Exploring hierarchical FeS2/C composite nanotubes arrays as advanced cathode for lithium ion batteries
Abstract
Rational construction of advanced FeS2 cathode is one of research hotspots, and of great importance for developing high-performance lithium ion batteries (LIBs). Herein we report a facile hydrolysis-sulfurization method for fabrication of FeS2/C nanotubes arrays with the help of sacrificial Co2(OH)2CO3 nanowires template and glucose carbonization. Self-supported FeS2/C nanotubes consist of interconnected nanoburrs of 5-20 nm, and show hierarchical porous structure. The FeS2/C nanotubes arrays are demonstrated with enhanced cycling life and noticeable high-rate capability with capacities ranging from 735 mAh g-1 at 0.25 C to 482 mAh g-1 at 1.5 C, superior to those FeS2 counterparts in the literature. The composite nanotubes arrays architecture plays positive roles in the electrochemical enhancement due to combined advantages of large electrode-electrolyte contact area, good strain accommodation, improved electrical conductivity, and enhanced structural stability.
- Publication:
-
Journal of Power Sources
- Pub Date:
- November 2016
- DOI:
- 10.1016/j.jpowsour.2016.09.126
- Bibcode:
- 2016JPS...332..383P
- Keywords:
-
- Pyrite;
- Li ion batteries;
- Nanotubes arrays;
- Cathode;
- Composite