Journal
ENERGY STORAGE MATERIALS
Volume 23, Issue -, Pages 88-94Publisher
ELSEVIER
DOI: 10.1016/j.ensm.2019.05.027
Keywords
Lithium-organosulfur batteries; Polar materials; Graphene; Organosulfur host materials; Electrochemistry
Funding
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Science and Engineering [DE-SC0005397]
Ask authors/readers for more resources
The rapid capacity decay and unclear mechanism for the capacity fade limit the practical application of lithium-organosulfur batteries. Herein, we employ dimethyl trisulfide (DMTS) as a model compound to investigate the capacity fading mechanism and propose a solution to improve its cycling stability. Our results reveal that both DMTS and its discharge products (e.g., LiSCH3, LiSSCH3) are soluble in the electrolyte, leading to severe active material migration and loss, which becomes the predominant capacity fading mechanism. A three-dimensional nitrogen-doped graphene sponge decorated with Fe3O4 nanoparticles (3DFNG) is designed as a host for DMTS, which effectively confine the active material, enabling a specific capacity of 822 mA h g(-1) at C/10 rate and good cycling stability for 500 cycles with a capacity decay of as low as 0.09% per cycle. This work is expected to open up a promising direction to realize highly efficient hosts for lithium-organosulfur batteries.
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