Biomass-Derived Oxygen and Nitrogen Co-Doped Porous Carbon with Hierarchical Architecture as Sulfur Hosts for High-Performance Lithium/Sulfur Batteries
Yan Zhao,
Li Wang,
Lanyan Huang,
Maxim. Yu. Maximov,
Mingliang Jin,
Yongguang Zhang,
Xin Wang,
Guofu Zhou
Affiliations
Yan Zhao
International Academy of Optoelectronics at Zhaoqing, South China Normal University, Zhaoqing 526060; China
Li Wang
Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510631, China
Lanyan Huang
International Academy of Optoelectronics at Zhaoqing, South China Normal University, Zhaoqing 526060; China
Maxim. Yu. Maximov
Peter the Great Saint-Petersburg Polytechnic University, Saint-Petersburg 195221, Russia
Mingliang Jin
International Academy of Optoelectronics at Zhaoqing, South China Normal University, Zhaoqing 526060; China
Yongguang Zhang
International Academy of Optoelectronics at Zhaoqing, South China Normal University, Zhaoqing 526060; China
Xin Wang
International Academy of Optoelectronics at Zhaoqing, South China Normal University, Zhaoqing 526060; China
Guofu Zhou
International Academy of Optoelectronics at Zhaoqing, South China Normal University, Zhaoqing 526060; China
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.
