The degradation mechanisms of nickel-rich layered oxides, used as cathode active materials in lithium-ion batteries, are investigated combining surface area determination by krypton-gas physisorption (Kr-BET), electrochemical impedance spectroscopy (EIS), and on-line electrochemical mass spectrometry (OEMS). This work provides quantitative understanding of particle cracking as well as of the onset and the extent of gas evolution, elucidated for both the poly- and the single-crystalline particle morphology.
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The degradation mechanisms of nickel-rich layered oxides, used as cathode active materials in lithium-ion batteries, are investigated combining surface area determination by krypton-gas physisorption (Kr-BET), electrochemical impedance spectroscopy (EIS), and on-line electrochemical mass spectrometry (OEMS). This work provides quantitative understanding of particle cracking as well as of the onset and the extent of gas evolution, elucidated for both the poly- and the single-crystalline particle...
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