Journal
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
Volume 25, Issue 1, Pages 88-93Publisher
SPRINGER
DOI: 10.1007/s12613-018-1550-6
Keywords
graphene; Ni3S2 nanoflakes; sodium-ion battery; electrochemical performance
Categories
Funding
- Scientific and Technological Project of State Grid Corporation of China
Ask authors/readers for more resources
A binder-free Ni3S2 electrode was prepared directly on a graphene-coated Ni foam (G/Ni) substrate through surface sulfiding of substrate using thiourea as the sulfur source in this work. The Ni3S2 showed a flower-like morphology and was uniformly distributed on the G/Ni surface. The flower-like Ni3S2 was composed of cross-arrayed nanoflakes with a diameter and a thickness of 1-2 mu m and similar to 50 nm, respectively. The free space in the flowers and the thin feature of Ni3S2 buffered the volume changes and relieved mechanical strain during repeated cycling. The intimate contact with the Ni substrate and the fixing effect of graphene maintained the structural stability of the Ni3S2 electrode during cycling. The G/Ni-supported Ni3S2 maintained a reversible capacity of 250 mAh.g(-1) after 100 cycles at 50 mA.g(-1), demonstrating the good cycling stability as a result of the unique microstructure of this electrode material.
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