Journal
CERAMICS INTERNATIONAL
Volume 46, Issue 11, Pages 18224-18233Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2020.04.145
Keywords
CoMn2O4; PPy; Lithium-sulfur batteries; Sulfur host; Cathode
Categories
Funding
- Natural Science Research Project for Universities in Anhui Province [KJ2018B14]
- Science and Technology Major Project of Anhui Province [18030901093]
- Key Research and Development Program of Wuhu [2019YF07]
Ask authors/readers for more resources
The polysulfide shuttle phenomenon in the cycling process of lithium-sulfur (Li-S) batteries restricts their practical applications. Herein, polypyrrole (PPy) coated hollow cobalt manganate (CoMn2O4) dodecahedrons were prepared via template method, which combines the advantages of manganese-based metal oxide and conductive polymer effectively. The CoMn2O4 as bimetal oxides can trap the intermediate products and inhibit the dissolution of short chain polysulfides in the organic electrolyte. Moreover, the hollow dodecahedron structure provides enough space to alleviate volume change in the cycle process. Furthermore, the conductive PPy layer can enhance the conductivity of nanocomposite and suppress the shuttle effect in the electrolyte. The initial capacity of CoMn2O4/S@PPy cathode reaches up to 1407 mA h g(-1) at 0.1 A g(-1). The capacity retained ca.736 mA h g(-1) at 0.1 A g(-1) for 150 cycles and 659 mA h g(-1) at 0.5 A g(-1) when cycled 500 times, respectively, along with the Coulombic efficiency was over 99%. Owing to these outstanding electrochemical performances, the as-prepared nanocomposite is promising to be a superior sulfur host in the field of Li-S 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