➀ Manganese-based lithium-ion batteries are being explored as a sustainable and cost-effective alternative to current nickel and cobalt-based batteries in EVs. ➁ A recent study introduced a monoclinic layered structure in LiMnO2 that significantly improves its energy density and performance. ➂ Challenges such as manganese dissolution are being addressed to pave the way for commercialization of these batteries in the EV market.