Chemistry–mechanics–geometry coupling in positive electrode materials: a scale-bridging perspective for mitigating degradation in lithium-ion batteries through materials design

Abstract

The design of next-generation positive intercalation battery cathodes will leverage chemistry—mechanics—geometry coupling to mitigate stress, unlock more accessible storage capacity, and prolong cycle life.

The genesis and control of microcracks in nickel-rich cathode materials for lithium-ion batteries

“…Due to the variation in the local conductive network, NRO particles undergo distinct electrochemical evolution during the cycling process, which leads to a heterogeneous reaction. 65,66 As a result, some particles have more microcracks while others have fewer, as shown in Fig. 10a.…”

The master key: structural science in unlocking functional materials advancements

“…In addition, heterogeneous damage in metal-ion batteries has been analyzed (Xu et al, 2019;Santos et al, 2023;Lin et al, 2021;Li, Sharma et al, 2022). Utilizing a combination of advanced synchrotron X-ray tomography analysis and microstructure-resolved computational modeling, Xu et al (2019) studied the heterogeneous electrochemistry and mechanics within a composite cathode in commercial batteries.…”

“…(iii) The boundary lines between the Li metal and LiAl alloy seem to deform towards the LSPS layer (contrasting yellow solid lines with yellow dotted lines). (iv) Crack and fissure structures develop within the contorted region of the LSPS solid electrolyte (depicted as dark-gray regions).In addition, heterogeneous damage in metal-ion batteries has been analyzed(Xu et al, 2019;Santos et al, 2023;Lin et al, 2021;Li, Sharma et al, 2022). Utilizing a combination of advanced synchrotron X-ray tomography analysis and microstructure-resolved computational modeling,Xu et al (2019) studied the heterogeneous electrochemistry and mechanics within a composite cathode in commercial batteries.…”