Enhanced performance of modified HDPE separators generated from surface enrichment of polyether chains for lithium ion secondary battery
作者： Jun-Li Shi , Li-Feng Fang , Hao Li , Zhi-Ying Liang , Bao-Ku Zhu
DOI: 10.1016/J.MEMSCI.2012.11.055
关键词:
摘要: Abstract Porous high density polyethylene (HDPE) membrane is an important type of separator for lithium ion batteries (LIBs). To improve the electrochemical performances HDPE-based separators, a copolymer poly(ethylene- block -ethylene glycol) (PE- b -PEG) was blended into porous HDPE separators via TIPS process. By measuring composition, morphology and crystallinity, etc., phase behavior surface enrichment HDPE/PE- -PEG/LP system were studied. Compared with pure PE- -PEG chains enhanced compatibility between liquid electrolyte electrodes. The ionic conductivity soaked blend up to 1.24×10 −3 S cm −1 at 25 °C. Furthermore, interface resistance electrode effectively reduced by enriched polyether chains. All results indicated that could be promising substance prepared
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