Bifunctional NiCuO_x photoelectrodes to promote pseudocapacitive charge storage by in situ photocharging

Abstract

Charging electrochemical devices by light irradiation may bring an essential change in energy-storage technologies. Herein, nickel copper mixed oxides (NiCuOx) based bifunctional photoelectrodes for integrated energy conversion and energy storage...

Tuned Bimetallic Fe–Ni Thiophosphides as Advanced Battery Materials for Asymmetric Electrochemical Supercapacitors with Outstanding Energy Density

“…However, their energy densities are still lower than those of batteries, hindering their practical use. − Consequently, improving the energy density of supercapacitors without sacrificing their intrinsic high power density has stimulated increasing efforts recently. The construction of asymmetric supercapacitors (ASCs) is considered among the best strategies to resolve this issue by using carbon-based material as the negative pole and battery-like material as the positive pole. − The faradic process taking place at the positive side would provide high energy density, whereas high power density/rate capability could be enabled by the negative electrode material via the formed electric double layer (EDL) without any chemical interaction between the active material and the electrolyte. ,− Therefore, the ASC inherits the advantages of batteries and supercapacitors, which can improve both energy density and power density. The rational design of a positive electrode with a high specific capacitance and excellent electrochemical characteristics is a major challenge to achieve high performance supercapacitor devices.…”

Cobalt oxide decked with inorganic-sulfur containing vanadium oxide for chromium(vi) reduction and UV-light-assisted methyl orange degradation

“…31 So, finding the benefits of heterojunctions researchers are driven towards the design of newer photocatalysts or materials for sustainable development. [32][33][34] Other than Cr(VI), the coloured dye molecules that are mostly released from textile industries are also harmful for the aquatic life and passively for human beings as well. 35,36 The most challenging part is the decomposition of such coloured dye molecules to CO 2 and H 2 O.…”

Optimized Synthesis of Nanostructured Trimetallic Mn–V–Fe Selenides with Battery-Type Behavior for High-Performance Hybrid Supercapacitors

“…The ever-soaring environmental pollution as a result of using fossil fuel and the energy deficiency create an immense necessity to design and develop sustainable energy conversion and storage devices. , However, renewable energy sources are intermittent in nature, necessitating the use of energy storage reservoirs. Supercapacitors (SCs), as an energy storage device, are considered a promising candidate owing to their privileges, including their long life span, eco-friendliness, high power density, good safety, and high rate capability. − The performance of SCs mainly depends on the properties of the electrode’s characteristics, including the morphology, chemical activity, and stability. , In addition, according to electrode material, supercapacitors can be categorized into three main classes: (i) an electric double-layer capacitor (EDLC), which stores charges through physical adsorption/desorption on the electrode surface, (ii) pseudocapacitive that stores charges through reversible surface-controlled Faradaic redox reactions, and (iii) battery-type electrodes that store charges via a diffusion-controlled Faradaic redox reaction. , Both battery-type and pseudocapacitive electrodes exhibit higher capacity than the EDLC counterpart because of their Faradaic redox reactions …”