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2H‐MoS 2 as an Artificial Solid Electrolyte Interface in All‐Solid‐State Lithium–Sulfur Batteries
Author(s) -
Kızılaslan Abdulkadir,
Çetinkaya Tuğrul,
Akbulut Hatem
Publication year - 2020
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.202001020
Subject(s) - electrolyte , anode , materials science , electrochemistry , lithium (medication) , electrode , chronoamperometry , chemical engineering , ionic conductivity , half cell , inorganic chemistry , fast ion conductor , working electrode , chemistry , cyclic voltammetry , medicine , engineering , endocrinology
All‐solid‐state lithium‐ion batteries are considered the next‐generation energy storage systems. However, certain problems arise from the degradation of anode–electrolyte interface hindering their use especially when lithium is used as an anode. Herein, lithium metal anode surface is modified by an artificial 2H‐MoS 2 layer to prevent the contact between highly reactive lithium and solid electrolyte without sacrificing the lithium ion transport. The stabilization of the electrode/electrolyte interface is attributed to the electrochemical stability of the 2H‐MoS 2 layer. Besides, high ionic conductivity and selective sieving nature of layered MoS 2 neither prevents the electrochemical reactions nor increases the total impedance of the cell. Electrochemical stability of the electrode/electrolyte interface is shown by long‐term chronoamperometry and chronovoltammetry tests. By stabilizing electrode/electrolyte interface, initial and final discharge capacities of 675.8 and 584.1 mAh g −1 , respectively, is obtained at 0.4 mA cm −2 current density in MoS 2 @Li/Li 7 P 3 S 11 /S. After 200 cycles, discharge capacity fade is obtained as 13.58% and 27.3% for the cells assembled with MoS 2 @Li and bare Li anodes, respectively.