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Title: Strong Lithium Polysulfide Chemisorption on Electroactive Sites of Nitrogen-Doped Carbon Composites For High-Performance Lithium–Sulfur Battery Cathodes

Abstract

Despite the high theoretical capacity of lithium–sulfur batteries, their practical applications are severely hindered by a fast capacity decay, stemming from the dissolution and diffusion of lithium polysulfides in the electrolyte. A novel functional carbon composite (carbon-nanotube-interpenetrated mesoporous nitrogen-doped carbon spheres, MNCS/CNT), which can strongly adsorb lithium polysulfides, is now reported to act as a sulfur host. The nitrogen functional groups of this composite enable the effective trapping of lithium polysulfides on electroactive sites within the cathode, leading to a much improved electrochemical performance (1200 mAh g -1 after 200 cycles). The enhancement in adsorption can be attributed to the chemical bonding of lithium ions by nitrogen functional groups in the MNCS/CNT framework. Furthermore, the micrometer-sized spherical structure of the material yields a high areal capacity (ca. 6 mAh cm -2) with a high sulfur loading of approximately 5 mg cm -2, which is ideal for practical applications of the lithium–sulfur batteries.

Authors:
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Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE) - Office of FreedomCar and Vehicle Technologies
OSTI Identifier:
1244990
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Angewandte Chemie (International Edition); Journal Volume: 54; Journal Issue: 14
Country of Publication:
United States
Language:
English
Subject:
carbon materials; chemisorption; doping; electrochemistry; lithium–sulfur batteries

Citation Formats

Song, Jiangxuan, Gordin, Mikhail, Xu, Terrence, Chen, Shuru, Yu, Zhaoxin, Sohn, Hiesang, Lu, Jun, Ren, Yang, Duan, Yuhua, and wang, Donghai. Strong Lithium Polysulfide Chemisorption on Electroactive Sites of Nitrogen-Doped Carbon Composites For High-Performance Lithium–Sulfur Battery Cathodes. United States: N. p., 2015. Web. doi:10.1002/anie.201411109.
Song, Jiangxuan, Gordin, Mikhail, Xu, Terrence, Chen, Shuru, Yu, Zhaoxin, Sohn, Hiesang, Lu, Jun, Ren, Yang, Duan, Yuhua, & wang, Donghai. Strong Lithium Polysulfide Chemisorption on Electroactive Sites of Nitrogen-Doped Carbon Composites For High-Performance Lithium–Sulfur Battery Cathodes. United States. doi:10.1002/anie.201411109.
Song, Jiangxuan, Gordin, Mikhail, Xu, Terrence, Chen, Shuru, Yu, Zhaoxin, Sohn, Hiesang, Lu, Jun, Ren, Yang, Duan, Yuhua, and wang, Donghai. Fri . "Strong Lithium Polysulfide Chemisorption on Electroactive Sites of Nitrogen-Doped Carbon Composites For High-Performance Lithium–Sulfur Battery Cathodes". United States. doi:10.1002/anie.201411109.
@article{osti_1244990,
title = {Strong Lithium Polysulfide Chemisorption on Electroactive Sites of Nitrogen-Doped Carbon Composites For High-Performance Lithium–Sulfur Battery Cathodes},
author = {Song, Jiangxuan and Gordin, Mikhail and Xu, Terrence and Chen, Shuru and Yu, Zhaoxin and Sohn, Hiesang and Lu, Jun and Ren, Yang and Duan, Yuhua and wang, Donghai},
abstractNote = {Despite the high theoretical capacity of lithium–sulfur batteries, their practical applications are severely hindered by a fast capacity decay, stemming from the dissolution and diffusion of lithium polysulfides in the electrolyte. A novel functional carbon composite (carbon-nanotube-interpenetrated mesoporous nitrogen-doped carbon spheres, MNCS/CNT), which can strongly adsorb lithium polysulfides, is now reported to act as a sulfur host. The nitrogen functional groups of this composite enable the effective trapping of lithium polysulfides on electroactive sites within the cathode, leading to a much improved electrochemical performance (1200 mAh g-1 after 200 cycles). The enhancement in adsorption can be attributed to the chemical bonding of lithium ions by nitrogen functional groups in the MNCS/CNT framework. Furthermore, the micrometer-sized spherical structure of the material yields a high areal capacity (ca. 6 mAh cm-2) with a high sulfur loading of approximately 5 mg cm-2, which is ideal for practical applications of the lithium–sulfur batteries.},
doi = {10.1002/anie.201411109},
journal = {Angewandte Chemie (International Edition)},
number = 14,
volume = 54,
place = {United States},
year = {Fri Mar 27 00:00:00 EDT 2015},
month = {Fri Mar 27 00:00:00 EDT 2015}
}