M. Saiful Islam

Oct 17, 2024 | nature.com | Peter M. Csernica |Kit McColl |Diego Rivera |David Shapiro |M. Saiful Islam

AbstractDelithiation of layered oxide electrodes triggers irreversible oxygen loss, one of the primary degradation modes in lithium-ion batteries. However, the delithiation-dependent mechanisms of oxygen loss remain poorly understood. Here we investigate the oxygen non-stoichiometry in Li1.18–xNi0.21Mn0.53Co0.08O2–δ electrodes as a function of Li content by using cycling protocols with long open-circuit voltage steps at varying states of charge.