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Evidence of covalent synergy in silicon–sulfur–graphene yielding highly efficient and long-life lithium-ion batteries

Author

Listed:
  • Fathy M. Hassan

    (University of Waterloo)

  • Rasim Batmaz

    (University of Waterloo)

  • Jingde Li

    (University of Waterloo)

  • Xiaolei Wang

    (University of Waterloo)

  • Xingcheng Xiao

    (Chemical and Materials Systems, General Motors Global Research and Development Center)

  • Aiping Yu

    (University of Waterloo)

  • Zhongwei Chen

    (University of Waterloo)

Abstract

Silicon has the potential to revolutionize the energy storage capacities of lithium-ion batteries to meet the ever increasing power demands of next generation technologies. To avoid the operational stability problems of silicon-based anodes, we propose synergistic physicochemical alteration of electrode structures during their design. This capitalizes on covalent interaction of Si nanoparticles with sulfur-doped graphene and with cyclized polyacrylonitrile to provide a robust nanoarchitecture. This hierarchical structure stabilized the solid electrolyte interphase leading to superior reversible capacity of over 1,000 mAh g−1 for 2,275 cycles at 2 A g−1. Furthermore, the nanoarchitectured design lowered the contact of the electrolyte to the electrode leading to not only high coulombic efficiency of 99.9% but also maintaining high stability even with high electrode loading associated with 3.4 mAh cm−2. The excellent performance combined with the simplistic, scalable and non-hazardous approach render the process as a very promising candidate for Li-ion battery technology.

Suggested Citation

  • Fathy M. Hassan & Rasim Batmaz & Jingde Li & Xiaolei Wang & Xingcheng Xiao & Aiping Yu & Zhongwei Chen, 2015. "Evidence of covalent synergy in silicon–sulfur–graphene yielding highly efficient and long-life lithium-ion batteries," Nature Communications, Nature, vol. 6(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms9597
    DOI: 10.1038/ncomms9597
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    Cited by:

    1. Bohua Ren & Guobin Wen & Rui Gao & Dan Luo & Zhen Zhang & Weibin Qiu & Qianyi Ma & Xin Wang & Yi Cui & Luis Ricardez–Sandoval & Aiping Yu & Zhongwei Chen, 2022. "Nano-crumples induced Sn-Bi bimetallic interface pattern with moderate electron bank for highly efficient CO2 electroreduction," Nature Communications, Nature, vol. 13(1), pages 1-11, December.

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