锂离子电池隔膜及技术进展  

LIB separators and the recent technical progress

作　　者：王畅[1] 吴大勇[1] 

机构地区：[1]中国科学院理化技术研究所,北京100190

出　　处：《储能科学与技术》2016年第2期120-128,共9页Energy Storage Science and Technology

基　　金：中国科学院战略性先导科技专项(XDA09010105)

摘　　要：介绍了锂电池隔膜的功能及影响其性能的因素。总结了近十年来在锂电隔膜研发和技术领域的热点,即高安全性、新材料、陶瓷涂覆和提高润湿性等。分析了包括3C锂电池及动力锂电池等两类电池对隔膜性能的要求,指出了3C锂离子电池隔膜需要往厚度更薄、孔隙率更高、耐热温度更高、均匀性更好等方向发展,动力锂电池则着重于提高能量密度,扩大电化学稳定窗口,提升耐高电压特性。并从聚烯烃改性、聚烯烃-陶瓷复合隔膜、新材料体系、新工艺方法等方面介绍了隔膜领域的主要技术进展。最后,分析并展望了我国隔膜产业的现状,指出在提高产能的同时,应更加注重对技术及工艺的自主研发以保证产品质量。Lithium-ion-battery（LIB） separators and their properties which affect the LIB＇s performance were introduced. The hot spots, safety related properties, new materials, ceramic coating and high wettability in LIB separators research were summarized. The technical requirements for LIB separators by sorting the LIB into two types（3 C battery and power battery） are also discussed. It is noted that 3C LIB separators need to have thinner thickness, higher porosity, higher heat resistance and better uniformity, while power LIB focus on increasing the energy density, expanding the electrochemical stability, enhancing the resistance to high voltage. The main progress in LIB separators＇ research were reviewed from the following four aspects： polyolefin modification, polyolefin-ceramic composite separator, new material systems and new process methods. Finally, the authors analyzed the status of separator industry in China, and suggested that more attention should be paid to independent research on technology and processes to ensure the quality of products with increasing of the productivity.

关 键 词：锂离子电池隔膜 改性 陶瓷涂覆 新材料 高安全性 

分 类 号：TM912.9[电气工程—电力电子与电力传动]