期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 23, 期 56, 页码 13950-13956出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201703116
关键词
all-solid-state; lithium-sulfur battery; solid sulfide electrolyte; sulfur-graphene composite
资金
- National Natural Science Foundation of China [51502263]
- Qianjiang Talents Plan D [QJD1602029]
- Zhejiang University
- Program for Innovative Research Team in University of Ministry of Education of China [IRT13037]
Herein an effective way for construction of all-solid-state lithium-sulfur batteries (LSBs) with sulfur/reduced graphene oxide (rGO) and Li9.54Si1.74P1.44S11.7Cl0.3 solid electrolyte is reported. In the composite cathode, the Li9.54Si1.74P1.44S11.7Cl0.3 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-Li9.54Si1.74P1.44S11.7Cl0.3 composite cathode exhibits a high specific capacity and good cycling stability. A high initial discharge capacity of 969 mAhg(-1) is achieved at a current density of 80 mAg(-1) at room temperature and the cell retains a reversible capacity of over 827 mAhg(-1) after 60 cycles. The enhanced performance is attributed to the intimate contact between the S/rGO and Li9.54Si1.74P1.44S11.7Cl0.3 electrolyte, and high electrical conductivity of rGO and high ionic conductivity of the solid electrolyte.
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