Hefei National Laboratory for Physical Sciences at the Microscale, iChEM (Collaborative Innovation Centre of Chemistry for Energy Materials), Hefei Science Center (CAS), and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui 230026, China.
Nat Commun. 2016 May 26;7:11782. doi: 10.1038/ncomms11782.
Gel electrolytes have attracted increasing attention for solid-state supercapacitors. An ideal gel electrolyte usually requires a combination of advantages of high ion migration rate, reasonable mechanical strength and robust water retention ability at the solid state for ensuring excellent work durability. Here we report a zwitterionic gel electrolyte that successfully brings the synergic advantages of robust water retention ability and ion migration channels, manifesting in superior electrochemical performance. When applying the zwitterionic gel electrolyte, our graphene-based solid-state supercapacitor reaches a volume capacitance of 300.8 F cm(-3) at 0.8 A cm(-3) with a rate capacity of only 14.9% capacitance loss as the current density increases from 0.8 to 20 A cm(-3), representing the best value among the previously reported graphene-based solid-state supercapacitors, to the best of our knowledge. We anticipate that zwitterionic gel electrolyte may be developed as a gel electrolyte in solid-state supercapacitors.
凝胶电解质在固态超级电容器中受到越来越多的关注。理想的凝胶电解质通常需要结合高离子迁移率、合理的机械强度和固态下强大的保水能力的优势，以确保出色的工作耐久性。在这里，我们报告了一种两性离子凝胶电解质，它成功地带来了强大的保水能力和离子迁移通道的协同优势，表现出卓越的电化学性能。当应用两性离子凝胶电解质时，我们的基于石墨烯的固态超级电容器在 0.8 A cm(-3) 的电流密度下达到 300.8 F cm(-3) 的体积电容，当电流密度从 0.8 增加到 20 A cm(-3) 时，仅损失 14.9%的电容，这是迄今为止报道的基于石墨烯的固态超级电容器中的最佳值。据我们所知。我们预计两性离子凝胶电解质可以开发为固态超级电容器中的凝胶电解质。
