High-Entropy Oxide of (BiZrMoWCeLa)O₂ as a Novel Catalyst for Vanadium Redox Flow Batteries.

ABSTRACT: In this study, new fluorite high-entropy oxide (HEO), (BiZrMoWCeLa)O₂, nanoparticles were produced using a surfactant-assisted hydrothermal technique followed by calcination and were used as novel catalytic materials for vanadium redox flow batteries (VRFBs). The HEO calcined at 750 °C (HEO-750) demonstrates superior electrocatalytic activity toward V³⁺/V²⁺ and VO²⁺/VO₂⁺ redox couples compared to those of cells assembled with other samples. The charge-discharge tests further confirm that VRFBs using the HEO-750 catalyst demonstrate excellent Coulombic efficiency, voltage efficiency, and energy efficiency of 97.22, 87.47, and 85.04% at a current density of 80 mA cm^-2 and 98.10, 74.76, and 73.34% at a higher current

SUBMITTER: Demeku AM 

PROVIDER: S-EPMC10910445 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature