전기화학회지 (Journal of the Korean Electrochemical Society)

  • 제14권4호
  • /
  • Pages.201-207
  • /
  • 2011
  • /
  • 1229-1935(pISSN)
  • /
  • 2288-9000(eISSN)
한국전기화학회 (The Korean Electrochemical Society)
권호 표지
DOI QR코드

DOI QR Code

Supercapacitor용 이온성 액체 전해질의 전기화학적 특성

Electrochemical Characteristics of Supercapacitor Using Ionic Liquid Electrolyte

  • 김상길 (비츠로셀) ;
  • 황갑진 (호서대학교 일반대학원 그린에너지공학과) ;
  • 김재철 (호서대학교 일반대학원 그린에너지공학과) ;
  • 유철휘 (호서대학교 일반대학원 그린에너지공학과)
  • 투고 : 2011.11.03
  • 심사 : 2011.11.14
  • 발행 : 2011.11.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

수퍼커패시터는 다양한 응용범위를 갖는 유망한 에너지 저장장치로서 활발히 연구되고 있으며, 에너지 밀도 향상을 위하여 이온성 액체의 적용이 필요하다. 본 연구에서는 4급화 반응과 음이온 교환반응을 거쳐 4급 imidazolium 염을 생성하는 반응으로 두 종류의 EMI-$BF_4$를 합성하였다. $^1H$-NMR을 통하여 EMI-$BF_4$의 합성을 확인하였고 TGA를 통하여 열적안정성을 확인하였으며, 이때 합성된 이온성 액체를 열처리한 경우 열적 안정성이 향상되었다. LSV를 통하여 본 연구에서 합성한 EMI-$BF_4$가 4 V 이상의 넓은 전위창을 가지고 있어, 기존의 전해질 대비 우수한 전기화학적 안정성을 가지고 있음을 확인하였다. 충방전 실험 결과 본 실험에서 합성한 이온성 액체를 상용화 제품과 비교한 경우 용량은 각각 0.067 F 및 0.073 F로 측정되었다.

Supercapacitor has been studied actively as one of the most promising electrochemical energy storage system for a wide range of applications. To increase the energy density of supercapacitor, the introduction of ionic liquids is required. In this study, two types of EMI-$BF_4$ based on quaternary imidazolium salt were prepared with quaternary reaction and anion exchange. The structural characterization and thermal stability were analyzed by nuclear magnetic resonance($^1H$-NMR) and thermogravimetric analysis(TGA), respectively. Thermal stability of the EMI-$BF_4$ using TGA confirmed that, after heat treatment, the decomposition temperature of EMI-$BF_4$ was increased. Supercapacitors were fabricated with synthesized and commercial ionic liquids, and charge/discharge characteristics were also investigated. The capacity of supercapacitor, for synthesized and commercial EMI-$BF_4$ were determined to be 0.067 F and 0.073 F respectively, by means of charge/discharge test.

키워드

참고문헌

  1. B. E. Conway, "Transition from supercapacitor to battery behavior in electrochemical energy storage" J. Electrochem. Soc., 143, 3791 (1996). https://doi.org/10.1149/1.1837291
  2. P. Rodatz, G. Paganelli, A. Sciarretta, and L. Guzzella, "Optimal power management of an experimental fuel cell/supercapacitor-powered hybrid vehicle" Con. Eng. Prac., 13, 41 (2005). https://doi.org/10.1016/j.conengprac.2003.12.016
  3. E. Frackowiaka and F. Beguinb, "Electrochemical storage of energy in carbon nanotubes and nanostructured carbons" Carbon, 40, 1775 (2002). https://doi.org/10.1016/S0008-6223(02)00045-3
  4. K. M. Kim, J. W. Hur, S. I. Jung, and A. S. Kang, "Electrochemical characteristics of activated carbon/Ppy electrode combined with P(VdF-co-HFP)/PVP for EDLC" Electrochim. Acta, 50, 863 (2004). https://doi.org/10.1016/j.electacta.2004.02.059
  5. H. C. Kim, J. J. Yang, H. J. Kim, D. W. Shin, and S. K. Park, "Study for Addition Effect of Propylene Carbonate to 1-ethyl-3-methylimidazolium in Electric Double Layer Capacitors", J. Korean Electrochem. soc., 14, 38 (2011). https://doi.org/10.5229/JKES.2011.14.1.038
  6. G. Shin and S. G. Park, "Electrochemical properties of PPy/CNT electrodes prepared by chemical process for ultracapacitor" J. Electrochem. Soc. 10, 141 (2007). https://doi.org/10.5229/JKES.2007.10.2.141
  7. G. E. Blomgren and A. Webber, "Advances in lithium-ion batteries" Kluwar Academic/Plenium Publishers, New York, 185 (2002).
  8. V. Kamavaram and R. G. Reddy, "Thermal stabilities of di-alkylimidazolium chloride ionic liquids" International J. Thermal Sci., 47, 7773 (2008).
  9. K. H. Kim, "Preparation of non-aqueous supercapacitor by using lithium metal oxide/carbon composite electrode", Ph. D. Dissertation, Chungang Univ., Seoul, Korea (2006).
  10. P. Bonhote, A. P. Dias, N. Papageorgiou, K. Kalynasundaram, and M. Gratzel, "Hydrophobic, highly conductive ambienttemperature molten salts" Inorg. Chem., 35, 1168 (1996). https://doi.org/10.1021/ic951325x
  11. H. Sakaebe, H. Matsumoto, and K. Tatsumi, "Application of room temperature ionic liquids to Li batteries" Electrochim. Acta, 53, 1048 (2007). https://doi.org/10.1016/j.electacta.2007.02.054
  12. H. Matsumoto, H. Kageyama, and Y. Miyazaki, "Room temperature ionic liquids based on small aliphatic ammonium cations and asymmetric amide anions" Chem. Commun., 1726, 43 (2002).
  13. H. Matsumoto, H. Sakaebe, and K. Tatsumi, "Preparation of room temperature ionic liquids based on aliphatic onium cations and asymmetric amide anions and their electrochemical properties as a lithium battery electrolyte" J. Power Sources, 146, 45 (2005). https://doi.org/10.1016/j.jpowsour.2005.03.103
  14. Z.-B. Zhou, H. Matsumoto, and K. Tatsumi, "Structure and properties of new ionic liquids based on alkyl- and alkenyltrifluoroborates" ChemPhys Chem, 6, 1324 (2005). https://doi.org/10.1002/cphc.200500094
  15. H. Nakajima and H. Ohno, "Preparation of thermally stable polymer electrolytes from imidazolium-type ionic liquid derivatives" Polymer 46, 11499 (2005). https://doi.org/10.1016/j.polymer.2005.10.005
  16. B. S. Bang, "Preparation of non-aqueous supercapacitor by using ionic liquid", Master Dissertation, Chungang Univ., Seoul, Korea (2009).
  17. Y. Wang, K. Zaghib, A. Guerfi, F.C. Bazito, R. M. Torresi, and J. R. Dahn, "Accelerating rate calorimetry studies of the reactions between ionic liquids and charged lithium ion battery electrode materials" Electrochim. Acta, 52, 6346 (2007). https://doi.org/10.1016/j.electacta.2007.04.067

피인용 문헌

  1. Electrochemical Performance of Activated Carbon Electrode Materials with Various Post Treatments for EDLC vol.24, pp.6, 2014, https://doi.org/10.3740/MRSK.2014.24.6.285