Microwave-assisted synthesis of titania coating onto polymeric separators for improved lithium-ion battery performance

Ruey Shin Juang, Chien Te Hsieh*, Po An Chen, Yu Fu Chen

*此作品的通信作者

研究成果: 期刊稿件文章同行評審

64 引文 斯高帕斯(Scopus)

摘要

This study adopts an efficient microwave-assisted method to deposit TiO2 into tri-layered polymeric membranes, forming composite separators for Li-ion batteries (LIBs) consisted of Li4Ti5O12 (LTO) anode/Li cathode. The microwave deposition is capable of growing TiO2 crystals into the porous membranes at 40 °C in a short period of ∼8 min. Both improved thermal and dimensional stability are achieved by the deposition of TiO2 in the separators. The improvement can be attributed to the formation of robust skeleton to stabilize the separators, imparting a superior insulation and mass transport barrier against volatile compounds formed during the thermal decomposition process. After depositing an appropriate amount of TiO2, the TiO2-coated separator still features well-developed porous structure, allowing favorable liquid wettability and high mass uptake of electrolyte. The amount of TiO2 deposits plays as a crucial role in facilitating the cell performance, including high ionic conductivity, low inner resistance, high operation temperature, high energy density, and excellent cycleability. Accordingly, this low-temperature deposition method of modifying polymeric separators is attractive for application in high-performance LIBs.

原文英語
頁(從 - 到)526-533
頁數8
期刊Journal of Power Sources
286
DOIs
出版狀態已出版 - 15 07 2015

文獻附註

Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.

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