Journal
ELECTROCHIMICA ACTA
Volume 145, Issue -, Pages 193-200Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.08.049
Keywords
Copper sulphide; Reduced graphene oxide; Hybrid; Lithium ion batteries; Anode
Categories
Funding
- National Natural Science Foundation of China [51342010]
- Science and Technology Department of Science and Technology Project in Jiangsu Province [BY2014037-31]
Ask authors/readers for more resources
The CuS@reduced graphene oxide (CSG) was synthesized and used as an anode material in lithium ion batteries (LIBs). CuS nanoparticles were homogeneously dispersed on the surfaces of reduced graphene oxide (rGO) nanosheets via a hydrothermal method. The rGO nanosheets in the CSG hydrids can improve the electrical conductivity and structure stability of CSG. The LIB with a CSG anode displays excellent performance, with a first discharge capacity up to 851 mAh/g, a reversible capacity of 648.1 mAh/g in the initial cycle, and an enhanced cyclic performance with a discharge capacity of 710.7 mAh/g at the 100th cycle, which corresponds to 114.3% of the theoretical value of CSG and 83.5% of the first discharge capacity accompanied by an excellent Coulombic efficiency of 99.1% at a current density of 0.2 C, which is much larger than (close to 4.5 times) that with a pure CuS anode at the 100th cycle (159.7 mAh/g). This phenomenon can be attributed to the synergistic action of CuS nanoparticles and rGO nanosheets in the double-sandwich-like CSG hybrids. These results indicate that CSG is an excellent anode material and has promising prospects in lithium ion batteries applications. (C) 2014 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available