| 基于氧化石墨烯的锂硫电池用聚乙烯隔膜的改性 |
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| 引用本文： | 曹小倩,王新威,王新灵,郑震. 基于氧化石墨烯的锂硫电池用聚乙烯隔膜的改性[J]. 医学教育探索, 2017, 30(3): 341-346 |
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| 作者姓名： | 曹小倩 王新威 王新灵 郑震 |
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| 作者单位： | 上海交通大学化学化工学院, 上海 200240,上海化工研究院, 上海 200062,上海交通大学化学化工学院, 上海 200240,上海交通大学化学化工学院, 上海 200240 |
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| 基金项目： | 上海市经济和信息化委员会军民结合专项（JMJH2014018）。 |
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| 摘 要： | 通过简单刮涂法制备了氧化石墨烯（GO）涂覆改性的聚乙烯（PE）隔膜,并分析研究了GO的氧化程度对隔膜电学性能的影响。采用X射线光电子能谱分析（XPS）、扫描电子显微镜（SEM）、充放电实验、多硫化物透过性测试和交流阻抗等方法对GO及其改性隔膜的结构和性能进行了研究。结果表明：GO改性隔膜可以抑制锂硫电池的"穿梭效应";并且既具有较高的氧化程度,又具有较高的导电性的GO-4改性隔膜的电学性能最优;引入该隔膜的锂硫电池在0.2 C条件下,首圈放电比容量为900.0 mA·h/g,高于未改性PE隔膜的763.2 mA·h/g。
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| 关 键 词： | 锂硫电池 聚乙烯隔膜 氧化石墨烯 |
| 收稿时间： | 2017-01-23 |
Modification of Polyethylene Separators Based on Graphene Oxide in Lithium-Sulfur Batteries |
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| CAO Xiao-qian,WANG Xin-wei,WANG Xin-ling and ZHENG Zhen. Modification of Polyethylene Separators Based on Graphene Oxide in Lithium-Sulfur Batteries[J]. Researches in Medical Education, 2017, 30(3): 341-346 |
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| Authors: | CAO Xiao-qian WANG Xin-wei WANG Xin-ling ZHENG Zhen |
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| Affiliation: | School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China,Shanghai Research Institute of Chemical Industry, Shanghai 200062, China,School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China and School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China |
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| Abstract: | Graphene oxide (GO) coated polyethylene (PE) separator was successfully prepared by a quadruple film applicator and the effect of the oxidation degree of GO on performances of lithium-sulfur batteries was studied. The structures of GO were characterized by XPS. The properties of GO coated separator were investigated by SEM, A.C. impedance, polysulfide permeability test and charge-discharge experiments. Results revealed that GO coated separator could prohibit the "shuttle effect" of lithium-sulfur batteries. Moreover, it was found that the battery assembled with the GO-4 coated separator showed the best cycle performance, because GO-4 had high electrical and high oxidation degree. The initial specific discharge capacity of lithium-sulfur batteries using the GO-4 coated separator was 900.0 mA·h/g, higher than that of PE separator (763.2 mA·h/g). |
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| Keywords: | lithium-sulfur batteries polyethylene separator graphene oxide |
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