A zwitterionic gel electrolyte for efficient solid-state supercapacitors.
A zwitterionic gel electrolyte for efficient solid-state supercapacitors.
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用于高效固态超级电容器的两性离子凝胶电解质
DOI：
10.1038/ncomms11782
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发表时间：
2016-05-26
影响因子：
16.6
通讯作者：
Xie Y
中科院分区：
文献类型：
--
作者：
Peng X;Liu H;Yin Q;Wu J;Chen P;Zhang G;Liu G;Wu C;Xie Y
凝胶电解质作为固体超级电容器材料越来越受到人们的关注。理想的凝胶电解质通常需要高离子迁移率、合理的机械强度和坚固的固态保水能力的组合，以确保良好的工作耐久性。在这里，我们报道了一种两性离子凝胶电解质，它成功地带来了坚固的保水能力和离子迁移通道的协同优势，表现在优异的电化学性能上。在应用两性离子凝胶电解质时，我们的石墨烯基固态超级电容器在0.8A cm−3时达到了300.8 F cm−3的体积电容，随着电流密度从0.8A cm−3增加到20A cm−3，其倍率容量仅有14.9%的电容损耗，据我们所知，这是先前报道的石墨烯固态超级电容器中的最佳值。我们预计，两性离子凝胶电解质可以作为固体超级电容器的凝胶电解质。
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.