| TiO2/CNTs复合材料涂覆隔膜的制备及在锂硫电池中的应用 |
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| 引用本文： | 官亦标,李万隆,谢潇怡,曲薇,沈进冉,傅凯,郭翠静,周淑琴,范红家,褚永金,陈人杰.TiO2/CNTs复合材料涂覆隔膜的制备及在锂硫电池中的应用[J].高等学校化学学报,2019,40(3):536. |
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| 作者姓名： | 官亦标 李万隆 谢潇怡 曲薇 沈进冉 傅凯 郭翠静 周淑琴 范红家 褚永金 陈人杰 |
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| 作者单位： | 新能源与储能运行控制国家重点实验室,北京100192;中国电力科学研究院有限公司,北京100192;环境科学与工程北京市重点实验室,北京理工大学材料科学与工程学院,北京100081;中国电力科学研究院有限公司,北京,100192;环境科学与工程北京市重点实验室,北京理工大学材料科学与工程学院,北京100081;北京电动车辆协同创新中心,北京100081 |
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| 基金项目： | 成果转化项目和北京市重点研发计划项目（批准号： Z181100004518001）资助． |
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| 摘 要： | 以金属有机框架材料MIL-125(Ti)为模板制备了多孔TiO2, 同时引入碳纳米管, 得到碳纳米管交联包覆多孔TiO2的三维导电复合材料. 将该复合材料涂覆在隔膜表面并应用于锂硫电池. 利用透射电子显微镜(TEM)、 扫描电子显微镜(SEM)和X射线光电子能谱仪(XPS)等对材料的结构和组成进行了表征. 电化学测试结果表明,在0.5C(1C=1675 mA/g)倍率下, CNTs/S复合正极材料表现出高达1051.1 mA·h/g的放电容量, 循环150周后仍可保持在904.8 mA·h/g. 在1C倍率下, 放电容量最高可达1036.9 mA·h/g, 循环250周后仍有763.0 mA·h/g, 展现出了良好的倍率性能和循环稳定性.
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| 关 键 词： | 锂硫电池 金属有机框架 化学吸附 |
| 收稿时间： | 2019-07-20 |
Preparation of TiO2/CNTs Composite Coated Separator and Its Application in Li-S Battery† |
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| GUAN Yibiao,LI Wanlong,XIE Xiaoyi,QU Wei,SHEN Jinran,FU Kai,GUO Cuijing,ZHOU Shuqin,FAN Hongjia,CHU Yongjin,CHEN Renjie.Preparation of TiO2/CNTs Composite Coated Separator and Its Application in Li-S Battery†[J].Chemical Research In Chinese Universities,2019,40(3):536. |
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| Authors: | GUAN Yibiao LI Wanlong XIE Xiaoyi QU Wei SHEN Jinran FU Kai GUO Cuijing ZHOU Shuqin FAN Hongjia CHU Yongjin CHEN Renjie |
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| Institution: | 1. State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems, Beijing 100192, China;2. China Electric Power Research Institute, Beijing 100192, China3. Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China;4. Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing 100081, China |
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| Abstract: | Porous TiO2 was prepared with metal-organic framework MIL-125(Ti) as template, and CNTs were introduced to form the three-dimensional conductive TiO2/CNTs composite. The TiO2/CNTs composite was coated on one side of the separator and applied in lithium-sulfur battery. The morphology and elemental composition of TiO2 were characterized by transmission electron microscopy(TEM), scanning electron microscopy(SEM) and X-ray photoelectron spectroscopy(XPS). The CNTs/S cathodes with TiO2/CNTs composite coated separator deliver a high initial discharge capacity of 1051.1 mA·h/g and still retain a capacity of 904.8 mA·h/g after 150 cycles at 0.5C. Even at 1C, the capacity is still up to 1036.9 mA·h/g, and a high capacity of 763.0 mA·h/g is retained after 250 cycles, showing good rate performance. |
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| Keywords: | Li-S battery Metal-organic framework Chemical adsorption |
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