| 柔性自支撑PDDA-Si/G纳米复合薄膜的制备及储锂性能 |
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| 引用本文： | 张亚婷,张凯博,贾凯丽,贺新福,刘国阳,王伟,张永玲,邱介山. 柔性自支撑PDDA-Si/G纳米复合薄膜的制备及储锂性能[J]. 化工学报, 2019, 70(3): 1144-1151. DOI: 10.11949/j.issn.0438-1157.20181287 |
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| 作者姓名： | 张亚婷 张凯博 贾凯丽 贺新福 刘国阳 王伟 张永玲 邱介山 |
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| 作者单位： | 1. 西安科技大学化学与化工学院，陕西 西安 7100542. 国土资源部煤炭资源勘查与综合利用重点实验室，陕西 西安 7100213. 大连理工大学化工学院，辽宁 大连 1160244. 北京化工大学化学工程学院，北京 100029 |
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| 基金项目： | 国家自然科学基金项目(U1703251);陕西省重点研发计划项目(2017ZDCXL-GY-10-01-02);国土资源部煤炭资源勘查与综合利用重点实验室开放研究课题项目(KF2016-4) |
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| 摘 要： | 通过静电自组装技术成功制备得到柔性自支撑聚二烯二甲基氯化铵-Si/石墨烯(PDDA-Si/G)纳米复合薄膜。该复合薄膜无添加黏结剂及导电炭黑且仍能保持电极结构的完整性，其中石墨烯提供完整的导电网络和机械韧性。电化学测试结果表明，当电流密度为0.2 A/g，复合材料的比容量可达1439.9 (mA·h)/g，库仑效率保持98%以上。且在高电流密度(2 A/g)下，复合材料的比容量仍可维持在499.9 (mA·h)/g，远高于商品化纯Si电极的电化学性能。
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| 关 键 词： | 复合材料 纳米结构 硅 石墨烯薄膜 电化学 |
| 收稿时间： | 2018-11-02 |
| 修稿时间： | 2018-12-24 |
Preparation and lithium storage properties of flexible self-standing PDDA-Si/G nanocomposite film |
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| Yating ZHANG,Kaibo ZHANG,Kaili JIA,Xinfu HE,Guoyang LIU,Wei WANG,Yongling ZHANG,Jieshan QIU. Preparation and lithium storage properties of flexible self-standing PDDA-Si/G nanocomposite film[J]. Journal of Chemical Industry and Engineering(China), 2019, 70(3): 1144-1151. DOI: 10.11949/j.issn.0438-1157.20181287 |
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| Authors: | Yating ZHANG Kaibo ZHANG Kaili JIA Xinfu HE Guoyang LIU Wei WANG Yongling ZHANG Jieshan QIU |
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| Affiliation: | 1. College of Chemistry and Chemical Engineering, Xi’an University of Science and Technology, Xi’an 710054, Shaanxi, China2. Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Land and Resources, Xi’an 710021, Shaanxi, China3. School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China4. College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China |
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| Abstract: | Silicon is an active electrode material for future commercial lithium-ion batteries with extremely high theoretical specific capacity (4200 (mA·h)/g). However, the large volume change of silicon over charge-discharge cycles weakens its competitiveness in the capacity and cycle life. A flexible self-supporting polydiene dimethylammonium chloride-Si/graphene (PDDA-Si/G) nanocomposite film was successfully prepared by electrostatic self-assembly technique. The composite film can maintain the integrity of electrode structure without adding binder and conductive carbon black. Graphene provides complete conductive network and mechanical toughness. The electrochemical test results show that when the current density was 0.2 A/g, the specific capacity of PDDA-Si/G composite could reach 1439.9 (mA·h)/g and the Coulombic efficiency was above 98%. The specific capacity was 1209.3 (mA·h)/g after 80 cycles. The specific capacity still maintained 499.9 (mA·h)/g at a high current density (2 A/g). |
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| Keywords: | composites nanostructure silicon graphene film electrochemistry |
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