Preparation of Microporous Membranes by Swift Heavy Ion Irradiation and Impedance Characterization

doi:10.3866/PKU.WHXB20100618

CORC > 近代物理研究所 > 中国科学院近代物理研究所 > 近代物理研究所知识存储（2010之前）

	Preparation of Microporous Membranes by Swift Heavy Ion Irradiation and Impedance Characterization
	Chen Yan-Feng 1,2; Sun You-Mei2 ; Hou Ming-Dong 2; Duan Jing-Lai2 ; Cao Dian-Liang 2; Zhang Ling 2; Fang Xiang-Peng 1,3; Qu Xiao-Hua 1,2; Liu Jie2 ; Wang Zhao-Xiang 3
刊名	ACTA PHYSICO-CHIMICA SINICA
	2010-06-01
卷号	26 期号:6 页码:1722-1726
关键词	Electrochemical impedance spectroscopy Polypropylene microporous membrane Lithium-ion battery separator Swift heavy ion irradiation Track-etching
ISSN号	1000-6818
DOI	10.3866/PKU.WHXB20100618
英文摘要	Polypropylene (PP) microporous membranes were successfully prepared by swift heavy ion irradiation and track-etching. Polypropylene foils were irradiated with Au-197 ions of kinetic energy 11.4 MeV.u(-1) (total energy of 2245.8 MeV) and fluence 1x10(8) ions.cm(-2) at normal incidence. The damaged regions produced by the gold ions along the trajectories were etched in H2SO4 and K2Cr2O7 solutions leading to the formation of cylindrical pores in the membranes. The pore diameters of the PP microporous membranes increased from 380 to 1610 nm as the etching time increased from 5 to 30 min. The surface and cross-section morphologies of the porous membranes were characterized by scanning electron microscopy (SEM). The micropores in the membranes were found to be cylindrical in shape, homogeneous in distribution, and equal in size. Some mathematical relations of the porosity of the PP microporous membranes were established by analytic derivation. The microporous membranes were used in lithium-ion batteries to measure their properties as separators. The electrical conductivity of the porous membrane immersed in liquid electrolyte was found to be comparable to that of commercial separators by electrochemical impedance spectroscopy (EIS). The results showed that the porosity and electrical conductivity were dependent on the ion fluence and etching time. By adjusting these two factors, microporous membranes with good porosity and electrical conductivity were made that met the requirements for commercial use.
资助项目	West Light Foundation of the Chinese Academy of Sciences ; National Natural Science Foundation of China[10775161] ; National Natural Science Foundation of China[10805062] ; National Natural Science Foundation of China[10975164]
WOS关键词	BATTERIES ; SEPARATOR ; FABRICATION ; NANOWIRES
WOS研究方向	Chemistry
语种	英语
出版者	PEKING UNIV PRESS
WOS记录号	WOS:000278106600040
资助机构	West Light Foundation of the Chinese Academy of Sciences ; National Natural Science Foundation of China
公开日期	2011-04-20
内容类型	期刊论文
源URL	[http://ir.imp.cas.cn/handle/113462/7579]
专题	近代物理研究所_近代物理研究所知识存储（2010之前）近代物理研究所_材料研究中心
通讯作者	Liu Jie
作者单位	1.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 3.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Chen Yan-Feng,Sun You-Mei,Hou Ming-Dong,et al. Preparation of Microporous Membranes by Swift Heavy Ion Irradiation and Impedance Characterization[J]. ACTA PHYSICO-CHIMICA SINICA,2010,26(6):1722-1726.
APA	Chen Yan-Feng.,Sun You-Mei.,Hou Ming-Dong.,Duan Jing-Lai.,Cao Dian-Liang.,...&Yao Hui-Jun.(2010).Preparation of Microporous Membranes by Swift Heavy Ion Irradiation and Impedance Characterization.ACTA PHYSICO-CHIMICA SINICA,26(6),1722-1726.
MLA	Chen Yan-Feng,et al."Preparation of Microporous Membranes by Swift Heavy Ion Irradiation and Impedance Characterization".ACTA PHYSICO-CHIMICA SINICA 26.6(2010):1722-1726.