Electrolyte gating in graphene-based supercapacitors and its use for probing nanoconfined charging dynamics
Jing Xiao, Hualin Zhan, Xiao Wang, Zai-Quan Xu, Zhiyuan Xiong, Ke Zhang, George P Simon, Jefferson Zhe Liu, Dan Li
Nature Nanotechnology | Nature Research | Published : 2020
Graphene-based nanoporous materials have been extensively explored as high-capacity ion electrosorption electrodes for supercapacitors. However, little attention has been paid to exploiting the interactions between electrons that reside in the graphene lattice and the ions adsorbed between the individual graphene sheets. Here we report that the electronic conductance of a multilayered reduced graphene oxide membrane, when used as a supercapacitor electrode, can be modulated by the ionic charging state of the membrane, which gives rise to a collective electrolyte gating effect. This gating effect provides an in-operando approach for probing the charging dynamics of supercapacitors electricall..View full abstract
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Awarded by Australia Research Council
We acknowledge financial support from the Australia Research Council (DP140102624, DP180102890 and FL180100029) and the University of Melbourne. This work made use of the facilities at the Monash Centre for Electron Microscopy (MCEM) and Melbourne Centre for Nanofabrication (MCN).