Work

Advanced Pseudocapacitive Performances of a Ti3C2Tx–ZnOHF/ZnO Nanocomposite for Energy Storage Applications

Year: 2025

Type: article

Abstract: The growing demand for efficient and high‐performance energy storage systems is driving the exploration of novel materials and composites. Traditional electrode materials often face limitations in terms of energy and power densities. This article demonstrates a novel spray‐coated cathode electrode system composed of Ti3C2Tx MXene and zinc hydroxy fluoride/zinc oxide nanostars for energy storage applications in a neutral pH electrolyte (1M Na2SO4), thus avoiding corrosion problems related to water splitting reactions. Optimized Ti3C2Tx‐nanostar electrodes exhibit superior specific capacitance, achieving 236 F g−1 at 5 mV s−1 in cyclic voltammetry and 139 F g−1 at 5 mV s−1 in galvanostatic charge–discharge measurements, which is superior to pure Ti3C2Tx (115 F g−1 at 0.5 A g−1) and pure nanostar (108 F g−1 at 0.5 F g−1) electrodes, used as reference. Additionally, an asymmetric Ti3C2Tx||Ti3C2Tx‐nanostars supercapacitor device achieves a specific capacitance of 147 F g−1 at 0.5 A g−1, an energy density Ed ≈ 46 W h kg−1 at a power density Pd ≈ 875 W kg−1, and the highest Pd ≈ 16 650 W kg−1 at Ed ≈ 14 W h kg−1. These findings demonstrate that zinc oxide nanostars combined with delaminated Ti3C2Tx MXene hold a significant promise for efficient energy storage applications, leveraging the synergy between double‐layer capacitance and pseudocapacitive effects.

Source: ChemSusChem

DOI: 10.1002/cssc.202500024