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Revealing the Design Principle for Highly Compositional Reversible Transition Metal Chalcogenide Electrodes: A
Tongfeng Liu1, Yirun Wang1, Jingwen Zhou2
1School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300350, P. R. China.
Transition metal chalcogenides (TMCs) show promise for alkali metal ion batteries (AMIBs). This perspective details strategies to enhance their reversible conversion reactions for improved battery performance and longevity.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Transition metal chalcogenides (TMCs) are promising anode materials for alkali metal ion batteries (AMIBs) due to their multielectron transfer and low cost.
- However, sluggish kinetics and irreversible conversion reactions limit their electrochemical performance and lead to rapid battery failure.
Purpose of the Study:
- To systematically understand the reversible conversion reaction mechanism and design principles for TMC electrodes in AMIBs.
- To elucidate modification strategies for enhancing the electrochemical performance of TMCs.
Main Methods:
- Combines computational and experimental approaches to analyze TMCs.
- Reviews structure, composition, and interface modification strategies.
Main Results:
- Discusses three modification strategies: multi-scale structure construction, TMC-based composite fabrication, and interfacial engineering.
- Explains the working mechanisms of these strategies in promoting reversible conversion reactions.
Conclusions:
- Summarizes the general design principle for compositional reversible TMC electrodes in AMIBs.
- Provides fundamental insights for designing highly reversible electrodes in conversion-type batteries.
- Highlights future research opportunities in this field.
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