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Issue 8, 2018
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High-voltage performance of concentration-gradient Li[Ni0.6Co0.2Mn0.2]O2 layered oxide cathode materials for lithium batteries

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Abstract

High-voltage performance concentration-gradient Li[Ni0.6Co0.2Mn0.2]O2 (CG-NCM622) layered oxide cathodes consisting of Li[Ni0.8Co0.1Mn0.1]O2 cores and stable outer layers of Li[Ni1/3Co1/3Mn1/3]O2 were synthesized via co-precipitation. CG-NCM622 showed structural stability and excellent electrochemical performances compared to Li[Ni0.8Co0.1Mn0.1]O2. Results of charge and discharge testing illustrate that CG-NCM622 delivered an initial discharge capacity of 195.6 mA h g−1 at 1C in the voltage window of 2.8–4.6 V, with the corresponding capacity retention of 90% after 100 cycles. The cathode based on this material had superior rate capabilities of 167.6 mA h g−1 at 2 C and 153.1 mA h g−1 at 5 C.

Graphical abstract: High-voltage performance of concentration-gradient Li[Ni0.6Co0.2Mn0.2]O2 layered oxide cathode materials for lithium batteries

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Publication details

The article was received on 13 Dec 2017, accepted on 27 Feb 2018 and first published on 02 Mar 2018


Article type: Paper
DOI: 10.1039/C7NJ04936F
Citation: New J. Chem., 2018,42, 5868-5874
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    High-voltage performance of concentration-gradient Li[Ni0.6Co0.2Mn0.2]O2 layered oxide cathode materials for lithium batteries

    X. Chen, X. Jia, Y. Qu, D. Li, D. Chen and Y. Chen, New J. Chem., 2018, 42, 5868
    DOI: 10.1039/C7NJ04936F

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