Skip to main content
placeholder image

Unraveling the effect of salt chemistry on long-durability high-phosphorus-concentration anode for potassium ion batteries

Journal Article


Download full-text (Open Access)

Abstract


  • Phosphorus-based anode materials are of considerable interest for grid-scale energy storage systems due to their high theoretical capacity. Nevertheless, the low electrical conductivity of P, large volume changes during cycling, and highly-reactive phosphide surface are hindering their potential applications. Herein, outstanding long-term cycling stability with high retained potassium storage capacity (213.7 mA h g−1over 2000 cycles) was achieved via the introduction of an alternative potassium bis(fluorosulfonyl)imide (KFSI) salt and by using a layered compound (GeP5) with a high phosphorus concentration as anode material. Fourier transform infrared spectroscopic mapping results suggest that KFSI salt helps to form an uniform solid electrolyte interphase (SEI) layer and reduces the side reactions at the electrode/electrolyte interface, thus enhancing the cycling performance. In-operando synchrotron X-ray diffraction analysis has revealed the synergistic reaction mechanisms of the K-P and K-Ge reactions. These findings indicate the enormous potential of phosphorus-based anodes for high-performance potassium ion batteries and can attract broad interest for regulating the SEI layer formation through manipulating the salt chemistry.

Authors


  •   Zhang, Wenchao (external author)
  •   Wu, Zhibin (external author)
  •   Zhang, Jian
  •   Liu, Guoping (external author)
  •   Yang, Nai-Hsuan (external author)
  •   Liu, Ru-Shi (external author)
  •   Pang, Wei Kong.
  •   Li, Wenwu (external author)
  •   Guo, Zaiping

Publication Date


  • 2018

Citation


  • Zhang, W., Wu, Z., Zhang, J., Liu, G., Yang, N., Liu, R., Pang, W., Li, W. & Guo, Z. (2018). Unraveling the effect of salt chemistry on long-durability high-phosphorus-concentration anode for potassium ion batteries. Nano Energy, 53 967-974.

Scopus Eid


  • 2-s2.0-85054184503

Ro Full-text Url


  • https://ro.uow.edu.au/context/aiimpapers/article/4333/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3280

Number Of Pages


  • 7

Start Page


  • 967

End Page


  • 974

Volume


  • 53

Place Of Publication


  • Netherlands

Abstract


  • Phosphorus-based anode materials are of considerable interest for grid-scale energy storage systems due to their high theoretical capacity. Nevertheless, the low electrical conductivity of P, large volume changes during cycling, and highly-reactive phosphide surface are hindering their potential applications. Herein, outstanding long-term cycling stability with high retained potassium storage capacity (213.7 mA h g−1over 2000 cycles) was achieved via the introduction of an alternative potassium bis(fluorosulfonyl)imide (KFSI) salt and by using a layered compound (GeP5) with a high phosphorus concentration as anode material. Fourier transform infrared spectroscopic mapping results suggest that KFSI salt helps to form an uniform solid electrolyte interphase (SEI) layer and reduces the side reactions at the electrode/electrolyte interface, thus enhancing the cycling performance. In-operando synchrotron X-ray diffraction analysis has revealed the synergistic reaction mechanisms of the K-P and K-Ge reactions. These findings indicate the enormous potential of phosphorus-based anodes for high-performance potassium ion batteries and can attract broad interest for regulating the SEI layer formation through manipulating the salt chemistry.

Authors


  •   Zhang, Wenchao (external author)
  •   Wu, Zhibin (external author)
  •   Zhang, Jian
  •   Liu, Guoping (external author)
  •   Yang, Nai-Hsuan (external author)
  •   Liu, Ru-Shi (external author)
  •   Pang, Wei Kong.
  •   Li, Wenwu (external author)
  •   Guo, Zaiping

Publication Date


  • 2018

Citation


  • Zhang, W., Wu, Z., Zhang, J., Liu, G., Yang, N., Liu, R., Pang, W., Li, W. & Guo, Z. (2018). Unraveling the effect of salt chemistry on long-durability high-phosphorus-concentration anode for potassium ion batteries. Nano Energy, 53 967-974.

Scopus Eid


  • 2-s2.0-85054184503

Ro Full-text Url


  • https://ro.uow.edu.au/context/aiimpapers/article/4333/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3280

Number Of Pages


  • 7

Start Page


  • 967

End Page


  • 974

Volume


  • 53

Place Of Publication


  • Netherlands