**6. Conclusion**

For this chapter, we performed a voltage hold test, which is an accelerated deterioration test, on a commercial cylindrical electric double-layer capacitor (EDLC) by applying overvoltage. We confirmed behaviors of deterioration induced by the application of overvoltage. Furthermore, we disassembled the EDLCs after testing and conducted chemical analyses on the polarizable electrodes and the electrolyte, which are the main components of the EDLCs. This resulted in the three findings:


#### **Acknowledgements**

The author thanks Mr. Mikio Taguchi and Dr. Hiromu Yoshitama, the graduate students from the Department of Electrical and Electronic Engineering at the Graduate School of Engineering of the University of Miyazaki, for their help with conducting this study.

**69**

**Author details**

Daisuke Tashima

provided the original work is properly cited.

Fukuoka Institute of Technology, Fukuoka, Japan

\*Address all correspondence to: tashima@fit.ac.jp

© 2018 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium,

*Deterioration Factors of Electric Double-Layer Capacitors Obtained from Voltage Hold Test*

*DOI: http://dx.doi.org/10.5772/intechopen.79260*

*Deterioration Factors of Electric Double-Layer Capacitors Obtained from Voltage Hold Test DOI: http://dx.doi.org/10.5772/intechopen.79260*
