| CoO/SnO2@NC/S复合材料的制备及其应用于高稳定性锂硫电池正极材料 |
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| 引用本文： | Meng-ting Duan,Meng-rong Wu,Kai Xue,Zheng-xu Bian,Jing Shi,Xing-mei Guo,Fu Cao,Jun-hao Zhang,Qing-hong Kong,Feng Zhang. CoO/SnO2@NC/S复合材料的制备及其应用于高稳定性锂硫电池正极材料[J]. 矿物冶金与材料学报, 2021, 28(10): 1647-1655. DOI: 10.1007/s12613-021-2315-1 |
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| 作者姓名： | Meng-ting Duan Meng-rong Wu Kai Xue Zheng-xu Bian Jing Shi Xing-mei Guo Fu Cao Jun-hao Zhang Qing-hong Kong Feng Zhang |
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| 作者单位： | 1)School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China |
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| 摘 要： | To improve the sulfur loading capacity of lithium-sulfur batteries (Li–S batteries) cathode and avoid the inevitable “shuttle effect”, hollow N doped carbon coated CoO/SnO2 (CoO/SnO2@NC) composite has been designed and prepared by a hydrothermal-calcination method. The specific surface area of CoO/SnO2@NC composite is 85.464 m2·g–1, and the pore volume is 0.1189 cm3·g–1. The hollow core-shell structure as a carrier has a sulfur loading amount of 66.10%. The initial specific capacity of the assembled Li–S batteries is 395.7 mAh·g–1 at 0.2 C, which maintains 302.7 mAh·g–1 after 400 cycles. When the rate increases to 2.5 C, the specific capacity still has 221.2 mAh·g–1. The excellent lithium storage performance is attributed to the core-shell structure with high specific surface area and porosity. This structure effectively increases the sulfur loading, enhances the chemical adsorption of lithium polysulfides, and reduces direct contact between CoO/SnO2 and the electrolyte.
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| 关 键 词： | ; ; ; |
Preparation of CoO/SnO2@NC/S composite as high-stability cathode material for lithium-sulfur batteries |
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| Meng-ting Duan,Meng-rong Wu,Kai Xue,Zheng-xu Bian,Jing Shi,Xing-mei Guo,Fu Cao,Jun-hao Zhang,Qing-hong Kong,Feng Zhang. Preparation of CoO/SnO2@NC/S composite as high-stability cathode material for lithium-sulfur batteries[J]. International Journal of Minerals,Metallurgy and Materials, 2021, 28(10): 1647-1655. DOI: 10.1007/s12613-021-2315-1 |
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| Authors: | Meng-ting Duan Meng-rong Wu Kai Xue Zheng-xu Bian Jing Shi Xing-mei Guo Fu Cao Jun-hao Zhang Qing-hong Kong Feng Zhang |
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| Abstract: | To improve the sulfur loading capacity of lithium-sulfur batteries (Li–S batteries) cathode and avoid the inevitable "shuttle effect", hollow N doped carbon coated CoO/SnO2 (CoO/SnO2@NC) composite has been designed and prepared by a hydrothermal-calcination meth-od. The specific surface area of CoO/SnO2@NC composite is 85.464 m2·g–1, and the pore volume is 0.1189 cm3·g–1. The hollow core-shell structure as a carrier has a sulfur loading amount of 66.10%. The initial specific capacity of the assembled Li–S batteries is 395.7 mAh·g–1 at 0.2 C, which maintains 302.7 mAh·g–1 after 400 cycles. When the rate increases to 2.5 C, the specific capacity still has 221.2 mAh·g–1. The ex-cellent lithium storage performance is attributed to the core-shell structure with high specific surface area and porosity. This structure effect-ively increases the sulfur loading, enhances the chemical adsorption of lithium polysulfides, and reduces direct contact between CoO/SnO2 and the electrolyte. |
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| Keywords: | hydrothermal-calcination method CoO/SnO2@NC composite lithium-sulfur battery cycling stability |
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