文献类型：期刊文献

中文题名：Rational design of novel ultra-small amorphous Fe_(2)O_(3)nanodots/graphene heterostructures for all-solid-state asymmetric supercapacitors

作者：Chenxiao Wu[1,2];Zhifang Zhang[3];Zhonghui Chen[2];Zuimin Jiang[3];Huiyu Li[1];Haijing Cao[1];Yongsheng Liu[1];Yanyan Zhu[1];Zebo Fang[4];Xiangrong Yu[5]

机构：[1]College of Mathematics and Physics,Shanghai University of Electric Power,Shanghai 200090,China;[2]Key Lab for Special Functional Materials of Ministry of Education,School of Materials Science and Engineering,Henan University,Kaifeng 475004,China;[3]Department of Physics,Fudan University,Shanghai 200433,China;[4]Department of Physics,Shaoxing University,Shaoxing 312000,China;[5]Department of Medical Imaging,Zhuhai Peoples Hospital,Zhuhai Hospital affiliated with Jinan University,Zhuhai 519000,China

年份：2021

卷号：14

期号：4

起止页码：953

中文期刊名：纳米研究：英文版

收录：CSTPCD、、CSCD2021_2022、Scopus、CSCD、PubMed

基金：the fund for post-doctoral program of Henan University to Z.H.C.(No.FJ3050A0670001);the National Natural Science Foundation of China(Nos.51672172,51872186).

语种：英文

中文关键词：graphene;heterostructures;amorphous Fe_(2)O_(3);Co_(3)O_(4);all-solid-state asymmetric supercapacitors

中文摘要：Constructing graphene-based heterostructures with large interfacial area is an efficient approach to enhance the electrochemical performance of supercapacitors but remains great challenges in their synthesis.Herein,a novel ultra-small amorphous Fe_(2)O_(3)nanodots/graphene heterostructure(a-Fe_(2)O_(3)NDs/RGO)aerogel was facilely synthesized via excessive metal-ion-induced self-assembly and subsequent calcination route using Prussian blue/graphene oxide(PB/GO)composite aerogel as precursors.The deliberately designed a-Fe_(2)O_(3)NDs/RGO heterostructure offers a highly interconnected porous conductive network,large heterostructure interfacial area,and plenty of accessible active sites,greatly facilitating the electron transfer,electrolyte diffusion,and pseudocapacitive reactions.The obtained a-Fe_(2)O_(3)NDs/RGO aerogel could be used as flexible free-standing electrodes after mechanical compression,which exhibited a significantly enhanced specific capacitance of 347.4 F·g^(-1)at 1 A·g^(-1),extraordinary rate capability of 184 F·g^(-1)at 10 A·g^(-1),and decent cycling stability.With the as-prepared a-Fe_(2)O_(3)NDs/RGO as negative electrodes and the Co_(3)O_(4)NDs/RGO as positive electrodes,an all-solid-state asymmetric supercapacitor(a-Fe_(2)O_(3)NDs/RGO//Co_(3)O_(4)NDs/RGO asymmetric supercapacitor(ASC))was assembled,which delivered a high specific capacitance of 69.1 F·g^(-1)at 1 A·g^(-1)and an impressive energy density of 21.6 W·h·k·g^(-1)at 750 W·k·g^(-1),as well as good cycling stability with a capacity retention of 94.3%after 5,000 cycles.This work provides a promising avenue to design high-performance graphene-based composite electrodes and profound inspiration for developing advanced flexible energy-storage devices.