The ion droplets move the generator thermostate on the polymer load of graphene

The graphene-electrolyte interface has been proven to be used in a range of energy equipment platforms, such as solar cells, super capacitors, and lithium-ion batteries. Notably, a new graphene-based generator has recently been reported that uses the graphene-liquid interface to convert the mechanical energy of moving ion droplets into electrical energy, providing an attractive new solution for scalable power generation.
1. The voltage generated in polymer-backed single-layer graphene devices
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. (a) Experimental devices for power generation and SFVS measurements on devices consisting of graphene/polymer membranes on SiO2 plates. (b) A diagram of the voltage generated by measuring the voltage by rolling droplets on graphene/polymer. (c) The oscillostor trajectory shows voltage spikes generated by graphene/PET (red) and graphene/PMMA (blue), respectively
in such a device, the flow of ionic liquid droplets on the graphene surface supported by the substrate generates an electric current in the opposite direction of flow, an effect that can also be observed at the interface between polymer-coated insulators and water. At the macro level, the mechanism of this power generation phenomenon can be explained by drawing a potential model: the selective ions of the solute can be adsorbed in the solid/solution interface and form a fake capacitor with the solid. As the ion droplets move along the graphene surface, the ions that tend to adhere to the interface are attracted forward (charging the capacitor) or repelling from the backward edge (discharge of the capacitor). At the same time, the carriers with opposite charges in graphene are drawn to the forward and backward edges, causing current to flow through the graphene layer. Therefore, how effectively ions attract to the interface determines their power generation efficiency. At the microscopic scale, however, there is still debate about the potential mechanism for attracting ions to the solution/graphene interface. The current lack of microcosm hinders the ability to optimize and control ions and the performance of energy sensors in experiments. In addition, the microscopic origin of ion adsorption at the liquid/graphene interface is very important for graphene electrochemical devices.
ion adsorption at the water/graphene/PET interface. (a) and frequency vibration spectra, shown in the C-O stretch mode at the graphene/PMMA and graphene/PET interfaces, respectively, representing the strong C-O polarity sorting on the 21st interface. (b) The calculation of the azithago anthomosic headings in the x-y plane produced by the square array of C-O even poles. (c) The relative increase in frequency intensity relative to NaCl concentration of single-layer and 3-5-layer graphene/PET devices. (d) The relationship between surface Na-density and volume NaCl concentration derived from the spectrum using the Gooy-Chapman model. (e) A diagram of the movement of the electron-to-drop front edge in the solution in the ion droplet and in graphene., a study on polymer-backed graphene power generation equipment and frequency resonance spectroscopy (SFVS) was reported in the latest study published in JACS. Based on the polymer surface, solution/polymer interface and solution/graphene/polymer interface and frequency vibration spectrum, the study concluded that the ions in the solution are not attracted to graphene or pre-charged surfaces; groups, which are attracted by graphene/polymers or polymers without graphene; single-layer graphene is represented as a weak shield in the even-pole field and serves as an passive conductive path to generate current; and the interaction between ions and surface even-pole layers is short-range. In addition, the study also discusses the parameters that may improve the efficiency of the device. The result is a more comprehensive power generation of electrolytic solutions/graphene/polymer equipment, which will help design such equipment for higher efficiency and switchable operation in the future.