Synthesis, structure and electrochemical properties of lanthanum manganese nanofibers doped with Sr and Cu

被引：64
作者：
Cao, Yi [1 ]
Lin, Baoping [1 ]
Sun, Ying [1 ]
Yang, Hong [1 ]
Zhang, Xueqin [1 ]
机构：
[1] Southeast Univ, Sch Chem & Chem Engn, Nanjing 211189, Jiangsu, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 638卷
关键词：
Lanthanum manganese; Supercapacitor; Electrospinning; Nanofibers; Double doping; BIRNESSITE-TYPE MNO2; ELECTRODE MATERIAL; ACTIVATED CARBON; MAGNETIC-PROPERTIES; ASSISTED SYNTHESIS; FACILE SYNTHESIS; NICKEL FOAM; FUEL-CELLS; HIGH-POWER; PERFORMANCE;
D O I：
10.1016/j.jallcom.2015.03.054
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：
LaxSr1-xCu0.1Mn0.9O3-delta (LNF-x) (0.1 <= x <= 1) nanofibers are prepared by electrospun method. The structure of LNF-x and the electrochemical properties of LNF-x in 1 M Na2SO4 aqueous electrolyte are investigated. As a result, LNF-x nanofibers present a perovskite structure, and the LNF-0.5 sample exhibits the highest specific capacitance value of 464.5 F g(-1) at a current density of 2 A g(-1). The maximum energy density of 64.5Wh kg(-1) are achieved at a power density of 2 kW kg(-1) for the symmetric supercapacitor prepared by La0.5Sr0.5Cu0.1Mn0.9O3-delta nanofibers. More importantly, this symmetric supercapacitor also shows an excellent cycling life after 2000 charging and discharging cycles. Those results offer a suitable design of electrode materials for high-performance supercapacitors. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：204 / 213
页数：10
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