A new strategy for enhancing the room temperature conductivity of solid-state electrolyte by using a polymeric ionic liq
- PDF / 1,576,687 Bytes
- 10 Pages / 595.276 x 790.866 pts Page_size
- 1 Downloads / 191 Views
ORIGINAL PAPER
A new strategy for enhancing the room temperature conductivity of solid-state electrolyte by using a polymeric ionic liquid Yifan Sha 1,2 & Tao Dong 2 & Qiu Zhao 1,2 & Hongshuai Zheng 2 & Xinge Wen 2 & Shimou Chen 2 & Suojiang Zhang 2 Received: 15 February 2020 / Revised: 19 May 2020 / Accepted: 26 May 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract An ether-functionalized polymeric ionic liquid poly(methyl methacrylate-1-vinyl-3-methoxyl-ethyl-imidazolium bis(trifluoromethanesulfonyl)imide) P(MMA-co-VIm(1O2)) (TFSI) polymeric ionic liquid (PIL) was successfully synthesized, characterized, and used as polymer matrix. The performances of solid polymer electrolytes membrane were measured through blending with poly(vinylidene fluoride-cohexafluoropropylene) (PVDF-HFP) and 1-propyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl) imide ([Pyr13][TFSI]). The ionic conductivity of polymer electrolytes was optimized up to 5.10 × 10−4 S cm−1 at 25 °C, and a wide electrochemical window of 5.23 V vs Li/Li+ could be obtained. Moreover, the polymer electrolytes showed excellent cycle performance for Li/LiFePO4 cell at both 25 °C and 60 °C, demonstrating the capability of being a promising candidate for the application of solid-state lithium-ion batteries. Keywords Polymer electrolyte . Polymeric ionic liquid . Solid-state lithium-ion batteries
Introduction Lithium-ion batteries (LIBs) have been utilized in vast applications due to their high energy density, high power density, long life, and environment friendly characteristics [1–3]. In LIBs, electrolyte is one of the most critical components to determine the performance of batteries. Therefore, intensive interests have been focused on electrolyte including liquid electrolytes and solid-state electrolytes (SSEs) [4–6]. Though liquid electrolytes own advantages of well wetting of electrode surfaces and high conductivity, various issues such as unstable solid electrolyte interphase (SEI), relatively low mechanical strength, and flammability limit the development for numerous practical applications [7–9]. Thus, to Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11581-020-03638-x) contains supplementary material, which is available to authorized users. * Suojiang Zhang [email protected] 1
School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China
2
Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
achieve safer and more stable LIBs, SSEs are good choices which include solid polymer electrolytes (SPEs) because their adequate flexibility and moderate mechanical strength (106~108 Pa) [10, 11]. Poly(ethylene oxide) (PEO) was the first qualified polymer matrix material of SPEs due to its ability of lithium-ion transport [4, 12]. Besides, more and more lithium-ion conductive polym
Data Loading...
