Ultrastable 1T-2H WS2 Heterostructures by Nanoarchitectonics of Phosphorus-Triggered Phase Transition for Hybrid Supercapacitors: ACS Energy Letters

P.A. Shinde, N.R. Chodankar, Hyung-Jin Kim, Mohammad Ali Abdelkareem, Amal Al Ghaferi, Young-Kyu Han, A.G. Olabi, Katsuhiko Ariga

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Tungsten disulfide (WS2) has recently emerged as a nontrivial material for electrochemical applications; however, boundaries associated with its 1T and 2H phases limit its performance. Here, this issue is addressed by evolving a dual-phase 1T-2H WS2 heterostructure that combines two different phases directly on the current collector. The resulting material demonstrated a 2D transformable phase structure, large interlayer distance, and highly exposed edge-active sites. Theoretical calculations confirmed that the 1T WS2 formed after phosphorus doping exhibits a semimetallic feature, elucidating a high electronic conductivity. The edge-enriched metallic phase and interlayer engineering of the 1T-2H WS2 heterostructure validate exceptional Na+ ion intercalation. The hybrid supercapacitor cell assembled with the 1T-2H WS2 anode and Prussian blue analogue (PBA) cathode shows a specific energy of 65.5 Wh kg-1 at 784 W kg-1, and 95.7% cycling stability. This work paves a technique for phase transition and sheds light on the expansion of efficient energy storage devices. © 2023 American Chemical Society.
Original languageBritish English
Pages (from-to)4474-4487
Number of pages14
JournalACS Energy Lett.
Volume8
Issue number10
DOIs
StatePublished - 2023

Keywords

  • Electrodes
  • Phosphorus
  • Sulfur compounds
  • Supercapacitor
  • Active site
  • Current-collector
  • Dual phase
  • Dual phasis
  • Electrochemical applications
  • Hybrid supercapacitors
  • Interlayer distance
  • Performance
  • Resulting materials
  • Triggered phase transition
  • Tungsten compounds

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