LiFePO4 - Activated carbon composite electrode as symmetrical electrochemical capacitor in mild aqueous electrolyte

M. Y. Ho, P. S. Khiew, D. Isa, T. K. Tan, W. S. Chiu, Chin Hua Chia

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

In this study, a symmetric electrochemical capacitor has been fabricated by adopting the lithiated compound (LiFePO4)-activated carbon (AC) composite as the core electrode materials. The electrochemical performances of the prepared supercapacitor were studied using cyclic voltammetry (CV) in 1.0 M Na2SO3 solution. Experimental results reveal that the maximum specific capacitance of 112.41 F/g is obtained in 40 wt % LiFePO4 loading on AC electrode in comparison to that of pure AC electrode (76.24 F/g) in 1 M Na2SO3. The enhanced capacitive performance of the 40 wt % LiFeO4 –AC composite electrode is believed attributed to the contribution of synergistic effect of electric double layer capacitance (EDLC) on the surface of AC as well as pseudocapacitance via intercalation/extraction of Na+, SO32- and Li+ ions in LiFePO4 lattices. The composite electrodes can sustain a stable capacitive performance at least 1000 cycles with only ~5 % specific capacitance loss after 1000 cycles. Based on the findings above, 40 wt % LiFeO4 –AC composite electrodes which utilise low cost materials and environmental friendly electrolyte is worth being investigated in more details.

Original languageEnglish
Title of host publicationApplied Mechanics and Materials
PublisherTrans Tech Publications Ltd
Pages3-6
Number of pages4
Volume627
ISBN (Print)9783038352297
DOIs
Publication statusPublished - 2014
Event3rd International Conference on Advances in Mechanics Engineering, ICAME 2014 - Hong Kong
Duration: 28 Jul 201429 Jul 2014

Publication series

NameApplied Mechanics and Materials
Volume627
ISSN (Print)16609336
ISSN (Electronic)16627482

Other

Other3rd International Conference on Advances in Mechanics Engineering, ICAME 2014
CityHong Kong
Period28/7/1429/7/14

Fingerprint

Activated carbon
Capacitors
Electrolytes
Electrodes
Composite materials
Capacitance
Intercalation
Cyclic voltammetry
Ions
Costs

Keywords

  • Activated carbon
  • Aqueous electrolyte
  • Electrochemical capacitor
  • Lithium iron phosphate
  • Sodium sulfite

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Ho, M. Y., Khiew, P. S., Isa, D., Tan, T. K., Chiu, W. S., & Chia, C. H. (2014). LiFePO4 - Activated carbon composite electrode as symmetrical electrochemical capacitor in mild aqueous electrolyte. In Applied Mechanics and Materials (Vol. 627, pp. 3-6). (Applied Mechanics and Materials; Vol. 627). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/AMM.627.3

LiFePO4 - Activated carbon composite electrode as symmetrical electrochemical capacitor in mild aqueous electrolyte. / Ho, M. Y.; Khiew, P. S.; Isa, D.; Tan, T. K.; Chiu, W. S.; Chia, Chin Hua.

Applied Mechanics and Materials. Vol. 627 Trans Tech Publications Ltd, 2014. p. 3-6 (Applied Mechanics and Materials; Vol. 627).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ho, MY, Khiew, PS, Isa, D, Tan, TK, Chiu, WS & Chia, CH 2014, LiFePO4 - Activated carbon composite electrode as symmetrical electrochemical capacitor in mild aqueous electrolyte. in Applied Mechanics and Materials. vol. 627, Applied Mechanics and Materials, vol. 627, Trans Tech Publications Ltd, pp. 3-6, 3rd International Conference on Advances in Mechanics Engineering, ICAME 2014, Hong Kong, 28/7/14. https://doi.org/10.4028/www.scientific.net/AMM.627.3
Ho MY, Khiew PS, Isa D, Tan TK, Chiu WS, Chia CH. LiFePO4 - Activated carbon composite electrode as symmetrical electrochemical capacitor in mild aqueous electrolyte. In Applied Mechanics and Materials. Vol. 627. Trans Tech Publications Ltd. 2014. p. 3-6. (Applied Mechanics and Materials). https://doi.org/10.4028/www.scientific.net/AMM.627.3
Ho, M. Y. ; Khiew, P. S. ; Isa, D. ; Tan, T. K. ; Chiu, W. S. ; Chia, Chin Hua. / LiFePO4 - Activated carbon composite electrode as symmetrical electrochemical capacitor in mild aqueous electrolyte. Applied Mechanics and Materials. Vol. 627 Trans Tech Publications Ltd, 2014. pp. 3-6 (Applied Mechanics and Materials).
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abstract = "In this study, a symmetric electrochemical capacitor has been fabricated by adopting the lithiated compound (LiFePO4)-activated carbon (AC) composite as the core electrode materials. The electrochemical performances of the prepared supercapacitor were studied using cyclic voltammetry (CV) in 1.0 M Na2SO3 solution. Experimental results reveal that the maximum specific capacitance of 112.41 F/g is obtained in 40 wt {\%} LiFePO4 loading on AC electrode in comparison to that of pure AC electrode (76.24 F/g) in 1 M Na2SO3. The enhanced capacitive performance of the 40 wt {\%} LiFeO4 –AC composite electrode is believed attributed to the contribution of synergistic effect of electric double layer capacitance (EDLC) on the surface of AC as well as pseudocapacitance via intercalation/extraction of Na+, SO32- and Li+ ions in LiFePO4 lattices. The composite electrodes can sustain a stable capacitive performance at least 1000 cycles with only ~5 {\%} specific capacitance loss after 1000 cycles. Based on the findings above, 40 wt {\%} LiFeO4 –AC composite electrodes which utilise low cost materials and environmental friendly electrolyte is worth being investigated in more details.",
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