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Issue 34, 2017
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An optimized Al2O3 layer for enhancing the anode performance of NiCo2O4 nanosheets for sodium-ion batteries

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Abstract

Herein, an ultrathin Al2O3 layer was coated onto NiCo2O4 nanosheets via an atomic layer deposition (ALD) method, and the NiCo2O4 coated with an ALD-derived Al2O3 material was successfully used as an anode material for sodium-ion batteries (SIBs). This kind of electrode exhibited enhanced cycling performance with a reversible capacity of 395 mA h g−1 after 50 cycles, and good rate capability with the discharge capacities of 350, 320, and 294 mA h g−1 at the various current densities of 100, 200, and 400 mA g−1, respectively. Interestingly, remarkable prevention of the reactions between the electrode and electrolyte was observed. The performance improvement is due to the protection of the NiCo2O4 coated with an ALD-derived Al2O3 layer from the electrochemical active materials. These results demonstrate the great potential of NiCo2O4 coated with an ALD-derived Al2O3 material as anodes in SIBs.

Graphical abstract: An optimized Al2O3 layer for enhancing the anode performance of NiCo2O4 nanosheets for sodium-ion batteries

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Publication details

The article was received on 01 Mar 2017, accepted on 16 Jun 2017 and first published on 16 Jun 2017


Article type: Paper
DOI: 10.1039/C7TA01870C
Citation: J. Mater. Chem. A, 2017,5, 17881-17888
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    An optimized Al2O3 layer for enhancing the anode performance of NiCo2O4 nanosheets for sodium-ion batteries

    H. Kou, X. Li, H. Shan, L. Fan, B. Yan and D. Li, J. Mater. Chem. A, 2017, 5, 17881
    DOI: 10.1039/C7TA01870C

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