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Biomass-Derived Oxygen and Nitrogen Co-Doped Porous Carbon with Hierarchical Architecture as Sulfur Hosts for High-Performance Lithium/Sulfur Batteries

1
International Academy of Optoelectronics at Zhaoqing, South China Normal University, Zhaoqing 526060; China
2
Synergy Innovation Institute of GDUT, Heyuan 517000, China
3
Peter the Great Saint-Petersburg Polytechnic University, Saint-Petersburg 195221, Russia
4
Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510631, China
*
Authors to whom correspondence should be addressed.
Nanomaterials 2017, 7(11), 402; https://doi.org/10.3390/nano7110402
Received: 2 October 2017 / Revised: 6 November 2017 / Accepted: 10 November 2017 / Published: 21 November 2017
In this work, a facile strategy to synthesize oxygen and nitrogen co-doped porous carbon (ONPC) is reported by one-step pyrolysis of waste coffee grounds. As-prepared ONPC possesses highly rich micro/mesopores as well as abundant oxygen and nitrogen co-doping, which is applied to sulfur hosts as lithium/sulfur batteries’ appropriate cathodes. In battery testing, the sulfur/oxygen and nitrogen co-doped porous carbon (S/ONPC) composite materials reveal a high initial capacity of 1150 mAh·g−1 as well as a reversible capacity of 613 mAh·g−1 after the 100th cycle at 0.2 C. Furthermore, when current density increases to 1 C, a discharge capacity of 331 mAh·g−1 is still attainable. Due to the hierarchical porous framework and oxygen/nitrogen co-doping, the S/ONPC composite exhibits a high utilization of sulfur and good electrochemical performance via the immobilization of the polysulfides through strong chemical binding. View Full-Text
Keywords: lithium/sulfur battery; composite cathode; hierarchically porous carbon; oxygen and nitrogen co-doping lithium/sulfur battery; composite cathode; hierarchically porous carbon; oxygen and nitrogen co-doping
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MDPI and ACS Style

Zhao, Y.; Wang, L.; Huang, L.; Maximov, M.Y.; Jin, M.; Zhang, Y.; Wang, X.; Zhou, G. Biomass-Derived Oxygen and Nitrogen Co-Doped Porous Carbon with Hierarchical Architecture as Sulfur Hosts for High-Performance Lithium/Sulfur Batteries. Nanomaterials 2017, 7, 402.

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