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A New Strategy to Effectively Alleviate Volume Expansion and Enhance Conductivity of Hierarchical MnO@C Nanocomposites for Lithium Ion Batteries

Abstract

Here, a simple and an environmentally friendly approach is developed to fabricate the novel MnO@C hierarchical structure derived from Mn-based metal organic frameworks, which is explored as an anode material of lithium ion batteries. Remarkably, the MnO@C microsphere electrode deliveries an outstanding long cycling capacity of 596.3 mAh g-1 at 5 C (1 C = 765 mA g-1) after 1000 cycles and excellent rate performance of 380.1 mAh g-1 at 10 C. The overall outstanding properties of the hierarchical MnO@C composite should be attributed to the success of a new strategy of dual structure design, which provides two pathways for effectively alleviating volume changes and enhancing conductivity based on in situ TEM electrochemical experiments and electrochemical impedance spectra. Both the poor conductivity and great volume changes of MnO electrode material could be effectively improved in two ways of the porous carbon matrix confined MnO nanoparticles and hierarchically nanorods assembled architecture. The structures herein point to new design concepts of metal oxide nanoarchitectures for high performance electrode materials in lithium ion batteries.

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Publication details

The article was received on 10 Jul 2017, accepted on 13 Sep 2017 and first published on 15 Sep 2017


Article type: Paper
DOI: 10.1039/C7TA05986H
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    A New Strategy to Effectively Alleviate Volume Expansion and Enhance Conductivity of Hierarchical MnO@C Nanocomposites for Lithium Ion Batteries

    Z. Cui, Q. Liu, C. Xu, R. Zou, J. Zhang, W. Zhang, G. Guan, J. Hu and Y. Sun, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA05986H

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