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Construction of All‐Solid‐State Batteries based on a Sulfur‐Graphene Composite and Li 9.54 Si 1.74 P 1.44 S 11.7 Cl 0.3 Solid Electrolyte
Author(s) -
Xu Ruochen,
Wu Zhang,
Zhang Shenzhao,
Wang Xiuli,
Xia Yan,
Xia Xinhui,
Huang Xiaohua,
Tu Jiangping
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201703116
Subject(s) - electrolyte , graphene , materials science , composite number , cathode , oxide , anode , ionic conductivity , chemical engineering , conductivity , fast ion conductor , lithium (medication) , composite material , nanotechnology , electrode , metallurgy , chemistry , medicine , endocrinology , engineering
Herein an effective way for construction of all‐solid‐state lithium‐sulfur batteries (LSBs) with sulfur/reduced graphene oxide (rGO) and Li 9.54 Si 1.74 P 1.44 S 11.7 Cl 0.3 solid electrolyte is reported. In the composite cathode, the Li 9.54 Si 1.74 P 1.44 S 11.7 Cl 0.3 powder is homogeneously mixed with the S/rGO composite to enhance the ionic conductivity. Coupled with a metallic Li anode and solid electrolyte, the designed S/rGO‐Li 9.54 Si 1.74 P 1.44 S 11.7 Cl 0.3 composite cathode exhibits a high specific capacity and good cycling stability. A high initial discharge capacity of 969 mAh g −1 is achieved at a current density of 80 mA g −1 at room temperature and the cell retains a reversible capacity of over 827 mAh g −1 after 60 cycles. The enhanced performance is attributed to the intimate contact between the S/rGO and Li 9.54 Si 1.74 P 1.44 S 11.7 Cl 0.3 electrolyte, and high electrical conductivity of rGO and high ionic conductivity of the solid electrolyte.