Developing high capacity yet stable cathodes is key to advancing Li-ion battery technologies. Now, a new metal oxide cathode that is rich in Li with a gradient in Li concentration is shown to be stable to O2 release leading to long cycle life and high capacity.
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Toney, M.F. Li gradients for Li-rich cathodes. Nat Energy 4, 1014–1015 (2019). https://doi.org/10.1038/s41560-019-0522-z