Hierarchical manganese cobalt sulfide core–shell nanostructures for high-performance asymmetric supercapacitors

Shude Liu, Seong Chan Jun

Research output: Contribution to journalArticlepeer-review

111 Citations (Scopus)

Abstract

High electrical conductivity and rational design of structures are two crucial routes to improving the electrochemical performance of electrode materials. However, highly conductive electrode materials with short ion-transport paths remain a challenge in energy storage. Here, we propose manganese cobalt sulfide (MnCo2S4) nanowire wrapping by a flocculent shell layer using a facile hydrothermal method with post-sulfurization treatment. The resultant MnCo2S4electrode employed for supercapacitor delivered a remarkable specific capacitance of 2067 F g−1at the current density of 1 A g−1, good rate capability, and excellent cycling stability. Moreover, an asymmetric supercapacitor device was successfully assembled using MnCo2S4and reduced graphene oxide (rGO) as electrodes, achieving a high energy density of 31.3 W kg−1at a power density of 800 W kg−1. With such outstanding electrochemical performance, this asymmetric supercapacitor device holds great potential in developing high-energy-storage applications.

Original languageEnglish
Pages (from-to)629-637
Number of pages9
JournalJournal of Power Sources
Volume342
DOIs
Publication statusPublished - 2017

Bibliographical note

Funding Information:
This work was partially supported by the Priority Research Centers Program (2009-0093823), and the Korean Government (MSIP) (No. 2015R1A5A1037668) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (MEST) (No. 2009-0093823, 2015R1A5A1037668).

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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