期刊
ADVANCED FUNCTIONAL MATERIALS
卷 27, 期 34, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201701768
关键词
controlled pore structure; enhanced interfacial compatibility; gel electrolytes; nonsolvent induced phase separation (NIPS); sodium ion batteries
类别
资金
- Energy Efficiency & Resources Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry & Energy, Republic of Korea [20152010103470]
- KIST Institutional Program [2E25630]
- NRF of Korea - Ministry of Science, ICT & Future Planning [NRF-2015M2A2A6A01045277]
- National Research Foundation of Korea (NRF) - Korea government [NRF-2015M2A2A6A01045277, NRF-2016R1A2A1A05005216]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20152010103470] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Ministry of Science & ICT (MSIT), Republic of Korea [2E27090] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2015M2A2A6A01045277, 2016R1A2A1A05005216] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this work, a structurable gel-polymer electrolyte (SGPE) with a controllable pore structure that is not destroyed after immersion in an electrolyte is produced via a simple nonsolvent induced phase separation (NIPS) method. This study investigates how the regulation of the nonsolvent content affects the evolving nanomorphology of the composite separators and overcomes the drawbacks of conventional separators, such as glass fiber (GF), which has been widely used in sodium ion batteries (SIBs), through the regulation of pore size and gel-polymer position. The interfacial resistance is reduced through selective positioning of a poly(vinylidene fluoride-co-hexa fluoropropylene) (PVdF-HFP) gel-polymer with the aid of NIPS, which in turn enhances the compatibility between the electrolyte and electrode. In addition, the highly porous morphology of the GF/SGPE obtained via NIPS allows for the absorption of more liquid electrolyte. Thus, a greatly improved cell performance of the SIBs is observed when a tailored SGPE is incorporated into the GF separator through charge/discharge testing compared with the performance observed with pristine GF and conventional GF coated with PVdF-HFP gel-polymer.
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