Electrochemical performance of carbon-coated lithium manganese silicate for asymmetric hybrid supercapacitors

被引：110

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 POWER SOURCES | 2010年 / 195卷 / 11期

关键词：

Capacitance; Carbon-coated lithium manganese silicate; Hybrid supercapacitor; Activated carbon; Specific energy; Specific power; LI2MNSIO4; LI2FESIO4;

D O I：

10.1016/j.jpowsour.2009.11.138

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：

Nanoscale carbon-coated Li2MnSiO4 powder is prepared using a conventional solid-state method and can be used as the negative electrode in a Li2MnSiO4/activated carbon (AC) hybrid supercapacitor. Carbon-coated Li2MnSiO4 material presents a well-developed orthorhombic crystal structure with a Pmn2(1) space group, although there is a small impurity of MnO. The maximum specific capacitance of the Li2MnSiO4/AC hybrid supercapacitor is 43.2 F g(-1) at 1 mA cm(-2) current density. The cell delivers a specific energy as high as 54 Wh kg(-1) at a specific power of 150 W kg(-1) and also exhibits an excellent cycle performance with more than 99% columbic efficiency and the maintenance of 85% of its initial capacitance after 1000 cycles. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.

引用

页码：3761 / 3764

页数：4

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