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Title: Interface stability of LiCl-rich argyrodite Li6PS5Cl with propylene carbonate boosts high-performance lithium batteries

Journal Article · · Electrochimica Acta
 [1];  [1];  [1];  [1];  [2];  [3];  [4];  [1];  [5]
  1. Univ. of Louisville, KY (United States). Conn Center for Renewable Energy Research
  2. Univ. of Louisville, KY (United States). Conn Center for Renewable Energy Research; Univ. of Louisville, KY (United States). Dept. of Physics and Astronomy
  3. Univ. of Louisville, KY (United States). Conn Center for Renewable Energy Research; Univ. of Louisville, KY (United States). Dept. of Chemical Engineering
  4. Univ. of Louisville, KY (United States). Dept. of Mechanical Engineering
  5. Univ. of Louisville, KY (United States). Conn Center for Renewable Energy Research; Univ. of Louisville, KY (United States). Dept. of Mechanical Engineering
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In solid-state lithium (Li)-metal batteries (SSLMBs), sulfide-based Li-ion conductors represent one of the most popular solid electrolytes (SEs). However, the development of sulfide-based SSLMBs is significantly hampered by interfacial issues including large solid-solid contact resistance and serious side reactions at the SE/electrode interface. To address these issues, here, we demonstrated a simple and efficient strategy by using LiCl-rich argyrodite Li6PS5Cl (Li6PS5Cl-LiCl) SE and trace amount of propylene carbonate (PC) at the SE/electrode interface to facilitate the formation of stable and robust solid electrolyte interphase (SEI). Additionally, the formed SEI not only serves as a buffer layer to passivate the interfacial reactions and suppress Li dendrite growth, but also acts as a bridge for Li-ion conduction to reduce the contact resistance. As a result, the Li||Li symmetric cell exhibited long-term electrochemical cycling stability over 1000 h at a current density of 0.2 mA cm-2. Furthermore, the assembled Li||Li4Ti5O12 (LTO) batteries delivered a specific capacity of 175 mAh g–1 at 0.2 C, and remained an excellent specific capacity of 116 mAh g–1 after 200 cycles at a high current rate of 1 C. These features indicate a feasible strategy to enhance the interfacial property of high-performance SSLMBs.

Research Organization:
Univ. of Louisville, KY (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office; National Aeronautics and Space Administration (NASA); USDOE
Grant/Contract Number:
EE0008866; NNX15AR69H
OSTI ID:
1848920
Alternate ID(s):
OSTI ID: 1775728
Journal Information:
Electrochimica Acta, Vol. 363, Issue C; ISSN 0013-4686
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
25 ENERGY STORAGE
Electrochemistry
Li6PS5Cl
Argyrodite electrolyte
LiCl-rich
Interface
Lithium battery