Inorganic nanostructured materials for high performance electrochemical supercapacitors

Flexible all-solid-state micro-supercapacitor based on Ni fiber electrode coated with MnO2 and reduced graphene oxide via electrochemical deposition

“…. . 2 FEs were assembled into a symmetrical, flexible and fiber-shaped micro-supercapacitor by using PVA-LiCl gel as the solid electrolyte, and the obtained micro-supercapacitor exhibited an areal specific capacitance of 26.9 mF cm −2 and a volumetric specific capacitance of 7.2 F cm −3 at 0.1 mA cm −2 . Moreover, a high power density of 0.1 W cm −3 could be obtained when the energy density was as high as 0.27 mW h cm −3 .…”

“…As one kind of important devices for energy storage, supercapacitors (SCs, also named electrochemical capacitors) can operate at a high charge/discharge rate over a large number of cycles, bridging the gap between high energy batteries and high power conventional electrostatic capacitors [1,2]. Generally, SCs can be divided into two major categories according to the energy storage mechanism.…”

“…By using Ni fiber as fibrous structural support, MnO 2 . A three-electrode system was used in the electrochemical deposition of rGO and MnO 2 on Ni fibers with a platinum wire as counter electrode and saturated calomel electrode (SCE) as reference electrode.…”

Symmetric Electrodes for Electrochemical Energy‐Storage Devices

“…Nowadays, the existing rechargeable energy‐storage systems include sodium‐ion batteries (SIBs), lithium‐ion batteries (LIBs), and supercapacitors. Owing to some intrinsic disadvantages of the employed electrodes, the practical utilization of these systems is still hindered by the high safety risk, sophisticated production process and high cost 22, 23, 24, 25, 26, 27, 28, 29. Therefore, the search for new electrode materials with scalable production, low cost, high energy density, and high safety has attracted tremendous attention.…”

Hollow MO x -RuO2 (M = Co, Cu, Fe, Ni, CuNi) nanostructures as highly efficient electrodes for supercapacitors

“…Transition metal oxides are electrochemically active materials that facilitate redox reactions for charge build-up at the electrodes of pesudocapacitors [8][9][10]. Among various transition metal oxides as electrodes for supercapacitors, ruthenium dioxide (RuO 2 ) has been extensively studied because of its remarkably high theoretical specific capacitance, wide potential window, highly reversible redox reactions, good thermal stability, long cycle life, metallictype conductivity, and high rate capability [11][12][13][14].…”