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Issue 29, 2016
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A CNT cocoon on sodium manganate nanotubes forming a core/branch cathode coupled with a helical carbon nanofibre anode for enhanced sodium ion batteries

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Abstract

The commercial advancement of high-performance sodium ion batteries is highly dependent on the judicious design/construction of advanced electrode materials. In this work, we construct novel P2-type Na0.7MnO2.05 nanotube/carbon nanotube (NMO/CNT) core/branch composites via a powerful three-step process for sodium ion battery (SIB) applications. P2-type Na0.7MnO2.05 nanotubes of about 500 nm have been, for the first time to our knowledge, fabricated and further modified by cocoon-like CNT branches. The cycling performance is increased significantly with an encouraging capacity retention of 88% at 0.1 A gāˆ’1 after 100 cycles due to enhanced electrochemical kinetics and improved structural stabilization resulting from the CNT cocoon branches. To assess the practical functionality as a full cell, a helical carbon nanofibre (HCNF) anode with capacitive-dominated sodium ion storage is also developed to match with the NMO/CNT cathode. The new-type NMO/CNT//HCNF full cells exhibit encouraging cycle performance with a capacity retention of 71% after 200 cycles at 100 mA gāˆ’1 and superior rate performance to the unmodified NMO//HCNF full cells. Our electrode design strategy provides a new way for fabricating high-performance electrode materials for SIBs.

Graphical abstract: A CNT cocoon on sodium manganate nanotubes forming a core/branch cathode coupled with a helical carbon nanofibre anode for enhanced sodium ion batteries

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Publication details

The article was received on 17 Jun 2016, accepted on 26 Jun 2016 and first published on 28 Jun 2016


Article type: Communication
DOI: 10.1039/C6TA05069G
Citation: J. Mater. Chem. A, 2016,4, 11207-11213
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    A CNT cocoon on sodium manganate nanotubes forming a core/branch cathode coupled with a helical carbon nanofibre anode for enhanced sodium ion batteries

    Y. Zhong, X. Xia, J. Zhan, X. Wang and J. Tu, J. Mater. Chem. A, 2016, 4, 11207
    DOI: 10.1039/C6TA05069G

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