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Superstructure Control of Anionic Redox Behavior in Manganese-Based Cathode Materials for Li-Ion Batteries
Zhe Yang1, Jianjian Zhong1, Chaoliang Zheng1
1State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
ACS Applied Materials & Interfaces
|July 27, 2022
Summary
Researchers developed manganese-based cathode materials to improve lithium-ion battery performance. Controlling the material
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Anionic charge compensation is key for high-capacity lithium-ion battery cathodes.
- Labile anionic redox causes voltage hysteresis, capacity fade, and structural changes.
- Li-Mn ordered superstructures trigger anionic charge compensation.
Purpose of the Study:
- Investigate superstructure control of anionic redox behavior in manganese-based cathodes.
- Improve voltage hysteresis and capacity fading in lithium-ion batteries.
- Enhance electrochemical performance through rational material design.
Main Methods:
- Prepared manganese-based cathode materials with various Li-Mn ordered superstructures.
- Utilized an ion exchange method for material synthesis.
- Investigated superstructure control of anionic redox behavior.
Main Results:
- Dispersing LiMn6 superstructure units inhibited Li vacancy aggregation.
- Eliminated O-O dimer formation, improving oxygen redox reversibility.
- Significantly improved voltage hysteresis and capacity fading.
Conclusions:
- Superstructure control offers a viable strategy for mitigating anionic redox issues.
- Rational design of superstructures can enhance lithium-ion battery performance.
- This work provides insights for utilizing anionic redox in energy storage materials.
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