Polydopamine coated poly(m-phenylene isophthalamid) membrane as heat-tolerant separator for lithium-ion batteries
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ORIGINAL PAPER
Polydopamine coated poly(m-phenylene isophthalamid) membrane as heat-tolerant separator for lithium-ion batteries Fusheng Pan 1,2 & Lina Qiao 1,2,3 & Biao Yuan 3 & Cuijia Duan 3 & Jianjie Wang 1,2,3 & Wei Wu 3 & Quanfan Lin 4 & Yake Shi 4 & Zan Chen 1,3 & Zhongyi Jiang 1,2 Received: 22 March 2020 / Revised: 25 June 2020 / Accepted: 14 July 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Poly(m-phenylene isophthalamide) (PMIA) membranes are promising heat-tolerant separator candidates of lithium-ion batteries (LIBs), while their wettability toward carbonate electrolyte and corresponding batteries performance are not desirable. Herein, PMIA membranes coated with ultrathin mussel-inspired polydopamine (PDA) layer were fabricated as separators in LIBs. The introduced amino, quinonyl, and catechol groups in PDA coating could enhance the wettability of the resultant PMIA-PDA separator toward electrolyte. The PMIA-PDA separator had excellent thermal stability, showing a thermal shrinkage of 5.2% at 200 °C. The contact angle of the thermal-treated PMIA-PDA separator could maintain at 26.1°, which decreased by 42.7% compared with the pristine PMIA separator. The PMIA-PDA separator also displayed a high ionic conductivity (0.86 mS cm−1) and a low interfacial electric resistance (62.4 Ω). Consequently, the assembled LiCoO2/PMIA-PDA/Li battery achieved good cyclic stability with the capacity retention of 84.3% (121.1 mAh g−1) after 100 cycles under 30 °C. More significantly, the relevant capacity retention remained at 89.0% (127.5 mAh g−1) under 60 °C, which implied a great potential of PMIA-PDA membranes as separators of high-safety LIBs. Keywords Poly(m-phenylene isophthalamide) . Polydopamine . Microporous separator . Heat-tolerance . Lithium-ion batteries
Introduction
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11581-020-03699-y) contains supplementary material, which is available to authorized users. * Zan Chen [email protected] * Zhongyi Jiang [email protected] 1
Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
2
Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, People’s Republic of China
3
Key Laboratory of Membrane and Membrane Process, CenerTech Tianjin Chemical Research and Design Institute Co., Ltd., Tianjin 300131, China
4
School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
Lithium-ion batteries (LIBs), a kind of energy storage devices, have drawn extensive attention in portable electronic devices and electric vehicles, owing to their virtues of high working voltage, excellent current discharge capability, and environmental friendliness [1–3]. The separator is an indispensable component of the LIBs system, which can impede short circuit between positive a
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