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Scalable integration of Li5FeO4 towards robust, high-performance lithium-ion hybrid capacitors

Journal Article


Abstract


  • Lithium-ion hybrid capacitors have attracted great interest due to their high specific energy relative to conventional electrical double-layer capacitors. Nevertheless, the safety issue still remains a drawback for lithium-ion capacitors in practical operational environments because of the use of metallic lithium. Herein, single-phase Li5FeO4 with an antifluorite structure that acts as an alternative lithium source (instead of metallic lithium) is employed and its potential use for lithium-ion capacitors is verified. Abundant Li+ amounts can be extracted from Li5FeO4 incorporated in the positive electrode and efficiently doped into the negative electrode during the first electrochemical charging. After the first Li+ extraction, Li+ does not return to the Li5FeO4 host structure and is steadily involved in the electrochemical reactions of the negative electrode during subsequent cycling. Various electrochemical and structural analyses support its superior characteristics for use as a promising lithium source. This versatile approach can yield a sufficient Li+-doping efficiency of >90 % and improved safety as a result of the removal of metallic lithium from the cell.

Authors


  •   Park, Min-Sik (external author)
  •   Lim, Younggeun (external author)
  •   Hwang, Soomin (external author)
  •   Kim, Jung Ho
  •   Kim, Jeomsoo (external author)
  •   Dou, Shi Xue
  •   Cho, Jaephil (external author)
  •   Kim, Young-Jun (external author)

Publication Date


  • 2014

Citation


  • Park, M., Lim, Y., Hwang, S., Kim, J., Kim, J., Dou, S. Xue., Cho, J. & Kim, Y. (2014). Scalable integration of Li5FeO4 towards robust, high-performance lithium-ion hybrid capacitors. ChemSusChem: chemistry and sustainability, energy and materials, 7 (11), 3138-3144.

Scopus Eid


  • 2-s2.0-84918506496

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1323

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 3138

End Page


  • 3144

Volume


  • 7

Issue


  • 11

Place Of Publication


  • Germany

Abstract


  • Lithium-ion hybrid capacitors have attracted great interest due to their high specific energy relative to conventional electrical double-layer capacitors. Nevertheless, the safety issue still remains a drawback for lithium-ion capacitors in practical operational environments because of the use of metallic lithium. Herein, single-phase Li5FeO4 with an antifluorite structure that acts as an alternative lithium source (instead of metallic lithium) is employed and its potential use for lithium-ion capacitors is verified. Abundant Li+ amounts can be extracted from Li5FeO4 incorporated in the positive electrode and efficiently doped into the negative electrode during the first electrochemical charging. After the first Li+ extraction, Li+ does not return to the Li5FeO4 host structure and is steadily involved in the electrochemical reactions of the negative electrode during subsequent cycling. Various electrochemical and structural analyses support its superior characteristics for use as a promising lithium source. This versatile approach can yield a sufficient Li+-doping efficiency of >90 % and improved safety as a result of the removal of metallic lithium from the cell.

Authors


  •   Park, Min-Sik (external author)
  •   Lim, Younggeun (external author)
  •   Hwang, Soomin (external author)
  •   Kim, Jung Ho
  •   Kim, Jeomsoo (external author)
  •   Dou, Shi Xue
  •   Cho, Jaephil (external author)
  •   Kim, Young-Jun (external author)

Publication Date


  • 2014

Citation


  • Park, M., Lim, Y., Hwang, S., Kim, J., Kim, J., Dou, S. Xue., Cho, J. & Kim, Y. (2014). Scalable integration of Li5FeO4 towards robust, high-performance lithium-ion hybrid capacitors. ChemSusChem: chemistry and sustainability, energy and materials, 7 (11), 3138-3144.

Scopus Eid


  • 2-s2.0-84918506496

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1323

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 3138

End Page


  • 3144

Volume


  • 7

Issue


  • 11

Place Of Publication


  • Germany