Revisiting Phase Transformation Mechanisms in LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> High Voltage Cathodes with Operando Microdiffraction
نویسندگان
چکیده
Understanding the phase transition mechanisms of active materials inside Li-ion batteries is critical for rechargeability and optimizing power/energy density devices. In this work, high-energy microfocused X-ray diffraction used to measure in operando state-of-charge heterogeneities a high-voltage spinel (LiMn1.5Ni0.5O4, LMNO) cathode. The structure an material which resists complete delithiation studied move toward unlocking full storage capacity ion-conductive spinels. High-precision also reveals nonlinear coupling between strain lithiation state cathode at high voltages, suggests diagram more complex than previously assumed. depth-profiling shows that large through cross-section electrode are formed even low currents decoupling these gradients necessary study transitions detail.
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ژورنال
عنوان ژورنال: ACS materials letters
سال: 2022
ISSN: ['2639-4979']
DOI: https://doi.org/10.1021/acsmaterialslett.2c00787