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Title: Li15P4S16Cl3, a Lithium Chlorothiophosphate as a Solid-State Ionic Conductor

Journal Article · · Inorganic Chemistry
 [1];  [2]; ORCiD logo [2];  [3]; ORCiD logo [4];  [5];  [6];  [1]; ORCiD logo [3]; ORCiD logo [1]
  1. Georgia Inst. of Technology, Atlanta, GA (United States)
  2. Karlsruhe Inst. of Technology, Eggenstein-Leopoldshafen (Germany). Inst. for Applied Materials
  3. Univ. of Maryland, College Park, MD (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  6. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source

Tremendous efforts have been devoted to the design of solid Li+ electrolytes and the development of all-solid-state batteries. Compared with conventional Li-ion batteries, which use flammable liquid organic electrolytes, all-solid-state batteries show significant advantages in safety. In this work, a novel lithium chlorothiophosphate compound, Li15P4S16Cl3, is discovered. The crystal structure and electrochemical properties are investigated. Li15P4S16Cl3 can be synthesized as a pure phase via a facile solid-state reaction by heating a ball-milled mixture of Li2S, P2S5, and LiCl at 360 °C. The crystal structure of Li15P4S16Cl3 was refined against neutron and synchrotron powder X-ray diffraction data, revealing that it crystallizes in the space group $$I\bar{4}3d$$. Furthermore, the Li+ transport in Li15P4S16Cl3 was also investigated by multiple solid-state NMR methods, including variable-temperature NMR line-shape analysis, NMR relaxometry, and pulsed-field-gradient NMR. Li15P4S16Cl3 shows good thermodynamic stability and can be synthesized at relatively low temperature. Although it exhibits a low ionic conductivity at room temperature, it can serve as a new motif crystal structure for the design and development of new solid-state electrolytes.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-06CH11357; SC0012704
OSTI ID:
1601340
Report Number(s):
BNL--213644-2020-JAAM
Journal Information:
Inorganic Chemistry, Journal Name: Inorganic Chemistry Journal Issue: 1 Vol. 59; ISSN 0020-1669
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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