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논문 기본 정보

자료유형
학술저널
저자정보
Byung Gwan Lee (삼화콘덴서공업) Jung Rag Yoon (삼화콘덴서공업)
저널정보
대한전기학회 Journal of Electrical Engineering & Technology Journal of Electrical Engineering & Technology Vol.7 No.2
발행연도
2012.3
수록면
207 - 211 (5page)

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초록· 키워드

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Spinel-Li₄Ti?O₁₂ was successfully synthesized by a solid-phase method at 800, 850, and 900℃ according to the Li₄Ti?O₁₂ cubic spinel phase structure. To achieve higher EDLC energy density with the Li₄Ti?O₁₂, the negative electrode of the hybrid supercapacitor was studied in this work. The electrochemical performances of the hybrid supercapacitor and EDLC were characterized by constant current discharge curves, c-rate, and cycle performance testing. The capacitance (1st cycle) of the hybrid supercapacitor and EDLC was 209 and 109 F, respectively, which is higher than EDLC. The capacitance of the hybrid supercapacitor decreases from 209 F to 101 F after 20 cycles when discharged at several specific current densities ranging from 1 to 10 A. In contrast, capacitance of the EDLC hardly decreases after 20 cycles. Results show that hybrid supercapacitor benefits from the high rate capability of supercapacitor and high capacity of the battery. Findings also prove that the hybrid supercapacitor is an energy storage device where the supercapacitor and the Li ion secondary battery coexist in one cell system.

목차

Abstract
1. Introduction
2. Experimental
3. Results and discussion
4. Conclusion
References

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