biostudies-literatureDemeku AMMinistry of Science and Technology, TaiwanMinistry of Education, Taiwan10019-10032https://www.ebi.ac.uk/biostudies/studies/S-EPMC10910445biostudies-literatureUnknown16(8)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 currentACS applied materials & interfacesHigh-Entropy Oxide of (BiZrMoWCeLa)O₂ as a Novel Catalyst for Vanadium Redox Flow Batteries.PMC10910445NSTC 110-2221-E-011-074-MY3Ku HHWang YMHuang ZJWang CHChen GCHsu NYDemeku AMOu YTKabtamu DMfalseHigh-Entropy Oxide of (BiZrMoWCeLa)O₂ as a Novel Catalyst for Vanadium Redox Flow Batteries.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 current2024-01-01T00:00:00Z2024 Feb2025-04-05T11:38:26.161Z2025-04-05T11:38:26.161ZS-EPMC109104453837464710.1021/acsami.3c15783