Morphology-controlled MnO2-graphene oxide-diatomaceous earth 3-dimensional (3D) composites for high-performance supercapacitors

Zhong Quan Wen; Min Li; Fei Li; Shi Jin Zhu; Xiao Ying Liu; Yu Xin Zhang; Tushar Kumeria; Dusan Losic; Yang Gao; Wei Zhang; Shi Xuan He

doi:10.1039/c5dt04082e

Morphology-controlled MnO2-graphene oxide-diatomaceous earth 3-dimensional (3D) composites for high-performance supercapacitors

Dalton Trans. 2016 Jan 21;45(3):936-42. doi: 10.1039/c5dt04082e.

Authors

Zhong Quan Wen¹, Min Li¹, Fei Li², Shi Jin Zhu², Xiao Ying Liu², Yu Xin Zhang³, Tushar Kumeria⁴, Dusan Losic⁴, Yang Gao⁵, Wei Zhang⁶, Shi Xuan He⁶

Affiliations

¹ College of Optoelectronic Engineering, Key Laboratory of Fundamental Science of Micro/Nano-Devices and System Technology, Chongqing University, Chongqing 400044, PR China. wenzq@cqu.edu.cn zhangyuxin@cqu.edu.cn.
² College of Materials Science and Engineering, Chongqing University, Chongqing 400044, PR China.
³ College of Optoelectronic Engineering, Key Laboratory of Fundamental Science of Micro/Nano-Devices and System Technology, Chongqing University, Chongqing 400044, PR China. wenzq@cqu.edu.cn zhangyuxin@cqu.edu.cn and College of Materials Science and Engineering, Chongqing University, Chongqing 400044, PR China.
⁴ School of Chemical Engineering, The University of Adelaide, Adelaide, SA 5005, Australia. dusan.losic@adelaide.edu.au.
⁵ Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang 621900, PR China.
⁶ Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, PR China.

PMID: 26645931
DOI: 10.1039/c5dt04082e

Abstract

3-Dimensional (3D) composites based on a unique combination of MnO2-nanostructures, graphene oxide nanosheets and porous Diatomaceous Earth (DE) microparticles (GO-DE@MnO2) were synthesized and explored for application in high-performance supercapacitors. To explore the influence of the structural properties of MnO2 nanostructures on supercapacitor performances, several MnO2 structures with nanosheet and nanowire morphologies were synthesized and characterized. The prepared GO-DE@MnO2 composites with MnO2 nanosheets due to their higher conductivity and higher surface area showed a larger specific capacitance of 152.5 F g(-1) and a relatively better cycle stability (83.3% capacitance retention after 2000 cycles at a scan rate of 2 A g(-1)), indicating great potential for application in supercapacitors.

Publication types

Research Support, Non-U.S. Gov't