Insights into the Performance Degradation of Oxygen-Type Manganese-Rich Layered Oxide Cathodes for High-Voltage Sodium-Ion Batteries
- Argonne National Lab. (ANL), Argonne, IL (United States). Chemical Sciences and Engineering Division; Univ. of Rochester, NY (United States). Materials Science Program
- Argonne National Lab. (ANL), Argonne, IL (United States). Chemical Sciences and Engineering Division
- Univ. of Illinois, Chicago, IL (United States). Dept. of Mechanical and Industrial Engineering
- Microvast Inc., Stafford, TX (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division. Advanced Photon Source
- Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
- Univ. of Rochester, NY (United States). Materials Science Program. Dept. of Chemical Engineering
- Argonne National Lab. (ANL), Argonne, IL (United States). Chemical Sciences and Engineering Division; Stanford Univ., CA (United States). Materials Science and Engineering
The cost of batteries is becoming as important as the energy density for large-scale electrochemical energy storage application. Sodium manganese-rich layered oxides (P-type and O-type) are thus one of the promising cathode materials for rechargeable batteries because of the relatively low cost of manganese and sodium. The O-type cathodes are more promising for practical application owing to their high sodium-ion stoichiometry. However, most of these materials suffer from rapid capacity decay during high-voltage cycling. We used synchrotron X-ray probes coupled with electrochemical techniques to disclose the structural evolution of α-NaMnO2 during solid-state synthesis and electrochemical cycling. During high-voltage cycling, a substantial increase of interfacial microstrain from both stacking faults and Mn cation migration was found to pin down this material’s layered structures and simultaneously block the diffusion pathways of Na+, thus leading to the performance degradation. The findings presented in this work can guide future development of high-performance sodium-ion cathode materials.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Illinois, Chicago, IL (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
- Grant/Contract Number:
- AC02-06CH11357; CMMI-1619743
- OSTI ID:
- 1493916
- Journal Information:
- ACS Applied Energy Materials, Vol. 1, Issue 10; ISSN 2574-0962
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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