considered with a possible SEI. Here, we focus on the anode/electrolyte interface in a Mg battery, and discuss the next steps to improve the battery performance.
%K magnesium battery
%K electrode/electrolyte interface
%K Mg metal
%K anode
%K intermediate species
%K solvation¨Cdesolvation process
%U http://www.frontiersin.org/Journal/10.3389/fenrg.2014.00046/abstract