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, Sang Young Lee

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)210-219
Number of pages10
JournalEnergy
Volume93
DOIs
Publication statusPublished - 2015 Dec 15

Bibliographical note

Funding Information:
This work was conducted under the framework of Research and Development Program of the Korea Institute of Energy Research (KIER) (B5-2414)

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Pollution
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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