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Fast-pulverization enabled simultaneous enhancement on cycling stability and rate capability of C@NiFe2O4 hierarchical fibrous bundle

Journal Article


Abstract


  • Electrochemical-grinding induced pulverization is the origin of capacity fading in NiFe 2 O 4 . Increasing current density normally accelerates the pulverization that deteriorates lithium storage properties of NiFe 2 O 4 . Here we show that the high current induced fast-pulverization can serve as an efficient activation strategy for quick and simultaneous enhancement on cycling stability and rate capability of NiFe 2 O 4 nanoparticles (NPs) that are densely packed on the hierarchically structured carbon nanofiber strand. At a high current density, the pulverization of NiFe 2 O 4 NPs can be accomplished in a few cycles exposing more active surface. During the fast-pulverization, the hierarchically structured carbon nanofiber strand maintains conductive contact for the de nsely packed NiFe 2 O 4 NPs regardless of charge or discharge, which also effectively suppresses the repetitive breaks and growths of solid-electrolyte-interphase (SEI) via multiple-level structural adaption that favourites the quick formation of a thin and dense SEI, thus providing strong interparticle connectivity with enhancement on cycling stability and rate capability (e.g. doubled capacity). Our findings demonstrate the potential importance of high current induced fast-pulverization as an efficient activation strategy for achieving durable electrode materials suffering from electrochemical-grinding effects.

Authors


  •   Chen, Zerui (external author)
  •   Zhang, Yu (external author)
  •   Wang, Xiaoling (external author)
  •   Sun, Wenping
  •   Dou, Shi Xue
  •   Huang, Xin (external author)
  •   Shi, Bi (external author)

Publication Date


  • 2017

Citation


  • Chen, Z., Zhang, Y., Wang, X., Sun, W., Dou, S., Huang, X. & Shi, B. (2017). Fast-pulverization enabled simultaneous enhancement on cycling stability and rate capability of C@NiFe2O4 hierarchical fibrous bundle. Journal of Power Sources, 363 209-217.

Scopus Eid


  • 2-s2.0-85026362474

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2645

Has Global Citation Frequency


Number Of Pages


  • 8

Start Page


  • 209

End Page


  • 217

Volume


  • 363

Place Of Publication


  • Netherlands

Abstract


  • Electrochemical-grinding induced pulverization is the origin of capacity fading in NiFe 2 O 4 . Increasing current density normally accelerates the pulverization that deteriorates lithium storage properties of NiFe 2 O 4 . Here we show that the high current induced fast-pulverization can serve as an efficient activation strategy for quick and simultaneous enhancement on cycling stability and rate capability of NiFe 2 O 4 nanoparticles (NPs) that are densely packed on the hierarchically structured carbon nanofiber strand. At a high current density, the pulverization of NiFe 2 O 4 NPs can be accomplished in a few cycles exposing more active surface. During the fast-pulverization, the hierarchically structured carbon nanofiber strand maintains conductive contact for the de nsely packed NiFe 2 O 4 NPs regardless of charge or discharge, which also effectively suppresses the repetitive breaks and growths of solid-electrolyte-interphase (SEI) via multiple-level structural adaption that favourites the quick formation of a thin and dense SEI, thus providing strong interparticle connectivity with enhancement on cycling stability and rate capability (e.g. doubled capacity). Our findings demonstrate the potential importance of high current induced fast-pulverization as an efficient activation strategy for achieving durable electrode materials suffering from electrochemical-grinding effects.

Authors


  •   Chen, Zerui (external author)
  •   Zhang, Yu (external author)
  •   Wang, Xiaoling (external author)
  •   Sun, Wenping
  •   Dou, Shi Xue
  •   Huang, Xin (external author)
  •   Shi, Bi (external author)

Publication Date


  • 2017

Citation


  • Chen, Z., Zhang, Y., Wang, X., Sun, W., Dou, S., Huang, X. & Shi, B. (2017). Fast-pulverization enabled simultaneous enhancement on cycling stability and rate capability of C@NiFe2O4 hierarchical fibrous bundle. Journal of Power Sources, 363 209-217.

Scopus Eid


  • 2-s2.0-85026362474

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2645

Has Global Citation Frequency


Number Of Pages


  • 8

Start Page


  • 209

End Page


  • 217

Volume


  • 363

Place Of Publication


  • Netherlands