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Improved Li-storage performance with PEDOT-decorated MnO2 nanoboxes

Abstract

In this paper, MnO2 nanoboxes coated with poly(3,4-ethylenedioxythiophene) film (denoted as MnO2@PEDOT) are investigated as anode material in lithium-ion battery. The MnO2 nanoboxes are developed through the surface chemical oxidation decomposition of MnCO3 cubes and the subsequent removal of their remaining cores. PEDOT is coated on the surface of MnO2 nanoboxes via in-situ polymerization of 3,4-ethylenedioxythiophene. The charge-discharge tests demonstrate that this special configuration endows the resulting MnO2@PEDOT with remarkable electrochemical performances, that is, a reversible capacity of 628 mAh g-1 after 850 cycles at a current density of 1000 mA g-1 and a rate capacity of 367 mAh g-1 at 3000 mA g-1. The results indicate that the nanoboxes provide paths for Li-ion diffusion, the reaction sites for Li-ion intercalation/deintercalation and the space to buffer the volume change during the charge-discharge process, while the conductive polymer ensures the structural stability and improves the electronic conductive property of MnO2.

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Publication details

The article was received on 01 Aug 2017, accepted on 01 Nov 2017 and first published on 02 Nov 2017


Article type: Paper
DOI: 10.1039/C7NR05654K
Citation: Nanoscale, 2017, Accepted Manuscript
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    Improved Li-storage performance with PEDOT-decorated MnO2 nanoboxes

    Y. Qiu, X. Chen, Z. Cao, L. Xing, Y. Liao and W. Li, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR05654K

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