This work presents the first electrochemical quartz crystal microbalance (EQCM) results for vertically-oriented graphene nanosheets (VOGNs) as supercapacitor electrodes. Conventional EQCM technique delivered primary insights on the ionic exchange mechanisms between VOGNs and organic electrolytes, showing a major contribution of anions. A more advanced electrogravimetric methodology, ac-electrogravimetry, was then used to access specific dynamic attributes for each species exchanged at the VOGN electrode surface. Accordingly, under the conditions of this study, anions were confirmed to be the major energy storage vector with high kinetic values and low transfer resistance while cations and free solvent molecules are given non-negligible supporting roles.

这项工作提出了垂直取向的石墨烯纳米片（VOGNs）作为超级电容器电极的第一个电化学石英晶体微天平（EQCM）结果。常规的EQCM技术对VOGN与有机电解质之间的离子交换机理提供了主要见识，显示出阴离子的重要作用。更先进的方法electrogravimetric，交流然后-electrogravimetry，用于用于在VOGN电极表面交换每个物种访问特定的动态属性。因此，在本研究的条件下，证实阴离子是主要的储能载体，具有高动力学值和低转移阻力，而阳离子和游离溶剂分子则具有不可忽视的支持作用。