Performance of through-hole anodic aluminum oxide membrane as a separator for lithium-ion battery

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• 作者：Jingjuan Chen^a ; ^b ; Suqing Wang^a ; ^{cesqwang@scut.edu.cn" class="auth_mail} ; Liangxin Ding^a ; Yanbin Jiang^a ; Haihui Wang^a ; ^{hhwang@scut.edu.cn" class="auth_mail}
• 关键词：Lithium-ion battery ; AAO membrane ; Separator ; LiFePO4
• 刊名：Journal of Membrane Science
• 出版年：1 July, 2014
• 年：2014
• 卷：461
• 期：Complete
• 页码：22-27
• 全文大小：815 K

文摘

A high porosity through-hole anodic aluminum oxide (AAO) membrane has been prepared by a two-step anodization procedure. The as-prepared AAO membrane is around 60 渭m thick with a uniform pore size of about 80 nm. Moreover, we also found that the AAO membrane not only has a good mechanical strength but also shows better performances on electrolyte infiltration and retention compared with the commercial polymer separator. The LiFePO₄/graphite battery using the AAO separator exhibits better cycling stability, rate capability and low-temperature performance than those using the polymer separators. The excellent electrochemical performances can be attributed to good hydrophilic characteristic, high porosity and through-pore structure of the AAO separators used. Therefore, the AAO separator is very promising to be applied in lithium-ion batteries.