Researchers led by Professor Dennis Leung from the Department of Mechanical Engineering at the University of Hong Kong (HKU) has discovered a new possibility—a rechargeable aqueous battery with a magnesium metal anode. The innovation opens a new direction for the development of post-lithium-ion batteries.

"With a high theoretical capacity and negative electrochemical potential, magnesium is an attractive anode material," said Professor Leung. "Magnesium is also non-toxic and earth-abundant."