| 氧缺位结构介孔二氧化钛/聚乙烯复合隔膜在锂硫电池中的应用 |
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| 引用本文： | 吴桐,丛丽娜,孙立群,谢海明.氧缺位结构介孔二氧化钛/聚乙烯复合隔膜在锂硫电池中的应用[J].高等学校化学学报,2020,41(7):1661. |
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| 作者姓名： | 吴桐 丛丽娜 孙立群 谢海明 |
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| 作者单位： | 东北师范大学化学学院, 动力电池与地方联合工程实验室, 吉林省锂离子电池材料科技创新中心, 长春 130024 |
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| 基金项目： | 吉林省重点技术研发专项资金(2018201097GX);国家自然科学基金青年科学基金(21905041);国家自然科学基金青年科学基金(2018M640274);中国博士后科学基金(JJKH20190265KJ);吉林省教育厅自然科学基金(2412020ZD002);吉林省教育厅自然科学基金(2412018QD006);中央高校基础研究基金(2019C042) |
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| 摘 要： | 采用两步溶液法合成了一种具有高度氧缺位的黑色介孔二氧化钛, 并将其涂覆在隔膜表面作为锂硫电池复合隔膜, 研究了其在锂硫电池中的电化学性能. 结果表明, 氧缺位的黑色介孔二氧化钛材料不仅展现出良好的导电性, 还能加强对多硫化物的物理和化学吸附能力, 从而显著提高锂硫电池的放电比容量(0.1C倍率下首次放电比容量为1257 mA·h/g)和循环性能(循环100次后放电比容量为821 mA·h/g).
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| 关 键 词： | 锂硫电池 复合隔膜 二氧化钛 多硫化物 循环性能 |
| 收稿时间： | 2020-02-05 |
Application of Porous Black Titanium Dioxide with Oxygen Vacancy/Polyethylene as a Composite Separator for Lithium Sulfur Batteries† |
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| WU Tong,CONG Lina,SUN Liqun,XIE Haiming.Application of Porous Black Titanium Dioxide with Oxygen Vacancy/Polyethylene as a Composite Separator for Lithium Sulfur Batteries†[J].Chemical Research In Chinese Universities,2020,41(7):1661. |
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| Authors: | WU Tong CONG Lina SUN Liqun XIE Haiming |
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| Institution: | Faculty of Chemistry, National and Local United Engineering Laboratory for Power Batteries, Jilin Province Lithium Ion Battery Material Science and Technology Innovation Center, Northeast Normal University, Changchun 130024, China |
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| Abstract: | In this work, a mesoporous black titanium dioxide(b-TiO2) with highly ordered oxygen vacancy was synthesized by two-step solution method and coated on the surface of polyethylene separator to obtain the composite separator for lithium-sulfur(Li-S) battery. The electrochemical performance of the Li-S battery with this composite separator was studied. The results show that the mesoporous b-TiO2 presents a good conductivity due to oxygen vacancy, and can enhance the physical and chemical adsorption of polysulfide, thus the obtained Li-S batteries possess excellent discharge specific capacities(1257 mA·h/g at 0.1C) and outstan-ding cycling performance(discharge specific capacity 821 mA·h/g after 100 cycles). |
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| Keywords: | Lithium-sulfur battery Composite separator Titanium dioxide Polysulfide Cycling performance |
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