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Updated: Jan 7, 2026
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Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy
Published on: January 20, 2023
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Simultaneous Optimization of Internal Electric Fields and High-Valence Cations in Cathode Coating Microstructures
Kai Yang1,2, Yiming Sun3, Jing Wang1,2
1Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, no. 29 Yudao Street, Nanjing 210016, China.
ACS Nano
|January 2, 2026
Summary
Cathode coatings in sulfide all-solid-state batteries are key for safety and performance. Optimizing coating microstructure, like using LiNbO3, enhances ion transport and stability by tuning internal electric fields.
Area of Science:
- Materials Science
- Electrochemistry
- Solid-State Batteries
Background:
- Sulfide all-solid-state batteries offer high safety and performance for next-generation power sources.
- Cathode coatings are crucial for improving battery performance, but their structural influence on interfacial properties is not fully understood.
Purpose of the Study:
- To investigate the impact of coating material's intrinsic structure on interfacial properties in sulfide all-solid-state batteries.
- To explore the synergistic interaction between high-valence cations and the internal electric field induced by coating microstructure.
Main Methods:
- Profiling interfacial behavior between LiNbO3 (LNO) and Li3NbO4 (L3NO4) coatings on LiCoO2 (LCO) cathodes.
- Systematic investigation of coating microstructure effects on battery performance.
Main Results:
- LiNbO3 coatings create a tuned internal electric field, enhancing Li+ transport and suppressing side reactions for superior cycling stability.
- Li3NbO4 coatings result in inefficient electric fields and higher charge transfer barriers, leading to interface degradation and limited performance.
Conclusions:
- Optimizing cation properties and internal electric fields at the microstructural level is critical for designing high-performance solid-state battery interfaces.
- The choice of coating material significantly impacts interfacial stability and overall battery performance.
