Journal
ELECTROCHIMICA ACTA
Volume 339, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2020.135938
Keywords
Ni3S2; CNTs; Anode; Integral conductive networks; Sodium ion batteries
Categories
Funding
- National Natural Science Foundation of China [51572078, 51772086, 51872087, 51971089]
- National Science Foundation of Hunan Province [2018JJ2038]
- Student National SIT Innovation Program
Ask authors/readers for more resources
A novel porous micro-nanostructure based on nickel disulfide (Ni3S2) nanoparticles interconnected with carbon nanotubes (CNTs) has been synthesized through a facile vulcanization with sulphur in the Ar + H-2 (5%) atmosphere at 550 degrees C. The superior structural integrity of the Ni3S2/CNTs composites with abundant mesopores can be controlled by adjusting the amount of CNTs. The CNTs not only homogenously embed into every micro-nanostructure but also bridge between micro-nanostructures to form excellent integral conductive network. In the electrode, every Ni3S2/CNTs unit has a micro-nanostructure, resulting in fast transportation of ions and electrons. The experimental proofs reveal that the stable solid electrolyte interphase films on the outer surface of micro-nanostructures can assure the high columbic efficiencies and prevent the polysulfides shuttle effect, which plays an important role in the excellent cycling performance. The charge capacity retention of the Ni3S2/CNTs-10 electrode is up to 82.2% after 200 cycles at the current density of 0.5 A g(-1). It shows a high initial coulombic efficiency (up to 83.2%) and stable voltage platforms at different current densities, suggesting that the Ni3S2/CNTs micro-nanostructure is a promising applicable anode candidate for sodium ion batteries. (C) 2020 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