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Atomically Dispersed Ruthenium Catalysts with Open Hollow Structure for Lithium-Oxygen Batteries
Xin Chen1, Yu Zhang2, Chang Chen3
1Beijing Advanced Innovation Center for Materials Genome Engineering, Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China.
Nano-Micro Letters
|November 22, 2023
Summary
Researchers developed a novel cathode catalyst for lithium-oxygen batteries. This catalyst, featuring N-doped carbon with atomically dispersed ruthenium, enhances energy storage by improving discharge product decomposition and cycling stability.
Area of Science:
- Electrochemistry
- Materials Science
- Energy Storage
Background:
- Lithium-oxygen batteries offer high theoretical energy density but face challenges with discharge product decomposition.
- Efficient catalysis is crucial for overcoming kinetic limitations in lithium-oxygen battery operation.
Purpose of the Study:
- To develop an advanced cathode catalyst for lithium-oxygen batteries that addresses the issue of difficult discharge product decomposition.
- To enhance the redox kinetics and cycling stability of lithium-oxygen batteries through catalyst design.
Main Methods:
- Synthesis of N-doped carbon anchored atomically dispersed Ru sites with an open hollow structure (h-RuNC).
- Electrochemical characterization to evaluate the catalytic performance for lithium-oxygen battery applications.
Main Results:
- The h-RuNC catalyst demonstrated effective catalysis for the formation and decomposition of discharge products.
- Atomically dispersed Ru sites significantly enhanced redox kinetics.
- The open hollow structure improved the mass activity of Ru sites and facilitated catalytic molecule diffusion.
- The catalyst contributed to improved cycling stability and overall high performance.
Conclusions:
- The developed h-RuNC cathode catalyst effectively overcomes key limitations in lithium-oxygen batteries.
- The combination of atomically dispersed Ru sites and an open hollow structure is a promising strategy for high-performance lithium-oxygen batteries.
