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Title: Probing multiscale transport and inhomogeneity in a lithium-ion cells using in-situ neutron methods

Here, we demonstrate for the first time the lithiation process in graphitic anodes using insitu neutron radiography in a pouch cell format. The neutron absorption contrast shows a direct correlation between degree of lithiation and the discharge voltage plateau. Furthermore, we provide a semi-quantitative comparison between the observed spatial variations of neutron attenuation line profile across the graphite electrode and the calculated lithium concentration profiles computed under similar electrochemical discharge conditions. In conjunction, in situ neutron diffraction of a similar pouch cell under identical test protocol was carried to obtain information about the local phase changes upon lithiation. Combined in-situ radiography and diffraction opens up a powerful nondestructive method to understand the multi-scale nature of lithium transport and degradation in practical lithium-ion cells.
Authors:
 [1] ;  [2] ;  [2] ;  [3] ;  [2] ;  [2] ;  [4] ;  [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); State Univ. of New York, Binghamton, NY (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Saudi Basic Industries Coropration (SABIC), Houston, TX (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Indian Institute of Technology, Hyderabad (India). Dept. of Chemistry
Publication Date:
OSTI Identifier:
1327604
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
ACS Energy Letters
Additional Journal Information:
Journal Volume: 1; Journal Issue: 5; Journal ID: ISSN 2380-8195
Publisher:
American Chemical Society (ACS)
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR); Spallation Neutron Source; Manufacturing Demonstration Facility (MDF)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE