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Through in situ redox deposition and growth of MnO2 nanostructures on hierarchically porous carbon (HPC), a MnO2/HPC hybrid has been synthesized and employed as cathode catalyst for non-aqueous Li-O2 batteries. Owing to the mild synthetic conditions, MnO2 was uniformly distributed on the surface of the carbon support, without destroying the hierarchical porous nanostructure. As a result, the as-prepared MnO2/HPC nanocomposite exhibits excellent Li-O2 battery performance, including low charge overpotential, good rate capacity and long cycle stability up to 300 cycles with controlling capacity of 1, 000 mAh·g-1. A combination of the multi-scale porous network of the shell-connected carbon support and the highly dispersed MnO2 nanostructure benefits the transportation of ions, oxygen and electrons and contributes to the excellent electrode performance.

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Publication history

Received: 31 August 2014
Revised: 02 October 2014
Accepted: 06 October 2014
Published: 05 November 2014
Issue date: January 2015

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© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2014

Acknowledgements

Acknowledgements

This work was supported by the National Basic Research Program of China (No. 2011CB935900), National Natural Science Foundation of China (Nos. 21322101 and 21231005), and MOE (Nos. ACET-13-0296 and B12015).

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Reprints and Permission requests may be sought directly from editorial office.
Email: nanores@tup.tsinghua.edu.cn

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