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Interpreting Abnormal Charge−Discharge Plateau Migration in CuxS during Long-Term Cycling

Journal Article


Abstract


  • Voltage polarization during cycling, the charge potential increase of anode or discharge plateau decrease of cathode, is widely observed and would lower the output voltage. Conversely, an anomalous potential plateau negative migration phenomenon was observed in CuxS anode of sodium-ion battery. In this study, the background mechanism was clarified from the switch of intercalation-conversion reactions and structure evolution. The dynamic cooperation between intercalation and conversion reactions may root the potential plateau negative migration during cycling. In the initial stage, the intercalation-type reaction with Na3Cu4S4 and Na4Cu2S3 products at 2.13 and 1.92 V would dominate the early migration process of potential plateaus. In the second stage, the conversion-type reaction dominated by Na2S and metallic copper formed at 1.85 and 1.53 V in the later period. The aforementioned results would provide new perspective on the electrochemical behavior of transition-metal sulfide anode and provide a clue for reducing voltage polarization.

Authors


  •   Yang, Zu Guang (external author)
  •   Chen, Ting (external author)
  •   Wu, Chunjin (external author)
  •   Qu, Jie (external author)
  •   Wu, Zhenguo (external author)
  •   Guo, Xiaodong (external author)
  •   Zhong, Ben-He (external author)
  •   Liu, Hua K.
  •   Dou, Shi Xue

Publication Date


  • 2019

Citation


  • Yang, Z., Chen, T., Wu, C., Qu, J., Wu, Z., Guo, X., Zhong, B., Liu, H. & Dou, S. (2019). Interpreting Abnormal Charge−Discharge Plateau Migration in CuxS during Long-Term Cycling. ACS Applied Materials and Interfaces, 11 (4), 3961-3970.

Scopus Eid


  • 2-s2.0-85060803601

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3480

Has Global Citation Frequency


Number Of Pages


  • 9

Start Page


  • 3961

End Page


  • 3970

Volume


  • 11

Issue


  • 4

Place Of Publication


  • United States

Abstract


  • Voltage polarization during cycling, the charge potential increase of anode or discharge plateau decrease of cathode, is widely observed and would lower the output voltage. Conversely, an anomalous potential plateau negative migration phenomenon was observed in CuxS anode of sodium-ion battery. In this study, the background mechanism was clarified from the switch of intercalation-conversion reactions and structure evolution. The dynamic cooperation between intercalation and conversion reactions may root the potential plateau negative migration during cycling. In the initial stage, the intercalation-type reaction with Na3Cu4S4 and Na4Cu2S3 products at 2.13 and 1.92 V would dominate the early migration process of potential plateaus. In the second stage, the conversion-type reaction dominated by Na2S and metallic copper formed at 1.85 and 1.53 V in the later period. The aforementioned results would provide new perspective on the electrochemical behavior of transition-metal sulfide anode and provide a clue for reducing voltage polarization.

Authors


  •   Yang, Zu Guang (external author)
  •   Chen, Ting (external author)
  •   Wu, Chunjin (external author)
  •   Qu, Jie (external author)
  •   Wu, Zhenguo (external author)
  •   Guo, Xiaodong (external author)
  •   Zhong, Ben-He (external author)
  •   Liu, Hua K.
  •   Dou, Shi Xue

Publication Date


  • 2019

Citation


  • Yang, Z., Chen, T., Wu, C., Qu, J., Wu, Z., Guo, X., Zhong, B., Liu, H. & Dou, S. (2019). Interpreting Abnormal Charge−Discharge Plateau Migration in CuxS during Long-Term Cycling. ACS Applied Materials and Interfaces, 11 (4), 3961-3970.

Scopus Eid


  • 2-s2.0-85060803601

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3480

Has Global Citation Frequency


Number Of Pages


  • 9

Start Page


  • 3961

End Page


  • 3970

Volume


  • 11

Issue


  • 4

Place Of Publication


  • United States