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Title: Dendrite‐Free and Performance‐Enhanced Lithium Metal Batteries through Optimizing Solvent Compositions and Adding Combinational Additives

Journal Article · · Advanced Energy Materials
 [1];  [2];  [2];  [3];  [4];  [2];  [2]; ORCiD logo [2]
  1. Energy and Environment Directorate Pacific Northwest National Laboratory Richland WA 99354 USA, School of Materials Science and Engineering Southwest Petroleum University Chengdu Sichuan 610500 China
  2. Energy and Environment Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
  3. Environmental Molecular Sciences Laboratory Pacific Northwest National Laboratory Richland WA 99354 USA
  4. Energy and Environment Directorate Pacific Northwest National Laboratory Richland WA 99354 USA, School of Energy Research Xiamen University Xiamen Fujian 361102 China

Abstract The instability of lithium (Li) metal anodes due to dendritic growth and low Coulombic efficiency (CE) hinders the practical application of high‐energy‐density Li metal batteries. Here, the systematic studies of improving the stability of Li metal anodes and the electrochemical performance of Li metal batteries through the addition of combinational additives and the optimization of solvent compositions in dual‐salt/carbonate electrolytes are reported. A dendrite‐free and high CE of 98.1% for Li metal anode is achieved. The well‐protected Li metal anode and the excellent cyclability and rate capability of the 4‐V Li metal batteries are obtained. This is attributed to the formation of a robust, denser, more polymeric, and higher ionic conductive surface film on the Li metal anode via the electrochemical reductive decompositions of the electrolyte components and the ring‐opening polymerization of additives and cyclic carbonate solvents. The key findings of this work indicate that the optimization of solvent compositions and the manipulation of additives are facile and effective ways to enhance the performances of Li metal batteries.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-05CH11231; AC02-05CH11231
OSTI ID:
1420180
Journal Information:
Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 15 Vol. 8; ISSN 1614-6832
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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