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Issue 11, 2016
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An advanced high-energy sodium ion full battery based on nanostructured Na2Ti3O7/VOPO4 layered materials

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Abstract

In virtue of the abundant sodium resources, sodium ion batteries (SIBs) have been considered to be one of the promising alternatives to lithium ion batteries (LIBs). However, current research concentrates mostly on sodium ion half-cells, and the development of sodium ion full cells with high performance remains a critical challenge. Here we rationally designed a full sodium-ion battery based on nanostructured Na2Ti3O7 and VOPO4 materials as the anodes and cathodes, owing to their advantageous electrochemical features. The full cell outputs one of the highest operating voltages close to 2.9 V and delivers a large reversible capacity of 114 mA h g−1 at a rate of 0.1C. It also shows outstanding rate capability (∼74 mA h g−1 at 2C rate) and excellent cycling stability (92.4% capacity retention after 100 cycles). A high energy density of 220 W h kg−1 is achieved, which is comparable to the state-of-the-art LIBs. Moreover, the temperature-dependent charge–discharge tests indicate excellent capacity retentions in a wide temperature range of −20 to 55 °C.

Graphical abstract: An advanced high-energy sodium ion full battery based on nanostructured Na2Ti3O7/VOPO4 layered materials

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Publication details

The article was received on 16 Mar 2016, accepted on 20 Jun 2016 and first published on 20 Jun 2016


Article type: Communication
DOI: 10.1039/C6EE00794E
Citation: Energy Environ. Sci., 2016,9, 3399-3405
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    An advanced high-energy sodium ion full battery based on nanostructured Na2Ti3O7/VOPO4 layered materials

    H. Li, L. Peng, Y. Zhu, D. Chen, X. Zhang and G. Yu, Energy Environ. Sci., 2016, 9, 3399
    DOI: 10.1039/C6EE00794E

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