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Potassium ferrous ferricyanide nanoparticles as a high capacity and ultralong life cathode material for nonaqueous potassium-ion batteries

Journal Article


Abstract


  • We propose potassium ferrous ferricyanide (KFe II [Fe III (CN) 6 ]) nanoparticles with a 3D open framework structure as a cathode for nonaqueous K-ion batteries. Electrochemical reaction mechanism analyses identify that two redox-active sites based on C and N coordinated Fe II /Fe III redox couples play a role in K-ion storage, and no phase change occurs in the different states of the initial and second charge-discharge processes. Thus, the KFe II [Fe III (CN) 6 ] electrode exhibits a high discharge capacity of 118.7 mA h g -1 at an operating voltage of 3.34 V and extremely excellent cycling stability with a capacity value of 111.3 mA h g -1 after 100 cycles at 10 mA g -1 . Moreover, an ultralong cycling lifespan of 1000 cycles with a high capacity retention of 80.49% and extraordinary voltage stability at 100 mA g -1 can be acquired. Ex situ characterizations verify that the outstanding electrochemical performance of KFe II [Fe III (CN) 6 ] is attributed to superior structural stability and electrochemical reversibility upon long-term cycling. Therefore, the KFe II [Fe III (CN) 6 ] material can make KIBs competitive in EES applications.

Authors


  •   Chong, Shaokun (external author)
  •   Chen, Yuanzhen (external author)
  •   Zheng, Yang (external author)
  •   Tan, Qiang (external author)
  •   Shu, Chengyong (external author)
  •   Liu, Yongning (external author)
  •   Guo, Zaiping

Publication Date


  • 2017

Citation


  • Chong, S., Chen, Y., Zheng, Y., Tan, Q., Shu, C., Liu, Y. & Guo, Z. (2017). Potassium ferrous ferricyanide nanoparticles as a high capacity and ultralong life cathode material for nonaqueous potassium-ion batteries. Journal of Materials Chemistry A, 5 (43), 22465-22471.

Scopus Eid


  • 2-s2.0-85033409648

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2821

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 22465

End Page


  • 22471

Volume


  • 5

Issue


  • 43

Place Of Publication


  • United Kingdom

Abstract


  • We propose potassium ferrous ferricyanide (KFe II [Fe III (CN) 6 ]) nanoparticles with a 3D open framework structure as a cathode for nonaqueous K-ion batteries. Electrochemical reaction mechanism analyses identify that two redox-active sites based on C and N coordinated Fe II /Fe III redox couples play a role in K-ion storage, and no phase change occurs in the different states of the initial and second charge-discharge processes. Thus, the KFe II [Fe III (CN) 6 ] electrode exhibits a high discharge capacity of 118.7 mA h g -1 at an operating voltage of 3.34 V and extremely excellent cycling stability with a capacity value of 111.3 mA h g -1 after 100 cycles at 10 mA g -1 . Moreover, an ultralong cycling lifespan of 1000 cycles with a high capacity retention of 80.49% and extraordinary voltage stability at 100 mA g -1 can be acquired. Ex situ characterizations verify that the outstanding electrochemical performance of KFe II [Fe III (CN) 6 ] is attributed to superior structural stability and electrochemical reversibility upon long-term cycling. Therefore, the KFe II [Fe III (CN) 6 ] material can make KIBs competitive in EES applications.

Authors


  •   Chong, Shaokun (external author)
  •   Chen, Yuanzhen (external author)
  •   Zheng, Yang (external author)
  •   Tan, Qiang (external author)
  •   Shu, Chengyong (external author)
  •   Liu, Yongning (external author)
  •   Guo, Zaiping

Publication Date


  • 2017

Citation


  • Chong, S., Chen, Y., Zheng, Y., Tan, Q., Shu, C., Liu, Y. & Guo, Z. (2017). Potassium ferrous ferricyanide nanoparticles as a high capacity and ultralong life cathode material for nonaqueous potassium-ion batteries. Journal of Materials Chemistry A, 5 (43), 22465-22471.

Scopus Eid


  • 2-s2.0-85033409648

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2821

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 22465

End Page


  • 22471

Volume


  • 5

Issue


  • 43

Place Of Publication


  • United Kingdom