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Title: LaCl3-based sodium halide solid electrolytes with high ionic conductivity for all-solid-state batteries

Journal Article · · Nature Communications
 [1];  [2];  [2]; ORCiD logo [1];  [1]; ORCiD logo [3];  [4];  [5];  [6]; ORCiD logo [7]; ORCiD logo [8]; ORCiD logo [2]; ORCiD logo [1]
  1. Hefei University of Technology (China)
  2. University of Science and Technology of China, Hefei (China)
  3. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  4. Suzhou University of Science and Technology (China)
  5. Chinese Academy of Sciences (CAS), Fuzhou (China). Key Laboratory of Design and Assembly of Functional Nanostructures
  6. Brookhaven National Laboratory (BNL), Upton, NY (United States)
  7. University of Texas at Dallas, Richardson, TX (United States)
  8. Anhui University, Hefei (China)

To enable high performance of all solid-state batteries, a catholyte should demonstrate high ionic conductivity, good compressibility and oxidative stability. Here, a LaCl3-based Na+ superionic conductor (Na1–xZrxLa1–xCl4) with high ionic conductivity of 2.9 × 10–4 S cm–1 (30 °C), good compressibility and high oxidative potential (3.80 V vs. Na2Sn) is prepared via solid state reaction combining mechanochemical method. X-ray diffraction reveals a hexagonal structure (P63/m) of Na1–xZrxLa1–xCl4, with Na+ ions forming a one-dimensional diffusion channel along the c-axis. First-principle calculations combining with X-ray absorption fine structure characterization etc. reveal that the ionic conductivity of Na1–xZrxLa1–xCl4 is mainly determined by the size of Na+-channels and the Na+/La3+ mixing in the one-dimensional diffusion channels. When applied as a catholyte, the NaCrO2||Na0.7Zr0.3La0.7Cl4||Na3PS4||Na2Sn all-solid-state batteries demonstrate an initial capacity of 114 mA h g–1 and 88% retention after 70 cycles at 0.3 C. In addition, a high capacity of 94 mA h g–1 can be maintained at 1 C current density.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
Anhui Provincial Natural Science Foundation; Chinese Academy of Sciences; Fundamental Research Funds for the Central Universities; Major Science and Technology Projects in Anhui Province; National Natural Science Foundation for Distinguished Young Scholars; National Natural Science Foundation of China (NSFC); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
2432547
Report Number(s):
BNL--225924-2024-JAAM
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 15; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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