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The water catalysis at oxygen cathodes of lithium–oxygen cells

Author

Listed:
  • Fujun Li

    (Energy Interface Technology Group, National Institute of Advanced Industrial Science and Technology (AIST)
    The University of Tokyo)

  • Shichao Wu

    (Energy Interface Technology Group, National Institute of Advanced Industrial Science and Technology (AIST))

  • De Li

    (Energy Interface Technology Group, National Institute of Advanced Industrial Science and Technology (AIST))

  • Tao Zhang

    (Energy Interface Technology Group, National Institute of Advanced Industrial Science and Technology (AIST))

  • Ping He

    (National Laboratory of Solid State Microstructures & College of Engineering and Applied Sciences, Nanjing University)

  • Atsuo Yamada

    (The University of Tokyo)

  • Haoshen Zhou

    (Energy Interface Technology Group, National Institute of Advanced Industrial Science and Technology (AIST)
    The University of Tokyo
    National Laboratory of Solid State Microstructures & College of Engineering and Applied Sciences, Nanjing University)

Abstract

Lithium–oxygen cells have attracted extensive interests due to their high theoretical energy densities. The main challenges are the low round-trip efficiency and cycling instability over long time. However, even in the state-of-the-art lithium–oxygen cells the charge potentials are as high as 3.5 V that are higher by 0.70 V than the discharge potentials. Here we report a reaction mechanism at an oxygen cathode, ruthenium and manganese dioxide nanoparticles supported on carbon black Super P by applying a trace amount of water in electrolytes to catalyse the cathode reactions of lithium–oxygen cells during discharge and charge. This can significantly reduce the charge overpotential to 0.21 V, and results in a small discharge/charge potential gap of 0.32 V and superior cycling stability of 200 cycles. The overall reaction scheme will alleviate side reactions involving carbon and electrolytes, and shed light on the construction of practical, rechargeable lithium–oxygen cells.

Suggested Citation

  • Fujun Li & Shichao Wu & De Li & Tao Zhang & Ping He & Atsuo Yamada & Haoshen Zhou, 2015. "The water catalysis at oxygen cathodes of lithium–oxygen cells," Nature Communications, Nature, vol. 6(1), pages 1-7, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms8843
    DOI: 10.1038/ncomms8843
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    Cited by:

    1. Tan, P. & Jiang, H.R. & Zhu, X.B. & An, L. & Jung, C.Y. & Wu, M.C. & Shi, L. & Shyy, W. & Zhao, T.S., 2017. "Advances and challenges in lithium-air batteries," Applied Energy, Elsevier, vol. 204(C), pages 780-806.
    2. Tan, P. & Shyy, W. & Zhao, T.S. & Zhang, R.H. & Zhu, X.B., 2016. "Effects of moist air on the cycling performance of non-aqueous lithium-air batteries," Applied Energy, Elsevier, vol. 182(C), pages 569-575.

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