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一种采用氧化石墨烯掺杂的离子液体基固体共聚物电解质制备固态双电层电容器的方法。

An Approach to Solid-State Electrical Double Layer Capacitors Fabricated with Graphene Oxide-Doped, Ionic Liquid-Based Solid Copolymer Electrolytes.

作者信息

Fattah N F A, Ng H M, Mahipal Y K, Numan Arshid, Ramesh S, Ramesh K

机构信息

Centre for Ionics Universiti Malaya, Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.

出版信息

Materials (Basel). 2016 Jun 6;9(6):450. doi: 10.3390/ma9060450.

DOI:10.3390/ma9060450
PMID:28773573
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5456773/
Abstract

Solid polymer electrolyte (SPE) composed of semi-crystalline poly (vinylidene fluoride-hexafluoropropylene) [P(VdF-HFP)] copolymer, 1-ethyl-3-methylimidazolium bis (trifluoromethyl sulphonyl) imide [EMI-BTI] and graphene oxide (GO) was prepared and its performance evaluated. The effects of GO nano-filler were investigated in terms of enhancement in ionic conductivity along with the electrochemical properties of its electrical double layer capacitors (EDLC). The GO-doped SPE shows improvement in ionic conductivity compared to the P(VdF-HFP)-[EMI-BTI] SPE system due to the existence of the abundant oxygen-containing functional group in GO that assists in the improvement of the ion mobility in the polymer matrix. The complexation of the materials in the SPE is confirmed in X-ray diffraction (XRD) and thermogravimetric analysis (TGA) studies. The electrochemical performance of EDLC fabricated with GO-doped SPE is examined using cyclic voltammetry and charge-discharge techniques. The maximum specific capacitance obtained is 29.6 F∙g, which is observed at a scan rate of 3 mV/s in 6 wt % GO-doped, SPE-based EDLC. It also has excellent cyclic retention as it is able keep the performance of the EDLC at 94% even after 3000 cycles. These results suggest GO doped SPE plays a significant role in energy storage application.

摘要

制备了由半结晶聚（偏氟乙烯-六氟丙烯）[P(VdF-HFP)]共聚物、1-乙基-3-甲基咪唑双（三氟甲基磺酰）亚胺[EMI-BTI]和氧化石墨烯（GO）组成的固体聚合物电解质（SPE），并对其性能进行了评估。从提高离子电导率以及其双电层电容器（EDLC）的电化学性能方面研究了GO纳米填料的作用。与P(VdF-HFP)-[EMI-BTI] SPE体系相比，GO掺杂的SPE的离子电导率有所提高，这是由于GO中存在丰富的含氧官能团，有助于提高聚合物基体中的离子迁移率。通过X射线衍射（XRD）和热重分析（TGA）研究证实了SPE中材料的络合作用。采用循环伏安法和充放电技术研究了用GO掺杂的SPE制备的EDLC的电化学性能。在6 wt% GO掺杂的基于SPE的EDLC中，在3 mV/s的扫描速率下获得的最大比电容为29.6 F∙g。它还具有优异的循环保持率，即使在3000次循环后，EDLC的性能仍能保持在94%。这些结果表明，GO掺杂的SPE在储能应用中起着重要作用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/99ac/5456773/8d598bb98a5e/materials-09-00450-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/99ac/5456773/432e02fcca82/materials-09-00450-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/99ac/5456773/6a889f06d778/materials-09-00450-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/99ac/5456773/a3a5765d79cd/materials-09-00450-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/99ac/5456773/8d598bb98a5e/materials-09-00450-g012.jpg

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