The growing interest in rechargeable
magnesium batteries
(RMBs)
stems from the demands for energy storage technologies with safety,
sustainability, and high energy density. However, the ambiguous mechanism
of the Mg metal anode during the electrochemical and manufacturing
processes severely impedes the pursuit of superior performance. Those
commonly overlooked bottlenecks in pure Mg or Mg alloy metal anodes
should be emphasized and deserve more consideration. In this Review,
a brand-new perspective is emerging to reveal the opportunity for
overcoming the long-standing obstacles hindering the development of
RMBs. Herein, we comprehensively discuss the recent efforts to relieve
the interfacial incompatibility between Mg metal anodes and electrolytes,
including the pursuit of new electrolyte, interfacial modification,
mechanism exploration, etc. Additionally, we put forth an unconventional
research direction to promote the development of RMBs, namely exploring
Mg metal anodes in terms of their electrochemical and mechanical properties.
In closing, our proposals for addressing the key factors and intractable
issues with Mg metal anode are brought forward.