Journal
ELECTROCHIMICA ACTA
Volume 295, Issue -, Pages 444-451Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.08.107
Keywords
Lithium-sulfur batteries; Cathode material; Fe3O4/C; Fe-MOFs derived
Categories
Funding
- National Natural Science Foundation of China [21646012]
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology [2016DX08]
- China Postdoctoral Science Foundation [2016M600253, 2017T100246]
- Postdoctoral Foundation of Heilongjiang Province
- Fundamental Research Funds for the Central Universities
- NSRIF [201836]
Ask authors/readers for more resources
Li-S batteries have shown great potential for next generation energy storage due to the high theoretical specific capacity and low cost. However, the issues of shuttle effect of polysulfide, poor conductivity of sulfur, and volume expansion during lithiation/delithiation seriously restrict the development of Li-S batteries. Inspired by the strong chemical absorption between metal oxides and polysulfides, a jujube pit like Fe3O4/C composite derived from iron-based metal-organic framework (Fe-MOF) are applied as efficient sulfur host in Li-S batteries in this work. Benefitting from the strong chemical bond between iron ion and polysulfides, as well as the interaction between oxygen anion and lithium ion, the Fe3O4/C composite can immobilize the sulfur and inhibit the diffusion of polysulfides efficiently. In addition, the carbon component not only improves the electrical conductivity, but also serves as buffer layer to accommodate the volume variation upon charging/discharging. Consequently, such Fe3O4/C/S cathode shows a high initial specific capacity of 1324mAh/g at a current density of 0.05 C and could retain a specific capacity of 642mAh/g after 300 cycles at current density of 1 C, corresponding to a low fading rate of 0.072% per cycle. (C) 2018 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