In Situ TEM Investigation of ZnO Nanowires during Sodiation and Lithiation Cycling
- Department of Mechanical Engineering-Engineering Mechanics, Michigan Technological University, 1400 Townsend Dr. Houghton MI 49933-1295 USA
- Chemical Science and Engineering Division, Argonne National Laboratory, 9700 S. Cass Avenue Argonne IL 60439 USA
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, 842 W. Taylor Street Chicago IL 60607-7059 USA
The development of sodium-ion batteries has drawn lots of attention recently due to the low-cost and eco-friendly sodium source. However, a fundamental understanding of the sodiation behavior for commonly used electrode materials is still limited. Here, combining in situ transmission electron microscopy, aberration-corrected scanning transmission electron microscopy, and ex situ battery cycling tests, the lithiation and sodiation behavior of ZnO nanowires is investigated. The findings show a direct correlation between the mechanical behavior of the lithiated/sodiated ZnO nanowires and their electrochemical cyclability. The mechanical brittleness of LiZn and the formation of nanocracks lead to the poor cyclability of Li-ion batteries with a ZnO anode. However, the sodiated ZnO nanowires show profuse dislocation plasticity. The observed high-density dislocations offer the sodiated ZnO anode more ductility and subsequently better cyclability than its Li-ion counterpart. The results reveal the importance of understanding the correlation between mechanical properties of battery electrodes and their cycling abilities.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE Office of Energy Efficiency and Renewable Energy (EERE) - Office of Vehicle Technology
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1462720
- Journal Information:
- Small Methods, Journal Name: Small Methods Journal Issue: 9 Vol. 1; ISSN 2366-9608
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
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