文章基本信息

标题：Alternately Dipping Method to Prepare Graphene Fiber Electrodes for Ultra-high-Capacitance Fiber Supercapacitors
本地全文：下载
作者：Guoxing Qu ; Yu Zhou ; Jiahao Zhang 等
期刊名称：iScience
印刷版ISSN：2589-0042
出版年度：2020
卷号：23
期号：8
页码：1-41
DOI：10.1016/j.isci.2020.101396
语种：English
出版社：Elsevier
摘要：SummaryFlexible fiber supercapacitors are promising candidate for power supply of wearable electronics. Fabrication of high-performance fibers is in progress yet challenging. The currently available graphene fibers made from wet-spinning or electro-deposition technologies are far away from practical applications due to their unsatisfactory capacitance. Here we report a facile alternately dipping (AD) method to coat graphene on wire-like substrates. The excellent mechanical properties of the substrate with greatly diverse choices can be carried over to the fiber supercapacitors. Under such guideline, the graphene fiber with a titanium core made by our AD method (AD:Ti@RGO) shows an ultra-high specific capacitance of up to 1,722.1 mF cm−2, which is ∼1,000 times that of wet-spinning- and electro-deposition-fabricated neat graphene fibers and presents the highest specific capacitance to date. With excellent mechanical properties and striking electrochemical performances, the AD:Ti@RGO-based supercapacitors light the path to the next-generation technologies for wearable devices.Graphical AbstractDisplay OmittedHighlights•A novel alternately dipping method to fabricate graphene fibers is reported•This method brings the fibers excellent mechanical and electrochemical properties•The graphene fiber shows an ultra-high specific capacitance of 1,722.1 mF cm−2Energy Storage; Mechanical Property; Energy Materials