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Issue 15, 2018
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Multiple heterointerfaces boosted de-/sodiation kinetics towards superior Na storage and Na-Ion full battery

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Abstract

In this article, an effective strategy (viz., constructing multiple heterointerfaces) is proposed to develop superior electrode materials for sodium-ion battery (SIB), which is the most promising alternative to market-dominant lithium-ion battery for stationary energy storage. In the as-prepared heterogeneous-SnO2/Se/graphene (h-SSG) composite, there exists multiple phase interfaces, including heterointerfaces between tetragonal and orthorhombic SnO2 (t-/o-SnO2) in the heterogeneous SnO2 nanojunctions and two phase interfaces between t/o-SnO2 and amorphous Se. These multiple phase interfaces promise the much improved Na storage properties of h-SSG when compared to four controls without such multiple heterointerfaces because the multiple built-in electric fields at the heterointerfaces can significantly boost the surface reaction kinetics and facilitate charge transport as demonstrated by kinetics analyses, theoretical calculations and contrastive electrochemical tests. Moreover, h-SSG also exhibits superior Na-ion full cell performance when coupled with a high-voltage Na3V2(PO4)2O2F cathode. In view of the universality of the heterointerface-based enhancement effect on surface reaction and charge transport kinetics and the facile preparation procedures, the present strategy should be universal to develop other superior electrode materials for high-performance SIBs and other batteries for future energy storage applications.

Graphical abstract: Multiple heterointerfaces boosted de-/sodiation kinetics towards superior Na storage and Na-Ion full battery

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Publication details

The article was received on 03 Feb 2018, accepted on 13 Mar 2018 and first published on 13 Mar 2018


Article type: Paper
DOI: 10.1039/C8TA01132J
Citation: J. Mater. Chem. A, 2018,6, 6578-6586
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    Multiple heterointerfaces boosted de-/sodiation kinetics towards superior Na storage and Na-Ion full battery

    Y. Wang, B. Hou, Y. Wang, H. Lü, J. Guo, Q. Ning, J. Zhang, C. Lü and X. Wu, J. Mater. Chem. A, 2018, 6, 6578
    DOI: 10.1039/C8TA01132J

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