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A large potential hysteresis occurs between the charge and discharge reactions of Li1.2NixMn0.8−xO2 (x=0.2). As the nickel content x was increased through x=0.2, 0.3, and 0.4, the potential hysteresis was suppressed. The results obtained by X-ray absorption fine structure indicate that, for Li1.2NixMn0.8−xO2 (x=0.2), the redox of the nickel, manganese, and oxygen contributed to the charge-discharge...
The mechanism responsible for the large potential hysteresis between charge and discharge reactions in Li1.2Ni0.13Mn0.54Co0.13O2 was investigated. The relationship between open circuit potential and the oxidation state of each transition metal during charge-discharge processes was evaluated. The results indicated that the electrochemical reaction in Li1.2Ni0.13Mn0.54Co0.13O2, which can be expressed...
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