Modulating energy storage and electrocatalytic properties of molybdates through forming solid solutions

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160273 - 160273

Published: Feb. 1, 2025

Language: Английский

Microwave-Assisted Doping Engineering Construction of Spinel-Structured Nonstoichiometric Manganese Cobaltite with Mixed 1D/2D Morphology for Supercapacitor Application

Molecules, Journal Year: 2025, Volume and Issue: 30(4), P. 873 - 873

Published: Feb. 14, 2025

High-performance electrode materials are fundamental to improving supercapacitor performance, serving as key factors in developing devices with high energy density, power and excellent cyclic stability. Non-stoichiometric spinels phase deficiencies can achieve electrochemical performance that surpasses of stoichiometric materials, owing their unique structural characteristics. In this study, we used a microwave-assisted method synthesize high-performance non-stoichiometric spinel material deficiencies, Mn0.5Co2.5O4, which displayed wide potential window (1.13 V traditional aqueous three-electrode system) specific capacitance (716.9 F g-1 at 1 A g-1). More critically, through doping engineering, nickel was successfully doped into the phase-deficient resulting material, Ni-Mn0.5Co2.5O4, significant lattice defects mixed 1D/2D morphology. The effectively promoted high-state conversion manganese valence states within cobaltite substantially increasing quantity highly active Co3+ ions. These changes led an increase density reactive sites, promoting synergistic interactions, thereby significantly enhancing material's conductivity storage performance. Ni-Mn0.5Co2.5O4 reached 1180.6 g-1, 64.7% improvement over original Mn0.5Co2.5O4; current 10 increased by 14.3%. Notably, charge transfer resistance reduced factor 41.6. After 5000 cycles testing, capacity retention stood 79.2%. This work reveals effectiveness engineering constructing spinel-type bimetallic oxide offering advanced strategies for development materials.

Language: Английский

Rational Design of V−ZnCo2O4 Nanowires on Nickel Foam: Achieving Superior Capacitance and Mechanical Resilience

Molecules, Journal Year: 2024, Volume and Issue: 29(23), P. 5738 - 5738

Published: Dec. 5, 2024

The structural characteristics of electrode materials play a crucial role in their potential applications. Therefore, designing the material's structure rationally is one most effective methods to achieve high-performance electrodes. In this study, V-ZnCo

Language: Английский