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Cyclic ultracapacitor for fast-charging and scalable energy storage system

Author

Listed:
  • Yeon, Sun-Hwa
  • Kim, Dong-Ha
  • Kim, Daewi
  • Park, Se-Kook
  • Yoon, Hana
  • Yoo, Jungjoon
  • Shin, Kyoung-Hee
  • Jin, Chang-Soo
  • Lee, Yun Jung
  • Lee, Sang-Young

Abstract

ESSs (Energy storage systems) for large-scale grid systems and next generation secondary battery systems require an ideal device that satisfies diverse properties such as a high energy density, high power density, low cost, and safe and reliable performance. In this study, we present a CUCap (cyclic ultracapacitor), which is comprised of two reservoirs and one flat flow capacitor cell with a cyclic continuous flow mode and independently tunable power rating and energy capacity. CUCap provides fast-charging and high capacity technology with a simple and practical design for high density and large-scale energy storage systems. The best performance appeared in slurry ratio (electrode to electrolyte) 1 to 7 with the total reservoir volume of 150 mL and the flow rate 300 ml/min, resulting in volumetric energy density, specific capacitance, and discharge time of 7.7 Wh L−1, 14.2 F ml−1, 100 min, respectively. Moreover, the slurry electrode of the CUCap cell had a maximum current density around 260 mA cm−2 which could possibly result in a fast-charging CUCap system.

Suggested Citation

  • Yeon, Sun-Hwa & Kim, Dong-Ha & Kim, Daewi & Park, Se-Kook & Yoon, Hana & Yoo, Jungjoon & Shin, Kyoung-Hee & Jin, Chang-Soo & Lee, Yun Jung & Lee, Sang-Young, 2015. "Cyclic ultracapacitor for fast-charging and scalable energy storage system," Energy, Elsevier, vol. 93(P1), pages 210-219.
    • Handle: RePEc:eee:energy:v:93:y:2015:i:p1:p:210-219
    DOI: 10.1016/j.energy.2015.09.037
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