Moderate oxygen-deficient Fe(III) oxide nanoplates for high performance symmetric supercapacitors

被引：36

作者：

Zhang, Shengming ^{[1
]}

Wang, Xuhui ^{[1
]}

Li, Yan ^{[1
]}

Zhang, Yaxiong ^{[1
]}

Hu, Qiang ^{[1
]}

Hua, Xiaohui ^{[1
]}

Liu, Guo ^{[1
]}

Xie, Erqing ^{[1
]}

Zhang, Zhenxing ^{[1
]}

机构：

[1] Lanzhou Univ, Sch Phys Sci & Technol, Key Lab Magnetism & Magnet Mat, Key Lab Special Funct Mat & Struct Design,Minist, Lanzhou 730000, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2020年 / 565卷

基金：

中国国家自然科学基金;

关键词：

Iron oxide; Oxygen vacancy; High capacity; Symmetric supercapacitor; CARBON CLOTH; ASYMMETRIC SUPERCAPACITORS; NANOTUBE ARRAYS; ENERGY-DENSITY; DOPED CARBON; ALPHA-FE2O3; VACANCIES; ELECTRODE; NANOSHEETS; NANOWIRES;

D O I：

10.1016/j.jcis.2020.01.060

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：

As a promising anode material for supercapacitors, Fe2O3 has been widely studied but still face the problem of low conductivity. Inducing oxygen vacancy (Vo) into Fe2O3 is a widely used approach to tune the conductivity to enhance its capacitive performance, but there is little research on the influence of Vo content. Herein, we report the effect of Vo in Fe2O3 nanoplates with various content. We tuned the Vo content by annealing at 200-500 degrees C. XPS and EPR were taken to characterize the Vo content, ranging from 11% to 26%. Electrochemical results show that FO-300 with 17% Vo has the highest capacity of 301 mAh g(-1), and the capacity of the highest Vo content's (26% Vo) is only 107 mAh g(-1). The symmetric supercapacitor based on FO-300 shows a considerably high energy density of 58.5 Wh kg(-1) at a power density of 9.32 kW kg(-1) and remains 84.6% after 12,000 cycles. (C) 2020 Elsevier Inc. All rights reserved.

引用

页码：458 / 464

页数：7

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