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This content will become publicly available on November 6, 2018

Title: Behavior of Lithium Metal Anodes under Various Capacity Utilization and High Current Density in Lithium Metal Batteries

We report that lithium (Li) metal batteries (LMBs) have recently attracted extensive interest in the energy-storage field after silence from the public view for several decades. However, many challenges still need to be overcome before their practical application, especially those that are related to the interfacial instability of Li metal anodes. Here, we reveal for the first time that the thickness of the degradation layer on the metallic Li anode surface shows a linear relationship with Li areal capacity utilization up to 4.0 mAh cm -2 in a practical LMB system. The increase in Li capacity utilization in each cycle causes variations in the morphology and composition of the degradation layer on the Li anode. Under high Li capacity utilization, the current density for charge (i.e., Li deposition) is identified to be a key factor controlling the corrosion of the Li metal anode. Lastly, these fundamental findings provide new perspectives for the development of rechargeable LMBs.
Authors:
 [1] ;  [2] ;  [2] ;  [3] ;  [4] ;  [1] ;  [2] ;  [2]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Energy and Environment Directorate; University of Science and Technology of China, Hefei (China). Department of Materials Science and Engineering
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Energy and Environment Directorate
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Energy and Environment Directorate ; Southwest Petroleum University, Chengdu (China). School of Materials Science and Engineering
  4. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Laboratory
Publication Date:
Report Number(s):
PNNL-SA-125205
Journal ID: ISSN 2542-4351; PII: S2542435117301319; TRN: US1800442
Grant/Contract Number:
AC05-76RL01830; AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
Joule
Additional Journal Information:
Journal Volume: 2; Journal Issue: 1; Journal ID: ISSN 2542-4351
Publisher:
Elsevier
Research Org:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE; lithium capacity utilization; degradation layer; electrode loading; cycling performance; lithium metal battery
OSTI Identifier:
1413509