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- Title
Nitrogen-Doped Mesoporous Carbon: A Top-Down Strategy to Promote Sulfur Immobilization for Lithium-Sulfur Batteries.
- Authors
Zhao, Xiaohui; Liu, Ying; Manuel, James; Chauhan, Ghanshyam S.; Ahn, Hyo‐Jun; Kim, Ki‐Won; Cho, Kwon‐Koo; Ahn, Jou‐Hyeon
- Abstract
The loss of active sulfur material is a challenge in the application of lithium-sulfur (Li-S) batteries. To immobilize sulfur, a nitrogen-doped mesoporous carbon (PMC) was synthesized with polyaniline (PANi) as the carbon source, which was used for development of Li-S batteries. The nitrogen content and pore system of the PMCs were modulated by varying the pyrolysis temperature to impart good electrochemical properties to the Li-S cells. As a result, the optimal capacity reversibility was obtained with the PMC synthesized at 700 °C that consisted of 12.8 % nitrogen. The enhanced cycle performance of Li-S cells was also validated at high sulfur contents up to 70 % and high C-rates up to 2 C. Furthermore, such sulfur/PMC cathodes could alleviate volume expansion during the discharge process. The results suggest that our synthesized nitrogen-doped PMCs prepared by this top-down strategy are promising materials to immobilize active sulfur in Li-S batteries.
- Subjects
LITHIUM sulfur batteries; POLYANILINES; PYROLYSIS; MESOPOROUS materials; ELECTROCHEMICAL analysis
- Publication
ChemSusChem, 2015, Vol 8, Issue 19, p3234
- ISSN
1864-5631
- Publication type
Article
- DOI
10.1002/cssc.201500741