Macroporous Activated Carbon Derived from Rapeseed Shell for Lithium–Sulfur Batteries
Lithium–sulfur batteries have drawn considerable attention because of their extremely high energy density. Activated carbon (AC) is an ideal matrix for sulfur because of its high specific surface area, large pore volume, small-size nanopores, and simple preparation. In this work, through KOH activat...
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MDPI AG
2017-10-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/7/10/1036 |
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| author | Mingbo Zheng Qin Hu Songtao Zhang Hao Tang Lulu Li Huan Pang |
| author_facet | Mingbo Zheng Qin Hu Songtao Zhang Hao Tang Lulu Li Huan Pang |
| author_sort | Mingbo Zheng |
| collection | DOAJ |
| description | Lithium–sulfur batteries have drawn considerable attention because of their extremely high energy density. Activated carbon (AC) is an ideal matrix for sulfur because of its high specific surface area, large pore volume, small-size nanopores, and simple preparation. In this work, through KOH activation, AC materials with different porous structure parameters were prepared using waste rapeseed shells as precursors. Effects of KOH amount, activated temperature, and activated time on pore structure parameters of ACs were studied. AC sample with optimal pore structure parameters was investigated as sulfur host materials. Applied in lithium–sulfur batteries, the AC/S composite (60 wt % sulfur) exhibited a high specific capacity of 1065 mAh g−1 at 200 mA g−1 and a good capacity retention of 49% after 1000 cycles at 1600 mA g−1. The key factor for good cycling stability involves the restraining effect of small-sized nanopores of the AC framework on the diffusion of polysulfides to bulk electrolyte and the loss of the active material sulfur. Results demonstrated that AC materials derived from rapeseed shells are promising materials for sulfur loading. |
| first_indexed | 2024-12-11T22:14:22Z |
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| id | doaj.art-36d717b10d8843898c8848d74a580de3 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-11T22:14:22Z |
| publishDate | 2017-10-01 |
| publisher | MDPI AG |
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| spelling | doaj.art-36d717b10d8843898c8848d74a580de32022-12-22T00:48:38ZengMDPI AGApplied Sciences2076-34172017-10-01710103610.3390/app7101036app7101036Macroporous Activated Carbon Derived from Rapeseed Shell for Lithium–Sulfur BatteriesMingbo Zheng0Qin Hu1Songtao Zhang2Hao Tang3Lulu Li4Huan Pang5School of Chemistry and Chemical Engineering, Institute for Innovative Materials and Energy, Yangzhou University, Yangzhou 225009, Jiangsu, ChinaSchool of Chemistry and Chemical Engineering, Institute for Innovative Materials and Energy, Yangzhou University, Yangzhou 225009, Jiangsu, ChinaSchool of Chemistry and Chemical Engineering, Institute for Innovative Materials and Energy, Yangzhou University, Yangzhou 225009, Jiangsu, ChinaSchool of Chemistry and Chemical Engineering, Institute for Innovative Materials and Energy, Yangzhou University, Yangzhou 225009, Jiangsu, ChinaSchool of Chemistry and Chemical Engineering, Institute for Innovative Materials and Energy, Yangzhou University, Yangzhou 225009, Jiangsu, ChinaSchool of Chemistry and Chemical Engineering, Institute for Innovative Materials and Energy, Yangzhou University, Yangzhou 225009, Jiangsu, ChinaLithium–sulfur batteries have drawn considerable attention because of their extremely high energy density. Activated carbon (AC) is an ideal matrix for sulfur because of its high specific surface area, large pore volume, small-size nanopores, and simple preparation. In this work, through KOH activation, AC materials with different porous structure parameters were prepared using waste rapeseed shells as precursors. Effects of KOH amount, activated temperature, and activated time on pore structure parameters of ACs were studied. AC sample with optimal pore structure parameters was investigated as sulfur host materials. Applied in lithium–sulfur batteries, the AC/S composite (60 wt % sulfur) exhibited a high specific capacity of 1065 mAh g−1 at 200 mA g−1 and a good capacity retention of 49% after 1000 cycles at 1600 mA g−1. The key factor for good cycling stability involves the restraining effect of small-sized nanopores of the AC framework on the diffusion of polysulfides to bulk electrolyte and the loss of the active material sulfur. Results demonstrated that AC materials derived from rapeseed shells are promising materials for sulfur loading.https://www.mdpi.com/2076-3417/7/10/1036biomassactivated carbonsulfur hostslithium–sulfur battery |
| spellingShingle | Mingbo Zheng Qin Hu Songtao Zhang Hao Tang Lulu Li Huan Pang Macroporous Activated Carbon Derived from Rapeseed Shell for Lithium–Sulfur Batteries Applied Sciences biomass activated carbon sulfur hosts lithium–sulfur battery |
| title | Macroporous Activated Carbon Derived from Rapeseed Shell for Lithium–Sulfur Batteries |
| title_full | Macroporous Activated Carbon Derived from Rapeseed Shell for Lithium–Sulfur Batteries |
| title_fullStr | Macroporous Activated Carbon Derived from Rapeseed Shell for Lithium–Sulfur Batteries |
| title_full_unstemmed | Macroporous Activated Carbon Derived from Rapeseed Shell for Lithium–Sulfur Batteries |
| title_short | Macroporous Activated Carbon Derived from Rapeseed Shell for Lithium–Sulfur Batteries |
| title_sort | macroporous activated carbon derived from rapeseed shell for lithium sulfur batteries |
| topic | biomass activated carbon sulfur hosts lithium–sulfur battery |
| url | https://www.mdpi.com/2076-3417/7/10/1036 |
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