skip to main content

DOE PAGESDOE PAGES

Title: Surface/interface effects on high-performance thin-film all-solid-state Li-ion batteries

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/cm 2 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%.
Authors:
 [1] ;  [2] ;  [1] ;  [1] ;  [1] ;  [1] ;  [3] ;  [1]
  1. Univ. of Maryland, College Park, MD (United States)
  2. U.S. Army Research Lab., Adelphi, MD (United States); National Institute of Standards and Technology, Gaithersburg, MD (United States)
  3. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Publication Date:
Report Number(s):
SAND-2016-12381J
Journal ID: ISSN 1944-8244; 649746
Grant/Contract Number:
AC04-94AL85000
Type:
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 7; Journal Issue: 47; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Research Org:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE; all-solid-state batteries; aluminum; energy storage; silicon; thin-films
OSTI Identifier:
1341747