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- W4300964607 abstract "Nickel-rich LiNixCoyMnzO2 (Ni-rich NCM) is a promising cathode material due to its higher energy density but suffers from low capacity retention. The degradation mechanism of NCM is complex and appears at the electrode-electrolyte interface. Damage to the NCM crystal and oxidation of the electrolyte occur simultaneously, and this oxidation is affected by the inherent electrode–electrolyte reactivity. Leakage currents are useful to investigate inherent reactivity, and these currents flow when the accumulated Li ions at the blocking interface fail to maintain the dielectric state. The catalytic characterization of inherent reactivity is evaluated through the number of charge carriers and the direction of the leakage current. In addition, the effects of the leakage current on the electrochemical reactions and material characterization are observed by performing in situ X-ray diffraction (in situ XRD). With alternating current (AC) voltage, Ni-rich NCM exhibits a larger leakage current than the other NCMs at higher frequencies. Consequently, in situ XRD quantitatively confirms that the leakage current forms a large passivation film and damages the overall NCM crystal. The proposed real-time analysis helps to distinguish the complex degradation of electrodes and electrolytes and to quantify their reactivity." @default.
- W4300964607 created "2022-10-04" @default.
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- W4300964607 date "2022-12-01" @default.
- W4300964607 modified "2023-10-02" @default.
- W4300964607 title "Real-time analysis of Ni-rich layered oxide-electrolyte reactivity by observing leakage currents" @default.
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- W4300964607 doi "https://doi.org/10.1016/j.electacta.2022.141285" @default.
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