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Related Concept Videos

Heterogeneous Catalysis01:22

Heterogeneous Catalysis

Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
Catalysis01:27

Catalysis

Catalysis influences the rate of chemical reactions by providing an alternative reaction pathway with lower activation energy. A catalyst speeds up a reaction, but it is not consumed during the process. The fundamental principle of catalysis is the ability of a catalyst to alter the reaction mechanism, often introducing a more efficient pathway than the uncatalyzed process.In a catalyzed reaction, the catalyst participates directly in the reaction mechanism. It interacts with reactants to form...

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Related Experiment Video

Updated: Jun 12, 2026

In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries
11:25

In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries

Published on: November 10, 2014

Homogeneous/Heterogeneous Catalyst Design for Lithium-Sulfur Batteries via Phase Separation.

Zhaoyang Shen1, Nanwu Gao1, Yingjie Sun2

  • 1State Key Laboratory of Environment-Friendly Energy Materials, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang, China.

Angewandte Chemie (International Ed. in English)
|June 11, 2026
PubMed
Summary
This summary is machine-generated.

A novel catalyst system for lithium-sulfur (Li-S) batteries enhances performance by dual regulation. This approach improves sulfur conversion and lithium deposition, leading to more robust and efficient energy storage solutions.

Keywords:
homogeneous/heterogeneous catalysisiron phthalocyanine chloridelithium deposition behaviorlithium‐sulfur batteryphase separationsulfur conversion kinetics

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Published on: March 7, 2022

Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Lithium-sulfur (Li-S) batteries face performance limitations due to sulfur redox kinetics and lithium deposition.
  • Metal-based organic molecules offer potential for electrolyte rationalization with nitrogen-rich and active metal properties.

Purpose of the Study:

  • To develop a synergistic catalyst system for Li-S batteries.
  • To simultaneously regulate sulfur conversion and lithium deposition behaviors.
  • To enhance the overall efficiency and lifespan of Li-S batteries.

Main Methods:

  • Utilizing iron phthalocyanine chloride (FePcCl) for phase separation into homogeneous (Fe-Hom) and heterogeneous (Fe-Het) catalysts.
  • Engineering a homogeneous/heterogeneous synergistic catalyst system (Fe-Syg).
  • Loading the insoluble Fe-Het fraction onto carbon spheres.

Main Results:

  • The Fe-Syg system demonstrated synergistic effects from coexisting mobile and immobilized active sites.
  • Improved sulfur conversion kinetics and regulated lithium plating/stripping behavior were observed.
  • Li-S batteries with Fe-Syg showed enhanced rate capability and operational lifespan.
  • A pouch cell achieved 364.8 Wh kg⁻¹ energy density with lean electrolyte and cycled for 40 cycles.

Conclusions:

  • Precise phase-separation engineering of FePcCl creates an effective synergistic catalyst system for Li-S batteries.
  • The Fe-Syg catalyst system overcomes limitations of single-phase catalysts, enabling high-efficiency and robust electrodes.
  • This approach significantly advances the development of high-performance Li-S batteries.