Nitrogen-Doped Mesoporous Carbon: A Top-Down Strategy to Promote Sulfur Immobilization for Lithium-Sulfur Batteries.
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.
Department of Chemical Engineering and Research Institute for Green Energy Convergence Technology, Gyeongsang National University, 501 Jinju-daero, Jinju, 660-701, Republic of Korea.
Xiaohui
X
Zhao
Department of Chemical Engineering and Research Institute for Green Energy Convergence Technology, Gyeongsang National University, 501 Jinju-daero, Jinju, 660-701, Republic of Korea.
Ying
Y
Liu
Department of Chemical Engineering and Research Institute for Green Energy Convergence Technology, Gyeongsang National University, 501 Jinju-daero, Jinju, 660-701, Republic of Korea.
James
J
Manuel
Department of Chemical Engineering and Research Institute for Green Energy Convergence Technology, Gyeongsang National University, 501 Jinju-daero, Jinju, 660-701, Republic of Korea.
Ghanshyam S
GS
Chauhan
Department of Materials Engineering and Convergence Technology and RIGET, Gyeongsang National University, 501 Jinju-daero, Jinju, 660-701, Republic of Korea.
Hyo-Jun
HJ
Ahn
Department of Materials Engineering and Convergence Technology and RIGET, Gyeongsang National University, 501 Jinju-daero, Jinju, 660-701, Republic of Korea.
Ki-Won
KW
Kim
Department of Materials Engineering and Convergence Technology and RIGET, Gyeongsang National University, 501 Jinju-daero, Jinju, 660-701, Republic of Korea.
Kwon-Koo
KK
Cho
Department of Chemical Engineering and Research Institute for Green Energy Convergence Technology, Gyeongsang National University, 501 Jinju-daero, Jinju, 660-701, Republic of Korea. jhahn@gnu.ac.kr.|Department of Materials Engineering and Convergence Technology and RIGET, Gyeongsang National University, 501 Jinju-daero, Jinju, 660-701, Republic of Korea. jhahn@gnu.ac.kr.
Jou-Hyeon
JH
Ahn
D000814:Aniline Compounds / Q000737:chemistry; D011211:Electric Power Supplies; D004566:Electrodes; D008094:Lithium / Q000737:chemistry*; D009584:Nitrogen / Q000737:chemistry*; D016062:Porosity; D013455:Sulfur / Q000737:chemistry*
D000814:Aniline Compounds; C416807:polyaniline; D013455:Sulfur; D008094:Lithium; D009584:Nitrogen
carbon; doping; electrochemistry; mesoporous materials; sulfur