Recent progress on novel current collector electrodes for energy storage devices: Supercapacitors

Abstract

Current collectors play a very crucial role in the performance of an energy storage device. Regarding supercapacitors, material design, processing, and current collectors' surface properties can result in substantial variation in energy density, power output, cyclic charge–discharge behavior, and other key performance parameters. Most of the reviews in supercapacitor materials and devices focus on the synthesis, characterization, and electrochemical properties of electrode materials. In the present report, the recent advances in supercapacitor electrodes in conjunction with current collector materials and design are summarized in light of various supercapacitor devices categorized concerning their applications and working mechanisms. It includes the literature documented on multifarious supercapacitors, that is, flow supercapacitors, alternating current line filtering supercapacitors, redox electrolyte‐enhanced supercapacitor, metal ion hybrid supercapacitors, microsupercapacitors, electrochromic supercapacitors, and self‐healing supercapacitors. To the best of authors' knowledge, this is a new and recent summarized report on the development of current collector materials based on intended applications and the working principles of supercapacitors. This article is categorized under: Energy and Development > Science and Materials Energy Research & Innovation > Science and Materials Energy Systems Analysis > Science and Materials

Construction Building Materials as a Potential for Structural Supercapacitor Applications

“…Nickel, aluminum, and copper are the most common metals that can be used as collector plates. [45][46][47] Silver and gold, which also possess good metallic conductivity, have been used as collector plates even though their use is not economical. Corrosion is one of the main problems when using a metallic foil as a collector plate.…”

“…The current selection of collector materials and design of supercapacitor devices based on the intended applications of supercapacitors are shown in Figure 4. [45]…”

“…The important parameters that determine the quality of a supercapacitor include: capacitance, energy density, power density, and specific capacitance. [45] Copyright 2020, Elsevier.…”

“…Due to their high conductivity, different metallic foils, such as nickel, aluminum, and copper, with thicknesses of 20 to 80 μm are used as collector plates in supercapacitors. Nickel, aluminum, and copper are the most common metals that can be used as collector plates [45–47] . Silver and gold, which also possess good metallic conductivity, have been used as collector plates even though their use is not economical.…”

Liquid Metal-Templated Tin-Doped Tellurium Films for Flexible Asymmetric Pseudocapacitors

“…Such intimate contacts are essential to prevent ohmic losses during the charge transfer between the electrochemically active material and the current collector. In addition, the interaction between the electrode material and current collector affects the power delivery rate, efficiency, and extraction of charge in energy storage devices. − Consequently, the approach presented in this paper enables us to fabricate flexible electrodes for supercapacitor devices. The fabricated devices exhibit outstanding energy and power densities and show enhanced chemical and mechanical stability.…”