Battery-type graphene/BiOBr composite for high-performance asymmetrical supercapacitor

被引：41
|
作者：
Deng, Lingjuan [1 ]
Ma, Zhanying [1 ]
Liu, Zong-huai [2 ,3 ]
Fan, Guang [1 ]
机构：
[1] Xianyang Normal Univ, Coll Chem & Chem Engn, Xianyang 712000, Peoples R China
[2] Shaanxi Normal Univ, Minist Educ, Key Lab Appl Surface & Colloid Chem, Xian 710062, Shaanxi, Peoples R China
[3] Shaanxi Normal Univ, Sch Mat Sci & Engn, Xian 710062, Shaanxi, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2020年 / 812卷
关键词：
GR/BiOBr composite; Asymmetrical supercapacitor; Energy density; Power density; BINDER-FREE ELECTRODE; ENERGY-STORAGE; HYBRID; OXIDE; EFFICIENT; CARBON; ANODE; ELECTROCATALYSTS; NANOSTRUCTURES; NANOCOMPOSITES;
D O I：
10.1016/j.jallcom.2019.152087
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：
Battery-type electrode materials are utilised in high performance supercapacitors. Herein, graphene/ BiOBr (GR/BiOBr) composite is prepared by one-step solvothermal method and firstly used in supercapacitors. The results of the dynamic calculations suggest that the key feature of the GR/BiOBr composite is its battery-like performance. When used as an electrode in a three-electrode system, the GR/BiOBr composite can deliver an excellent specific capacity of 491 Cg(-1) at 1 Ag-1. An asymmetrical supercapacitor cell with a voltage of 1.4 V for the aid of GR/BiOBr (negative electrode) and Ni-Co-Al LDH (positive electrode) is assembled. The symmetrical supercapacitor achieves a high energy density of 29.2 Wh kg(-1) corresponding to a power density of 700 W kg(-1). This study shows that GR/BiOBr composite has a great potential for high performance supercapacitors. (C) 2019 Elsevier B.V. All rights reserved.
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页数：8
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