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Coaxial α-MnSe@N-Doped Carbon Double Nanotubes as Superior Anode Materials in Li/Na-Ion Half/Full Batteries

Abstract

Coaxial nanotubes are a significant class of nanoscale building blocks for advanced electrodes of secondary batteries. Herein, one-dimensional (1D) coaxial double nanotubes (DNTs) consisted of α-MnSe inner tubes and N-doped carbon (N-C) outer tubes (abbreviated as α-MnSe@N-C DNTs) are successfully prepared and demonstrated to be promising anode material for Li-ion and Na-ion batteries (LIBs/NIBs). When used for LIBs, it is revealed by the studies of ex situ XRD/HRTEM and electrode kinetics that a new electrochemical α→β phase transition plays a crucial role on improving the cycling stability. As a result, the α-MnSe@N-C DNTs electrode delivers a high Li-storage capacity (800 mA h g-1 at 50 mA g-1), excellent rate capability (405 mA h g-1 at 14 A g-1) and ultralong cycling stabiligy (a high capacity retention of 87.2% even after 9000 cycles at 2 A g-1) with retained 1D morphology. In addition, the outer N-C nanotube can effectively protect the active α-MnSe inner nanotube to realize such outstanding electrochemical properties owing to its high electrical conductivity and particular 1D coaxial nanoarchitecture. Moreover, α-MnSe@N-C DNTs also exhibit excellent Li/Na-storage properties and full-cell performances as coupling with commercial LiFePO4 and LiNi0.6Co0.2Mn0.2O2 cathodes in LIBs as well as Na3V2(PO4)2O2F cathode in NIBs.

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Publication details

The article was received on 30 Apr 2018, accepted on 09 Jul 2018 and first published on 09 Jul 2018


Article type: Paper
DOI: 10.1039/C8TA03967D
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Coaxial α-MnSe@N-Doped Carbon Double Nanotubes as Superior Anode Materials in Li/Na-Ion Half/Full Batteries

    D. Liu, W. Li, H. Liang, H. Lü, J. Wang, J. Guo and X. Wu, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA03967D

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