TOKYO -- The limitations of lithium-ion batteries, which have been powering our portable gadgets for three decades now, are becoming clear, and the race to replace them is well underway.
Technology
Japan, the EU and U.S. race to replace the lithium-ion battery
Researchers push the energy density of magnesium, zinc and other materials
Tokyo Metropolitan University professor Kiyoshi Kanamura has a battery that uses manganese oxide in the positive electrode and a magnesium metal in the negative electrode.
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