TY - JOUR
T1 - One-pot aprotic solvent-enabled synthesis of superionic Li-argyrodite solid electrolyte
AU - Heo, Young Jin
AU - Seo, Seung Deok
AU - Hwang, Suk Ho
AU - Choi, Sun Hee
AU - Kim, Dong Wan
N1 - Funding Information:
This work was supported by a Korea University Grant and the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science, ICT, and Future Planning [NRF‐2022R1A2C3003319 and 2018M3D1A1058744]. This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF‐2020R1A6A1A03045059).
Funding Information:
Ministry of Science, ICT, and Future Planning, Grant/Award Numbers: 2018M3D1A1058744, 2022R1A2C3003319; National Research Foundation of Korea; Korea University; Ministry of Education, Grant/Award Number: 2020R1A6A1A03045059 Funding information
Publisher Copyright:
© 2022 John Wiley & Sons Ltd.
PY - 2022/10/10
Y1 - 2022/10/10
N2 - Li-argyrodite phase Li6PS5Cl is a promising solid electrolyte (SE) with potential applications in all-solid-state batteries (ASSBs). Conventional SE synthesis methods such as high-energy ball-milling and solid-state synthesis require a significant amount of energy. Consequently, in recent years, several studies have been conducted on developing liquid phase methods for mass-producing SEs. One such liquid phase method uses tetrahydrofuran (THF, an aprotic solvent) and ethanol (EtOH, a protic solvent) to synthesize Li6PS5Cl. However, the synthesized SE contains impurities that are generated by reactions between EtOH and PS43−. In this study, we present a novel one-pot liquid phase method for synthesizing Li6PS5Cl using THF. The synthesized SE had a high ionic conductivity (2.03 mS·cm−1) and low electronic conductivity (7.44 × 10−8 S·cm−1). Notably, it had few impurities and was essentially composed of a single phase. Furthermore, an ASSB cell composed of LiNbO3-coated LiNi0.6Mn0.2CoO2 (NMC622)/Li6PS5Cl/Li-In, which contained the synthesized SE, exhibited a high discharge capacity of 156 mAh·g−1. Therefore, the liquid phase method proposed herein can be used to synthesize SEs, and can help realize mass production and commercialization.
AB - Li-argyrodite phase Li6PS5Cl is a promising solid electrolyte (SE) with potential applications in all-solid-state batteries (ASSBs). Conventional SE synthesis methods such as high-energy ball-milling and solid-state synthesis require a significant amount of energy. Consequently, in recent years, several studies have been conducted on developing liquid phase methods for mass-producing SEs. One such liquid phase method uses tetrahydrofuran (THF, an aprotic solvent) and ethanol (EtOH, a protic solvent) to synthesize Li6PS5Cl. However, the synthesized SE contains impurities that are generated by reactions between EtOH and PS43−. In this study, we present a novel one-pot liquid phase method for synthesizing Li6PS5Cl using THF. The synthesized SE had a high ionic conductivity (2.03 mS·cm−1) and low electronic conductivity (7.44 × 10−8 S·cm−1). Notably, it had few impurities and was essentially composed of a single phase. Furthermore, an ASSB cell composed of LiNbO3-coated LiNi0.6Mn0.2CoO2 (NMC622)/Li6PS5Cl/Li-In, which contained the synthesized SE, exhibited a high discharge capacity of 156 mAh·g−1. Therefore, the liquid phase method proposed herein can be used to synthesize SEs, and can help realize mass production and commercialization.
KW - Li-argyrodite
KW - all-solid-state lithium batteries
KW - liquid-phase synthesis
KW - one-pot process
KW - sulfide solid electrolyte
UR - http://www.scopus.com/inward/record.url?scp=85133172932&partnerID=8YFLogxK
U2 - 10.1002/er.8324
DO - 10.1002/er.8324
M3 - Article
AN - SCOPUS:85133172932
SN - 0363-907X
VL - 46
SP - 17644
EP - 17653
JO - International Journal of Energy Research
JF - International Journal of Energy Research
IS - 12
ER -