| PVDF-HFP基凝胶电解质用于LiNi0.5Co0.2Mn0.3O2三元正极锂离子电池 |
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| 引用本文： | 薛景元,侯博,莫岩,曹博凯,陈大明,李德,陈永.PVDF-HFP基凝胶电解质用于LiNi0.5Co0.2Mn0.3O2三元正极锂离子电池[J].材料导报,2017,31(12):6-10. |
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| 作者姓名： | 薛景元 侯博 莫岩 曹博凯 陈大明 李德 陈永 |
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| 作者单位： | 1. 海南大学材料与化工学院,南海海洋资源利用国家重点实验室,海南省硅锆钛资源综合开发与利用重点实验室,海口570228;2. 海南大学材料与化工学院,南海海洋资源利用国家重点实验室,海南省硅锆钛资源综合开发与利用重点实验室,海口570228;南开大学先进能源材料化学教育部重点实验室,天津300071 |
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| 基金项目： | 国家自然科学基金(51162006；51362009)；海南省重点项目(ZDXM2015118)；国际科技合作专项(KJHZ2015-02)；中央引导地方科技发展专项资金项目(ZY2016HN07)；海南大学科研启动基金(kyqd1539) |
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| 摘 要： | 以聚偏氟乙烯-六氟丙烯(Poly(vinylidene fluoride-hexafluoropropylene),PVDF-HFP)为聚合物基体,新戊二醇二丙烯酸酯(Neopentyl glycol diacrylate,NPGDA)为交联剂,在引发剂偶氮二异丁腈(2,2′-Azobis(2-methylpropionitrile),AIBN)的作用下通过室温现场聚合法制备凝胶电解质用于锂离子电池。探索不同质量比PVDF-HFP/NPGDA对凝胶电解质性能和LiNi_(0.5)-Co_(0.2)Mn_(0.3)O_2三元正极锂离子电池性能的影响。结果表明,当质量比为1∶1时,凝胶电解质具有较高的离子电导率,为8.45mS·cm~(-1),锂离子迁移数为0.78,电化学窗口为4.5V。在电流密度30mA·g~(-1)恒流充放电,首次放电比容量为143mAh·g~(-1),循环50次后仍高达135.3mAh·g~(-1)。电流密度为300mA·g~(-1)时,放电比容量为100.2mAh·g~(-1)。
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| 关 键 词： | 聚偏氟乙烯-六氟丙烯 凝胶电解质 LiNi0.5Co0.2Mn0.3O2 锂离子电池 电化学性能 |
PVDF-HFP Based Gel Electrolyte for Lithium-ion Battery with LiNi0.5Co0.2Mn0.3O2 Cathode |
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| XUE Jingyuan,HOU Bo,MO Yan,CAO Bokai,CHEN Daming,LI De and CHEN Yong.PVDF-HFP Based Gel Electrolyte for Lithium-ion Battery with LiNi0.5Co0.2Mn0.3O2 Cathode[J].Materials Review,2017,31(12):6-10. |
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| Authors: | XUE Jingyuan HOU Bo MO Yan CAO Bokai CHEN Daming LI De and CHEN Yong |
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| Affiliation: | State Key Laboratory of South China Sea Marine Resource Utilisation, Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, College of Materials Science and Chemical Engineering, Hainan University, Haikou 570228,State Key Laboratory of South China Sea Marine Resource Utilisation, Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, College of Materials Science and Chemical Engineering, Hainan University, Haikou 570228,State Key Laboratory of South China Sea Marine Resource Utilisation, Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, College of Materials Science and Chemical Engineering, Hainan University, Haikou 570228,State Key Laboratory of South China Sea Marine Resource Utilisation, Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, College of Materials Science and Chemical Engineering, Hainan University, Haikou 570228,State Key Laboratory of South China Sea Marine Resource Utilisation, Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, College of Materials Science and Chemical Engineering, Hainan University, Haikou 570228,State Key Laboratory of South China Sea Marine Resource Utilisation, Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, College of Materials Science and Chemical Engineering, Hainan University, Haikou 570228;Key Laboratory of Advanced Energy Materials Chemistry Ministry of Education, Nankai University, Tianjin 300071 and State Key Laboratory of South China Sea Marine Resource Utilisation, Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, College of Materials Science and Chemical Engineering, Hainan University, Haikou 570228;Key Laboratory of Advanced Energy Materials Chemistry Ministry of Education, Nankai University, Tianjin 300071 |
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| Abstract: | Gel electrolyte for lithium ion battery was prepared via room-temperature in-situ polymerization using poly(vinyli-denefluoride-co-hexafluoro-propylene) (PVDF-HFP) as polymer matrix,neopentylglycoldiacrylate (NPGDA) as crosslinking agent,2,2'-azobis(2-methylpropionitrile) (AIBN) as initiator.The effects of the mass ratio of PVDF-HFP/NPGDA on the performances of gel electrolyte and lithium ion batteries were investigated.The results showed that the gel electrolyte with the PVDF-HFP/NPGDA mass ratio of 1 ∶ 1 had a high ionic conductivity of 8.45 mS · cm-1,a lithium ion transport number of 0.78 and an electrochemical potential window of 4.5 V,as well as a good compatibility with lithium anode.The initial discharge specific capacity was 143 mAh ·g-1 at a current density of 30 mA · g-1,and the retention capacity was up to 135.3 mAh · g-1 after 50 cycles.The discharge specific capacity of the battery was 100.2 mAh · g-1 at a current density of 300 mA · g-1. |
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| Keywords: | PVDF-HFP gel electrolyte LiNi0 5Co0 2Mn0 3O2 lithium-ion battery electrochemical performance |
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