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Updated: Jun 24, 2025
07:47
Reverse Microemulsion-mediated Synthesis of Monometallic and Bimetallic Early Transition Metal Carbide and Nitride Nanoparticles
Published on: November 27, 2015
10.8K
Promoting Li2S Nucleation/Dissolution Kinetics via Multiple Active Sites over TiVCrMoC3Tx Interface.
Qiang Zou1, Qi Liang2,3, Henggang Zhou4
1School of Food and Biological Engineering, Chengdu University, Chengdu, 610106, P. R. China.
Small (Weinheim an Der Bergstrasse, Germany)
|June 3, 2024
Summary
High-entropy MXene doped graphene in lithium-sulfur batteries (LSBs) suppresses polysulfide shuttle and promotes uniform lithium deposition. This innovation significantly enhances cycle stability and energy density for advanced LSBs.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Lithium-sulfur batteries (LSBs) face challenges like polysulfide shuttle and lithium dendrites, limiting their practical application.
- High-entropy materials offer unique properties for advanced energy storage solutions.
Purpose of the Study:
- To develop a novel high-entropy MXene (HE-MXene) doped graphene coating for commercial separators in LSBs.
- To address key limitations in LSBs, including polysulfide migration and lithium anode instability.
Main Methods:
- Design and synthesis of a high-entropy MXene (TiVCrMoC3Tx) doped graphene composite (HE-MXene/G).
- Application of the HE-MXene/G composite as a separator coating in LSBs.
- In situ characterizations to analyze the electrochemical behavior and material interactions.
Main Results:
- The HE-MXene/G coating effectively adsorbs polysulfides and promotes uniform lithium deposition.
- LSBs with the modified separator exhibit high capacity retention (over 1000 cycles at 1C/2C) with minimal decay.
- Exceptional long-term stability demonstrated at low potential and high current density, alongside high sulfur loading.
Conclusions:
- The high-entropy MXene strategy offers a promising pathway for overcoming critical challenges in LSBs.
- This approach enables simultaneous improvements in cathode and anode performance, paving the way for commercially viable LSBs.
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