Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 18, Pages 11532-11538Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b02759
Keywords
aerogel; V2O5; pair distribution function; X-ray photoelectron spectroscopy; lithium ion battery; cathodes
Funding
- American Chemical Society Petroleum Research Fund at Binghamton University [PRF 52827-DNI10]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [AC02-98CH10886]
- Science Foundation Ireland (SFI) [12/IA/1414]
- Science Foundation Ireland (SFI) [12/IA/1414] Funding Source: Science Foundation Ireland (SFI)
Ask authors/readers for more resources
V2O5 aerogels are capable of reversibly intercalating more than 5 Li+/V2O5 but suffer from lifetime issues due to their poor capacity retention upon cycling. We employed a range of material characterization and electro-chemical techniques along with atomic pair distribution function, X-ray photoelectron spectroscopy, and density functional theory to determine the origin of the capacity fading in V2O5 aerogel cathodes. In addition to the expected vanadium redox due to intercalation, we observed LiOH species that formed upon discharge and were only partially removed after charging, resulting in an accumulation of electrochemically inactive LiOH over each cycle. Our results indicate that the tightly bound water that is necessary for maintaining the aerogel structure is also inherently responsible for the capacity fade.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available