Layer - Structured partially reduced graphene oxide sheathed mesoporous MoS2 particles for energy storage applications

Ganesh Prasad Awasthi; Dinesh Kumar; Bishnu Kumar Shrestha; Juyeon Kim; Kyung-Suk Kim; Chan Hee Park; Cheol Sang Kim

doi:10.1016/j.jcis.2018.02.043

Layer - Structured partially reduced graphene oxide sheathed mesoporous MoS₂ particles for energy storage applications

J Colloid Interface Sci. 2018 May 15:518:234-241. doi: 10.1016/j.jcis.2018.02.043. Epub 2018 Feb 14.

Authors

Ganesh Prasad Awasthi¹, Dinesh Kumar¹, Bishnu Kumar Shrestha¹, Juyeon Kim¹, Kyung-Suk Kim², Chan Hee Park³, Cheol Sang Kim⁴

Affiliations

¹ Department of Bionanosystem Engineering, Graduate School, Chonbuk National University, Jeonju 561-756, Republic of Korea.
² Department of Molecular Biology, College of Natural Sciences, Chonbuk National University, Jeonju 561-756, Republic of Korea.
³ Department of Bionanosystem Engineering, Graduate School, Chonbuk National University, Jeonju 561-756, Republic of Korea; Division of Mechanical Design Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea. Electronic address: biochan@jbnu.ac.kr.
⁴ Department of Bionanosystem Engineering, Graduate School, Chonbuk National University, Jeonju 561-756, Republic of Korea; Division of Mechanical Design Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea. Electronic address: chskim@jbnu.ac.kr.

PMID: 29462758
DOI: 10.1016/j.jcis.2018.02.043

Abstract

Mesoporous architectures are remarkable electrode materials for energy storage system due to their large number of active sites and high surface area. Here we report, mesoporous MoS₂ particles (pore diameter 34.04 nm) well attached to the surface of thin layered reduced graphene oxide (rGO) via an ultrasonic chemical method for supercapacitor applications. The rGO not only increases the conductivity of MoS₂ but also provides a substrate for the attachment of MoS₂ with low aggregation. The porous MoS₂ provides a large surface area and sufficient way for the fast transport of electrolyte ions toward electrode materials. As a result, the synthesized MoS₂/rGO composites exhibited excellent electrochemical performance with a specific capacitance 314.5 F/g in 2M KOH aqueous solution at a scan rate of 10 mV/s and excellent specific capacitance retention (80.02%) after 1000 cycles in a three electrode system for energy storage applications.

Keywords: Mesoporous MoS(2); Reduced graphene oxide (rGO); Supercapacitor; Ultrasonic chemical method.