高分散纳米Al_2O_3改性复合电解质隔膜的性能  

Performance of composite electrolyte separator modified with highly dispersed nano-Al_2O_3

作　　者：周冉冉[1,2] 何向明[1,3] 尚玉明[1,3] 李建军[2] ZHOU Ran-ran HE Xiang-ming SHANG Yu-ming LI Jian-Jun(Institute of Nuclear and New Energy Technology, Tsinghua University, Bering 100084, China College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao ,Hebei 066004, China Huadong Institute of Lithium Ion Battery , Suzhou , Jiangsu 215600,China)

机构地区：[1]清华大学核能与新能源技术研究院,北京100084 [2]燕山大学环境与化学工程学院,河北秦皇岛066004 [3]江苏华东锂电技术研究院,江苏苏州215600

出　　处：《电池》2016年第5期235-238,共4页Battery Bimonthly

基　　金：国家重点基础研究发展计划(2011CB935902;2013CB934000);科技部高技术研究发展计划(2013AA050903);科技部国际科技合作项目(2014DFG71590);科技部国家中小企业创新基金(14C26213201106);江苏省科技支撑计划(BE2014006-2);清华大学自主科研计划(2011Z23152;2012THZ08129);汽车安全与节能国家重点实验室基金(ZZ2012-011;2012WJ-A-01)

摘　　要：将聚甲基丙烯酸甲酯（PMMA）包覆的氧化铝（Al2O3）高分散纳米杂化材料Al2O3@PMMA与聚偏氟乙烯-六氟丙烯（PVDF-HFP）共混,并与Celgard 2325膜复合,制备复合电解质隔膜。用SEM、交流阻抗和充放电测试等,研究复合隔膜的结构及电化学性能。Al2O3@PMMA/PVDF-HFP涂层可提高隔膜的离子电导率及吸液率、降低界面阻抗,以复合隔膜组装的LiCo1/3Ni1/3Mn1/3O2/Li扣式电池以8.0 C在2.84.3 V放电,比容量可达120 m Ah/g。Polymethylmethacrylate （PMMA） coated aluminium oxide （Al2O3 ） highly dispersed nano hybrid material Al2O3 @ PMMA was blended with poly （ vinylidenefluoride-eo-hexafluoroprepylene ） （ PVDF-HFP ）, then composited with Celgard 2325 membrane to prepared composite electrolyte separator. The structure and electrochemical performance of the composite separator were studied by SEM, AC impedance and charge-discharge tests. Al2O3 @ PMMA/PVDF-HFP coating could increase the ionic conductivity and liquid absorption of the separator, reduce the interfacial impedance. When discharged in 2. 8 - 4. 3 V with 8.0 C, the specific capacity of LiCol/3 Nil/3 Mnl/3 O2/Li cell assemble with the composite separator could reach to 120 mAh/g.

关 键 词：锂离子电池 复合隔膜 离子电导率 电化学性能 

分 类 号：TB332[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]