A novel asymmetric hybrid supercapacitor based on Li2FeSiO4 and activated carbon electrodes

被引：120

作者：

Karthikeyan, K. ^{[1
]}

Aravindan, V. ^{[2
]}

Lee, S. B. ^{[1
]}

Jang, I. C. ^{[1
]}

Lim, H. H. ^{[1
]}

Park, G. J. ^{[3
]}

Yoshio, M. ^{[3
]}

Lee, Y. S. ^{[1
]}

机构：

[1] Chonnam Natl Univ, Fac Appl Chem Engn, Kwangju 500757, South Korea

[2] Chonnam Natl Univ, Res Inst Catalysis, Kwangju 500757, South Korea

[3] Saga Univ, Dept Appl Chem, Saga 8408502, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 504卷 / 01期

关键词：

Li2FeSiO4; Cathode materials; Activated carbon; Hybrid supercapacitor; Energy density; ELECTROCHEMICAL PERFORMANCE; DOUBLE-LAYER; CAPACITORS; BATTERY;

D O I：

10.1016/j.jallcom.2010.05.097

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A novel, hybrid supercapacitor is fabricated with Li2FeSiO4 (LFSO) as the negative electrode and activated carbon (AC) as the positive electrode in a standard, non-aqueous 1.0 M LiPF6-EC/DMC electrolyte. The electrochemical properties of the LFSO/AC hybrid supercapacitor are investigated by means of cyclic voltammetry (CV), charge/discharge (C/D) measurement and electrochemical impedance spectroscopy (EIS). The CV results reveal the typical capacitance behavior of the LFSO/AC cell within the potential range of 0-3 V. The LFSO/AC cell presents a high discharge capacitance (D-SC) of 49 F g(-1) at a current density of 1 mA cm(-2) and delivers a specific energy of 43 Wh kg(-1) and a specific power of 200 W kg(-1). The cell exhibits excellent cycleability and greater efficiency over 1000 cycles. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：224 / 227

页数：4

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