【作者】 赵鹏； 杨聚平； 王莉； 尚玉明； 何向明；

【Author】 Zhao Peng~1,Yang Ju-ping~1,Wang Li~(1,2),Shang Yu-ming~(1,3),He Xiang-ming~(1,3) 1.Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084 2.State Key Laboratory of Automotive Safety and Energy,Tsinghua University,Beijing 100084 3.Huadong Institute of Lithium Ion Battery,Zhangjiagang,Jiangsu 215600

【机构】 清华大学核能与新能源技术研究院； 汽车安全与节能国家重点实验室； 江苏华东锂电技术研究院；

【摘要】 聚烯烃隔膜的热收缩性极大的制约了锂电池的安全性应用。木文通过化学接枝法将有机-无机硅氧杂化体系引入到聚烯烃隔膜表面,在电化学性能改变不大的情况下极大地改善了隔膜的热收缩性,并成功地解决了陶瓷改性隔膜工业化的"掉粉"问题。更多还原

【Abstract】 The thermal shrinkage of the polyolefin separators has become a very critical issue for safety in lithium ion batteries.In this study,we coat commercialized Celgard-2300 separators with organic-inorganic hybrid materials by chemical grafting method,which fully avoid pulverization of conventional silica nanoparticles embedded in polymer matrices.The organic-inorganic hybrid coating proposed in this study is also employed to serve as a mechanical support,which endow polyolefin separators with improving thermal stability at elevated temperatures.The series of electrochemical experiment fully confirm that the organic-inorganic hybrid coating does not introduce much adverse effect on the battery performance while substantially diminish the thermal shrinkage.更多还原