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Title: Tailoring Solution-Processable Li Argyrodites Li6+xP1-xMxS5I (M = Ge, Sn) and Their Microstructural Evolution Revealed by Cryo-TEM for All-Solid-State Batteries

Abstract

Owing to their high Li+ conductivities, mechanical sinterability, and solution processability, sulfide Li argyrodites have attracted much attention as enablers in the development of high-performance all-solid-state batteries with practicability. However, solution-processable Li argyrodites have been developed only for a composition of Li6PS5X (X = Cl, Br, I) with insufficiently high Li+ conductivities (~10–4 S cm–1). In this work, we report the highest Li+ conductivity of 0.54 mS cm–1 at 30 °C (Li6.5P0.5Ge0.5S5I) for solution-processable iodine-based Li argyrodites. Furthermore, a comparative investigation of three iodine-based argyrodites of unsubstituted and Ge- and Sn-substituted solution-processed Li6PS5I with varied heat-treatment temperature elucidates the effect of microstructural evolution on Li+ conductivity. Notably, local nanostructures consisting of argyrodite nanocrystallites in solution-processed Li6.5P0.5Ge0.5S5I have been directly captured by cryogenic transmission electron microscopy, which is a first for sulfide solid electrolyte materials. Specifically, the promising electrochemical performances of all-solid-state batteries at 30 °C employing LiCoO2 electrodes tailored by the infiltration of Li6.5P0.5Ge0.5S5I–ethanol solutions are successfully demonstrated.

Authors:
 [1];  [1];  [1];  [2];  [3];  [4]; ORCiD logo [5]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [1]
  1. Hanyang Univ., Seoul (Korea, Republic of)
  2. Dongguk Univ., Seoul (Korea, Republic of)
  3. Ulsan National Institute of Science and Technology (UNIST), Ulsan (Korea, Republic of)
  4. UNIST Central Research Facilities (UCRF), Ulsan (Korea, Republic of)
  5. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); National Research Foundation of Korea (NRF); National Research Council of Science & Technology (NST)
OSTI Identifier:
1642414
Report Number(s):
BNL-216186-2020-JAAM
Journal ID: ISSN 1530-6984
Grant/Contract Number:  
SC0012704; NRF-2017M1A2A2044501; NRF-2018R1A2B600499; 2019R1C1C1009324
Resource Type:
Accepted Manuscript
Journal Name:
Nano Letters
Additional Journal Information:
Journal Volume: 20; Journal Issue: 6; Journal ID: ISSN 1530-6984
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; Solid-state batteries; solid electrolytes; cryo-TEM; sulfides; solution processes; electrodes; physical and chemical processes; electrical conductivity

Citation Formats

Song, Yong Bae, Kim, Dong Hyeon, Kwak, Hiram, Han, Daseul, Kang, Sujin, Lee, Jong Hoon, Bak, Seong-Min, Nam, Kyung-Wan, Lee, Hyun-Wook, and Jung, Yoon Seok. Tailoring Solution-Processable Li Argyrodites Li6+xP1-xMxS5I (M = Ge, Sn) and Their Microstructural Evolution Revealed by Cryo-TEM for All-Solid-State Batteries. United States: N. p., 2020. Web. doi:10.1021/acs.nanolett.0c01028.
Song, Yong Bae, Kim, Dong Hyeon, Kwak, Hiram, Han, Daseul, Kang, Sujin, Lee, Jong Hoon, Bak, Seong-Min, Nam, Kyung-Wan, Lee, Hyun-Wook, & Jung, Yoon Seok. Tailoring Solution-Processable Li Argyrodites Li6+xP1-xMxS5I (M = Ge, Sn) and Their Microstructural Evolution Revealed by Cryo-TEM for All-Solid-State Batteries. United States. https://doi.org/10.1021/acs.nanolett.0c01028
Song, Yong Bae, Kim, Dong Hyeon, Kwak, Hiram, Han, Daseul, Kang, Sujin, Lee, Jong Hoon, Bak, Seong-Min, Nam, Kyung-Wan, Lee, Hyun-Wook, and Jung, Yoon Seok. Tue . "Tailoring Solution-Processable Li Argyrodites Li6+xP1-xMxS5I (M = Ge, Sn) and Their Microstructural Evolution Revealed by Cryo-TEM for All-Solid-State Batteries". United States. https://doi.org/10.1021/acs.nanolett.0c01028. https://www.osti.gov/servlets/purl/1642414.
@article{osti_1642414,
title = {Tailoring Solution-Processable Li Argyrodites Li6+xP1-xMxS5I (M = Ge, Sn) and Their Microstructural Evolution Revealed by Cryo-TEM for All-Solid-State Batteries},
author = {Song, Yong Bae and Kim, Dong Hyeon and Kwak, Hiram and Han, Daseul and Kang, Sujin and Lee, Jong Hoon and Bak, Seong-Min and Nam, Kyung-Wan and Lee, Hyun-Wook and Jung, Yoon Seok},
abstractNote = {Owing to their high Li+ conductivities, mechanical sinterability, and solution processability, sulfide Li argyrodites have attracted much attention as enablers in the development of high-performance all-solid-state batteries with practicability. However, solution-processable Li argyrodites have been developed only for a composition of Li6PS5X (X = Cl, Br, I) with insufficiently high Li+ conductivities (~10–4 S cm–1). In this work, we report the highest Li+ conductivity of 0.54 mS cm–1 at 30 °C (Li6.5P0.5Ge0.5S5I) for solution-processable iodine-based Li argyrodites. Furthermore, a comparative investigation of three iodine-based argyrodites of unsubstituted and Ge- and Sn-substituted solution-processed Li6PS5I with varied heat-treatment temperature elucidates the effect of microstructural evolution on Li+ conductivity. Notably, local nanostructures consisting of argyrodite nanocrystallites in solution-processed Li6.5P0.5Ge0.5S5I have been directly captured by cryogenic transmission electron microscopy, which is a first for sulfide solid electrolyte materials. Specifically, the promising electrochemical performances of all-solid-state batteries at 30 °C employing LiCoO2 electrodes tailored by the infiltration of Li6.5P0.5Ge0.5S5I–ethanol solutions are successfully demonstrated.},
doi = {10.1021/acs.nanolett.0c01028},
journal = {Nano Letters},
number = 6,
volume = 20,
place = {United States},
year = {Tue May 05 00:00:00 EDT 2020},
month = {Tue May 05 00:00:00 EDT 2020}
}

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