Surface/interface effects on high-performance thin-film all-solid-state Li-ion batteries
Journal Article
·
· ACS Applied Materials and Interfaces
- Univ. of Maryland, College Park, MD (United States)
- U.S. Army Research Lab., Adelphi, MD (United States); National Institute of Standards and Technology, Gaithersburg, MD (United States)
- Sandia National Lab. (SNL-CA), Livermore, CA (United States)
The further development of all-solid-state batteries is still limited by the understanding/engineering of the interfaces formed upon cycling. Here, we correlate the morphological, chemical, and electrical changes of the surface of thin-film devices with Al negative electrodes. The stable Al–Li–O alloy formed at the stress-free surface of the electrode causes rapid capacity fade, from 48.0 to 41.5 μAh/cm2 in two cycles. Surprisingly, the addition of a Cu capping layer is insufficient to prevent the device degradation. Furthermore, Si electrodes present extremely stable cycling, maintaining >92% of its capacity after 100 cycles, with average Coulombic efficiency of 98%.
- Research Organization:
- Sandia National Lab. (SNL-CA), Livermore, CA (United States); Energy Frontier Research Centers (EFRC) (United States). Nanostructures for Electrical Energy Storage (NEES)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC04-94AL85000; SC0001160
- OSTI ID:
- 1341747
- Report Number(s):
- SAND-2016-12381J; 649746
- Journal Information:
- ACS Applied Materials and Interfaces, Vol. 7, Issue 47; ISSN 1944-8244
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 24 works
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