Iron oxide supercapacitor of high volumetric energy and power density using binder-free supersonic spraying and self-healing rGO

被引：12

作者：

Kim, Taegun ^{[1
]}

Samuel, Edmund ^{[2
]}

Park, Chanwoo ^{[1
]}

Aldalbahi, Ali ^{[3
]}

El-Newehy, Mohamed ^{[3
]}

Kang, Yoonmook ^{[2
]}

Lee, Hae-Seok ^{[2
]}

Yoon, Sam S. ^{[1
]}

机构：

[1] Korea Univ, Sch Mech Engn, Seoul 136713, South Korea

[2] Korea Univ, Grad Sch Energy & Environm, KU KIST Green Sch, Energy Environm Policy & Technol, Seoul, South Korea

[3] King Saud Univ, Coll Sci, Dept Chem, Riyadh 11451, Saudi Arabia

来源：

CERAMICS INTERNATIONAL | 2022年 / 48卷 / 10期

基金：

新加坡国家研究基金会;

关键词：

Fe2O3/rGO sheets; Supersonic spraying; Supercapacitor; Exfoliation; CARBON CLOTH; GRAPHENE; TRANSPARENT; ELECTRODE; FABRICATION; FEOOH; FILMS; COMPOSITES; HYDROXIDES; NANOWIRE;

D O I：

10.1016/j.ceramint.2022.01.250

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Iron oxide (Fe2O3) nanoparticles and reduced graphene oxide (rGO) sheets were supersonically sprayed onto a nickel substrate to fabricate flexible supercapacitors. The supersonic impact velocity was adjusted by varying the air chamber pressure from 2 to 6 bar, which facilitated the self-healing of Stone-Wall defects in rGO sheets. Supersonic spraying caused exfoliation of the rGO sheets, which in turn increased the surface area and adherence of the Fe2O3 nanoparticles. The optimal case exhibited a specific capacitance of 1.44 F.cm(-2) at a current rate of 1.5 mA.cm(-2) and the energy density was 14.23 mW.cm(-3) at 250 mW.cm(-3). The width of the potential window increased to 1.4 V, implying a significant increase in the energy storage capability. The energy density of the supersonically sprayed Fe2O3/rGO electrode also showed no signs of deterioration even when the increased current density interfered with the electrode performance.

引用

页码：13684 / 13694

页数：11

共 57 条

[1] Strategies for reduction of graphene oxide - A comprehensive review [J].