Composite Assembling of Oxide-Based Optically Transparent Electrodes for High-Performance Asymmetric Supercapacitors

Abstract

Simultaneously achieving a transparent and high-energy density supercapacitor is a major challenge because of the trade-off between energy storage capacity and optical transparency of active electrode materials. Herein, we demonstrate a novel approach to construct an optically transparent asymmetric supercapacitor (Trans-ASC) by assembling positive (ZnO−SnO 2 ) and negative (TiO 2 −SnO 2 ) composite thin-film electrodes on a conductive indium-doped tin oxide substrate via reactive DC magnetron cosputtering. The optical transmittance for both composite thin films is found to be 68% (ZnO−SnO 2 ) and 64% (TiO 2 −SnO 2 ). Furthermore, electrochemical kinematics of the primed transparent electrodes are scrutinized in 0.5 M KOH electrolyte without affecting the transparency of active electrodes. The structural reliability of the electrodes aids the superb electrochemical performance to construct a Trans-ASC, TiO 2 −SnO 2 //ZnO−SnO 2 , which works at a voltage of +1.2 V and attains a higher areal capacitance of 44.6 mF cm −2 at 2 mA cm −2 . The assembled Trans-ASC delivers a maximum areal energy density of 8.75 μW h cm −2 with an optimal areal power density of 570 μW cm −2 . Additionally, the capacitance retention of 81.6% and transparency of both electrodes remain almost the same (up to 60% for ZnO−SnO 2 and 62% for TiO 2 −SnO 2 ) even after 10,000 charging−discharging cycles. These remarkable electrochemical properties and outstanding cycling stability of the designed Trans-ASC device make it a potential candidate for storing energy and for further use in transparent electronic devices.

Hydrothermal synthesis and characterization of the antimony–tin oxide nanomaterial and its application as a high-performance asymmetric supercapacitor, photocatalyst, and antibacterial agent

“…The well extended intensity peaks indicate the polycrystalline nature and size reduction of ATO. 22 All the identified ATO nanoparticle peaks are in good agreement with the JCPDS card number 73-2141 and LCSD card number 4242. It clearly indicates the formation of hexagonal structured ATO.…”

Mn Incorporated CeO2 Lattice Endorsement of Electrochemical Performance in Symmetric Supercapacitor Device

“…The SC has various advantages over batteries, as it offers higher power densities, faster charging time, and longer cycling life. [1][2][3][4][5][6][7][8][9][10] As with batteries, SC devices are also composed of four main parts: positive and negative electrodes, a separator, and a suitable electrolyte. SC performance and cost are largely determined by electrode materials out of these four components.…”

Investigation of Supercapacitor Electrodes Based on MIL-101(Fe) Metal-Organic Framework: Evaluating Electrochemical Performance through Hydrothermal and Microwave-Assisted Synthesis

“…This shift has intensified the research efforts towards the development of advanced sustainable energy storage devices [3]. Supercapacitors (SCs) are among the most promising energy storage devices due to their high power density [4][5][6][7][8]. However, their low energy density presents a major challenge to their commercialization.…”