New EV Battery Achieves Unprecedented 820 Wh/Kg Without Decay
Researchers at Yokohama National University (YNU) in Japan have developed a promising alternative to nickel and cobalt-based batteries for electric vehicles (EVs) by using manganese in the anode. This new battery, featuring a LiMnO2 electrode, offers a high-energy density of 820 watt-hours per kilogram (Wh kg-1), surpassing nickel-based batteries’ 750 Wh kg-1. Unlike previous manganese-based batteries, this new approach prevents voltage decay and shows no significant performance degradation.
The key breakthrough lies in a monoclinic layered domain within LiMnO2, which facilitates a crucial phase transition to a spinel-like structure, improving the electrode’s performance. The battery’s synthesis is straightforward and cost-effective, with no intermediary steps. Despite potential challenges like manganese dissolution, the researchers plan to address these with advanced electrolyte solutions and coatings. They believe their work could lead to a sustainable and competitive battery option for the EV industry, and they are optimistic about its commercial potential.