writer：Guangwei He, Chaoyi Chang, Mingzhao Xu, Shen Hu, Lingqiao Li, Jing Zhao, Zhen Li, Zongyu Li, Yonghen
keywords：proton exchange membrane, functionalized graphene, nanochannel, proton conductivity
source：期刊
specific source：Adv Funct Mater, 25 (48), 7502-7511 (2015). DOI: 10.1002/adfm.201503229
Issue time：2015年
Simultaneous manipulation of the topological structure and chemical structure of the ionic nanochanels within solid electrolyte has been proved a crucial but challenging task for the rational design of high-performance electrochemical devices including proton exchange membrane fuel cell. Herein, we present a novel approach to the construction of tunable nanochannels via direct assembly of graphene oxide (GO)/polymer core-shell nanosheets. Through molecular-level engineering of the GO/polymer nanosheets, the ordered, continuous nanochannels, interconnected hydrogen-bond networks and favorable water environment of the ionic nanochannels can be facilely created. The resultant membrane exhibits a proton conductivity of 32 mS cm^-1 at 51% RH, surpassing the state-of-the-art Nafion membrane and all the reported GO based materials.