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| Preparation and Lithium-Storage Performance of In-Situ Nitrogen Doped Porous Carbon/Sulfur Composite Cathodes Derived from Passiflora Edulis Peel |
| Author Name | Affiliation | E-mail | | LEI Dong-Yuan | National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, Yunnan Minzu University, Kunming 650500, China
Key Laboratory of Green-Chemical Materials in University of Yunnan Province, Yunnan Minzu University, Kunming 650500, China | | | LI Yu-Yun | National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, Yunnan Minzu University, Kunming 650500, China
Key Laboratory of Green-Chemical Materials in University of Yunnan Province, Yunnan Minzu University, Kunming 650500, China | | | ZHAO Zi-Rui | National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, Yunnan Minzu University, Kunming 650500, China
Key Laboratory of Green-Chemical Materials in University of Yunnan Province, Yunnan Minzu University, Kunming 650500, China | | | DUAN Jian-Xiang | National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, Yunnan Minzu University, Kunming 650500, China
Key Laboratory of Green-Chemical Materials in University of Yunnan Province, Yunnan Minzu University, Kunming 650500, China | | | LI Hong | National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, Yunnan Minzu University, Kunming 650500, China
Key Laboratory of Green-Chemical Materials in University of Yunnan Province, Yunnan Minzu University, Kunming 650500, China | | | XIANG Ming-Wu | National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, Yunnan Minzu University, Kunming 650500, China
Key Laboratory of Green-Chemical Materials in University of Yunnan Province, Yunnan Minzu University, Kunming 650500, China | xmwbboy@163.com | | GUO Jun-Ming | National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, Yunnan Minzu University, Kunming 650500, China
Key Laboratory of Green-Chemical Materials in University of Yunnan Province, Yunnan Minzu University, Kunming 650500, China | guojunming@tsinghua.org.cn |
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| Abstract: An in-situ nitrogen-doped hierarchical porous carbon material was prepared via a simultaneous activation/carbonization process using biomass passiflora edulis peel and KHCO3 as carbon source and activator, respectively. The as-prepared porous carbon was composited with elemental sulfur to obtain the porous carbon/sulfur cathode material. The phase composition, microstructure, specific surface area, and pore structure of the as-prepared materials were investigated by these characterization techniques including X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and so on. Also, the adsorption effect of polysulfides using porous carbon as an adsorbing material was studied by UV-Vis absorption spectroscopy. The electrochemical performances of porous carbon/sulfur composite cathodes with different sulfur content from 60% to 80% were studied by galvanostatic charge/discharge test. Results showed that the asprepared material was amorphous porous carbon with a high specific surface area of 1 093 m2·g-1 and pore volume of 0.63 cm3·g-1. The physicochemical synergistic adsorption of polysulfides through abundant porous structure and in-situ nitrogen doping effectively suppresses the "shuttle effect" of lithium-sulfur batteries, whilst improving the discharge capacity and cycle performance. Consequently, the porous carbon/sulfur composite cathode with a sulfur content of 60% delivered high initial discharge capacities of 1 057.7 and 763.4 mAh·g-1 at 0.05C and 0.2C, respectively. At a high current rate of 1C, a long life of 300 cycles with a capacity retention rate of 75% can be achieved. |
| Keywords: lithium-sulfur batteries biomass passiflora edulis peel carbon/sulfur composites hierarchical porous structure |
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| LEI Dong-Yuan,LI Yu-Yun,ZHAO Zi-Rui,DUAN Jian-Xiang,LI Hong,XIANG Ming-Wu,GUO Jun-Ming.Preparation and Lithium-Storage Performance of In-Situ Nitrogen Doped Porous Carbon/Sulfur Composite Cathodes Derived from Passiflora Edulis Peel[J].Chinese Journal of Inorganic Chemistry,2022,38(5):873-883. |
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