Cyclic ultracapacitor for fast-charging and scalable energy storage system

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

Energy, 2015, vol. 93, issue P1, 210-219

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.

Keywords: Supercapacitor; Slurry electrode; Porous carbon; Electrochemical flow capacitor (search for similar items in EconPapers)
Date: 2015
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:93:y:2015:i:p1:p:210-219

DOI: 10.1016/j.energy.2015.09.037

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