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ISSN : 1225-0562(Print)
ISSN : 2287-7258(Online)
Korean Journal of Materials Research Vol.29 No.12 pp.774-780
DOI : https://doi.org/10.3740/MRSK.2019.29.12.774

Electrochemical Behavior Depending on Designed-Anode and Cathodes of Hybrid Supercapacitors

Seung-Il Shin1,Byung-Gwan Lee2,Min-Woo Ha1†,Geon-Hyoung An3,4†
1 Department of Electrical Engineering, Myongji University, Yongin-si, Gyeonggi-do 17058, Republic of Korea
2 R&D Center, EUROCELL, Gajangsaneopseo-ro, Osan-si, Gyeonggi-do 18103, Republic of Korea
3 Department of Energy Engineering, Gyeongnam National University of Science and Technology, Jinju 52849, Republic of Korea
4 Future Convergence Technology Research Institute, Gyeongnam National University of Science and Technology, Jinju 52849, Republic of Korea
Corresponding author E-Mail : isobar@mju.ac.kr (M.-W. Ha, Myongji Univ.) E-Mail : ghan@gntech.ac.kr (G.-H. An, Gyeongnam Nat'l Univ. Sci. and Tech.)

Abstract

The performance of Li-ion hybrid supercapacitors (asymmetric-type) depends on many factors such as the capacity ratio, material properties, cell designs and operating conditions. Among these, in consideration of balanced electrochemical reactions, the capacity ratio of the negative (anode) to positive (cathode) electrode is one of the most important factors to design the Li-ion hybrid supercapacitors for high energy storing performance. We assemble Li-ion hybrid supercapacitors using activated carbon (AC) as anode material, lithium manganese oxide as cathode material, and organic electrolyte (1 mol L−1 LiPF6 in acetonitrile). At this point, the thickness of the anode electrode is controlled at 160, 200, and 240 μm. Also, thickness of cathode electrode is fixed at 60 μm. Then, the effect of negative and positive electrode ratio on the electrochemical performance of AC/LiMn2O4 Li-ion hybrid supercapacitors is investigated, especially in the terms of capacity and cyclability at high current density. In this study, we demonstrate the relationship of capacity ratio between anode and cathode electrode, and the excellent electrochemical performance of AC/LiMn2O4 Li-ion hybrid supercapacitors. The remarkable capability of these materials proves that manipulation of the capacity ratio is a promising technology for high-performance Li-ion hybrid supercapacitors.

하이브리드 슈퍼커패시터의 음극 및 양극 설계에 따른 전기화학적 거동

신승일1,이병관2,하민우1†,안건형3,4†
1 명지대학교 전기공학과, 2 ㈜유로셀 연구소, 3 경남과학기술대학교 에너지공학과, 4 경남과학기술대학교 미래융복합연구소

초록

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