Synthesis of flower-like Mn-Co-MoS2 compounds for high-performance asymmetric supercapacitors

Chii Rong Yang, Yu Ping Chang, Shih Feng Tseng*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

This study aimed to intercalate manganese (Mn) and cobalt (Co) ions in molybdenum disulfide (MoS2) to synthesize Mn-Co-MoS2 compounds using a simple one-step hydrothermal process. Surface morphologies, material properties, and electrochemical characteristics of the synthesized Mn-MoS2, Co-MoS2, and Mn-Co-MoS2 compounds were investigated. The Mn-Co-MoS2 electrode demonstrated excellent pseudocapacitive characteristics compared to the Mn-MoS2 and Co-MoS2 electrodes that had a high specific capacitance of 268.7 F/g at a current density of 1 A/g, low charge transfer resistance of 10.4 Ω, and good capacitance retention of 81.2% after 5000 charge-discharge cycles at a current density of 10 A/g. The Mn-Co-MoS2 composite and activated carbon (AC) were selected as cathode and anode electrodes for asymmetric supercapacitors, respectively. Furthermore, asymmetric Mn-Co-MoS2//AC supercapacitors achieved good cycle stability, retention performance, specific capacitance of 24.18 F/g, discharge time of 40 s, energy density of 20.51 Wh/kg, and power density of 819.71 W/kg. Additionally, the assembled asymmetric Mn-Co-MoS2//AC supercapacitors were used to test the green light emitting diode lights, which exhibited excellent charge storage capacity. The results confirmed that Mn-Co-MoS2 compounds with flower-like structures had high active sites, excellent specific capacitance, and good cycle stability and were suitable for use in energy storage devices.

Original languageEnglish
Pages (from-to)3661-3671
Number of pages11
JournalInternational Journal of Advanced Manufacturing Technology
Volume128
Issue number7-8
DOIs
Publication statusPublished - 2023 Oct

Keywords

  • Asymmetric supercapacitors
  • Facile one-step hydrothermal method
  • Flower-like structure
  • Good cycle stability
  • High active site
  • Mn-Co-MoS compounds

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Software
  • Mechanical Engineering
  • Computer Science Applications
  • Industrial and Manufacturing Engineering

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