| 石墨负极表面聚合物功能保护膜对 锂离子电池存储寿命的提升 |
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| 引用本文： | 李宇杰,刘勇,赵奇志,郑春满.石墨负极表面聚合物功能保护膜对 锂离子电池存储寿命的提升[J].高等学校化学学报,2019,40(12):2542. |
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| 作者姓名： | 李宇杰 刘勇 赵奇志 郑春满 |
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| 作者单位： | 国防科技大学空天科学学院,长沙,410073;国防科技大学空天科学学院,长沙410073;中国人民解放军61699部队,枝江443200;中国人民解放军61699部队,枝江,443200 |
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| 基金项目： | 装备预研领域基金(JZX5Y20190261003101) |
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| 摘 要： | 采用溶液浸渍法制备了聚乙烯醇(PVA)均匀包覆的石墨并研究了其微观形貌及电化学性能. 以LiNi0.8Co0.15Al0.05O2(NCA)为正极材料、 PVA包覆石墨为负极材料组装成软包电池和钢壳电池, 研究了PVA功能保护膜对全电池的电化学性能和存储寿命的影响. 结果表明, 存储过程中PVA功能保护膜可以有效抑制电解液和石墨内嵌锂反应的发生, 延长电池的存储寿命.
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| 关 键 词： | 聚乙烯醇 表面包覆 石墨负极 储存寿命 锂电池 功能保护膜 |
| 收稿时间： | 2019-07-11 |
Study on Improving Storage Life of Lithium Ion Batteries Based on Construction of Polymer Functional Protective Film on the Surface of Graphite Anode ? |
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| Yujie LI,Yong LIU,Qizhi ZHAO,Chunman ZHENG.Study on Improving Storage Life of Lithium Ion Batteries Based on Construction of Polymer Functional Protective Film on the Surface of Graphite Anode ?[J].Chemical Research In Chinese Universities,2019,40(12):2542. |
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| Authors: | Yujie LI Yong LIU Qizhi ZHAO Chunman ZHENG |
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| Institution: | 1. College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China;2. Chinese People’s Liberation Army 61699 Troops, Zhijiang 443200, China; |
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| Abstract: | Graphite anode uniformly coated with polyvinyl alcohol(PVA) was prepared by solution impregnation method. The morphology and electrochemical properties of graphite coated with PVA were stu-died. LiNi0.8Co0.15Al0.05O2(NCA) was used as cathode material and graphite coated with PVA was used as negative material to assemble soft-packed batteries. The effects of PVA coating on the electrical performance and storage life of full-scale batteries were studied. The results show that PVA coating can effectively inhibit the reaction between electrolyte and graphite-embedded lithium and prolong the storage life of the battery. |
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| Keywords: | Polyvinyl alcohol Surface coating Graphite anode Storage life Lithium battery Functional protective film |
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