中文摘要：

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）。

英文摘要：

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/NP（;I）A 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 speci- fic capacity of the battery was 100. 2 mAh g-1 at a current density of 300 mA g-1.