Effect of iron oxide impregnated in hollow carbon sphere assymmetric supercapacitors

被引：21

作者：

Shi, Xiaoze ^{[1
]}

Zhang, Shuai ^{[1
]}

Chen, Xuecheng ^{[1
,2
]}

Tang, Tao ^{[2
]}

Mijowska, Ewa ^{[1
]}

机构：

[1] West Pomeranian Univ Technol Szczecin, Nanomat Physicochem Dept, Al Piastow 45, PL-70311 Szczecin, Poland

[2] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130021, Jilin, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 726卷

关键词：

Hollow carbon spheres; Iron oxide; Incipient wetness; Symmetric supercapacitors; HIGH-PERFORMANCE ELECTRODES; ELECTROCHEMICAL PROPERTIES; ANODE MATERIAL; POROUS CARBON; SURFACE-AREA; GRAPHENE; NANOCOMPOSITES; FE3O4; CAPACITANCE; SIZE;

D O I：

10.1016/j.jallcom.2017.08.012

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：

Iron oxide impregnated hollow carbon spheres (HCS-Fe3O4) samples w ere fabricated by impregnating Fe(NO3)(3) into hollow carbon spheres (HCS) through an incipient wetness procedure and subsequent heat treatment. Through controlling the amount o f iron species stored in HCS, different samples were selectively prepared. Pristine HCS and the samples with different Fe3O4 loading (HCSFe3O4-1, HCS-Fe3O4-2 and HCS-Fe3O4-3) were characterized by TEM, XRD, TGA and N-2 adsorption/desorption isotherms in detail, respectively. As electrode materials of supercapacitor, their capacitive performances have been investigated by CV, galvanostatic charge/discharge and EIS measurements in two-electrode system using different kinds o f electrolytes. Owing to the optimal pore size and partially filled cavity structure, electrolyte ions exhibit easy and reversible transport through HCS-Fe3O4-2. So that HCS-Fe3O4-2 presents the highest specific capacitance of 193 F g(-1) at a scan rate of 1 mV s(-1) and retains 94.75% up to 10,000 cycles. The capacitance performance of this material tested by symmetric system showed even higher value than the results by three-electrode system from some other researches, indicating the potential applications of HCS-Fe3O4-2 in industrial and energy field. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：466 / 473

页数：8

共 55 条

[1] Ultracapacitors: why, how, and where is the technology [J].