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Optimized Al2O3 layer enhancing anode performance of NiCo2O4 nanosheets for sodium ion batteries

Abstract

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

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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, Accepted Manuscript
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    Optimized Al2O3 layer enhancing 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, Accepted Manuscript , DOI: 10.1039/C7TA01870C

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