CAJ | 학술논문

以丙酮为溶剂,聚偏氟乙烯(PVDF)为成膜物质,纳米Si O 2为填料,采用流延法制备聚偏氟乙烯复合隔膜.TG-DSC 测试结果表明,该隔膜在420℃急剧热失重,500℃时几乎反应完全.该隔膜在185℃时放热速率达到阈值0．05 K/min.SEM照片显示该隔膜平均孔径约为2μm,三维结构且孔隙率较高,有利于吸附电解液.由该隔膜制作的60 Ah锂离子电池内阻约为0．85Ω?cm2,制作的40 Ah单电芯55℃,3 C放电,电池表面温升5．8℃；制作的14s-60 Ah的电池组循环500次,容量衰减16．2％.
이병동위용제,취편불을희(PVDF)위성막물질,납미Si O 2위전료,채용류연법제비취편불을희복합격막.TG-DSC 측시결과표명,해격막재420℃급극열실중,500℃시궤호반응완전.해격막재185℃시방열속솔체도역치0．05 K/min.SEM조편현시해격막평균공경약위2μm,삼유결구차공극솔교고,유리우흡부전해액.유해격막제작적60 Ah리리자전지내조약위0．85Ω?cm2,제작적40 Ah단전심55℃,3 C방전,전지표면온승5．8℃；제작적14s-60 Ah적전지조순배500차,용량쇠감16．2％.
PVDF composite separator was prepared through solution blending method,using acetone as solvent, PVDF as film forming material and nano-silica as the filling.The study showed the separator reacted at 420 ℃and decomposed completely at 500 ℃.The ARC curve illustrated the heat release rate of the separator reached threshold of 0.05 K/min at 185 ℃.The SEM results showed the pore diameter was 2μm.The separator was beneficial to adsorb electrolyte because of many microporous.The resistance of the polymer lithium battery made by the separator was 0.85 Ω?cm2 .The surface temperature rising of the 40 Ah battery was 5.8 ℃,dis-charged at 3 C rate at 55 ℃.The capacity of 14s-60 Ah batteries faded 16.2% after 500 cycles.