Optimized Fabrication of Supercapacitor Using MOF-Derived NiCo₂O₄ with Porous Carbon as Cathode: Electrochemical Characterization and Stability Analysis using Time Series Analysis Technique

ACS Applied Electronic Materials, Journal Year: 2024, Volume and Issue: 6(6), P. 4369 - 4380

Published: June 5, 2024

This study utilizes metal–organic framework (MOF)-derived NiCo2O4 with porous carbon (PC) as the cathode to fabricate both symmetric and asymmetric supercapacitor devices an optimized anode (NiCo2O4/PC, activated (AC), polyaniline (PANI)) aqueous electrolytes. Initially, NiCo2O4/PC material was synthesized from a bimetallic–organic (NiCo-BTC MOF) using carefully thermal conditions. Following comprehensive characterizations, employed in fabrication of solid-state by meticulously selecting electrode–electrolyte pair maximize performance. To achieve this, electrochemical characterizations NiCo2O4/PC/NF (NF: Ni foam) were carried out various The 1.0 M potassium hydroxide (KOH) electrolyte demonstrated most promising performance for composite. Subsequently, KOH-based gel evaluate three devices. These included two devices, NiCo2O4/PC/NF–AC/NF NiCo2O4/PC/NF–PANI/NF, well one device, NiCo2O4/PC/NF–NiCo2O4/PC/NF. Notably, NiCo2O4/PC/NF–PANI/NF device exhibited energy density almost 3.23 3.78 times higher than those NiCo2O4/PC/NF-NiCo2O4/PC/NF respectively. long-term stability system, analyzed over 2000 charge–discharge cycles time series analysis, reveals insights into its behavior extended duration. illustrated efficacy PANI (instead AC) MOF-derived material. Furthermore, aforementioned high-performing integrated power LED, demonstrating practical applicability.

Language: Английский

Optimization of cobalt-based MOFs for super-capacitor electrode materials of new energy vehicle

Heliyon, Journal Year: 2024, Volume and Issue: 10(10), P. e31222 - e31222

Published: May 1, 2024

Super-capacitors (SCs), as new energy conversion storage elements, have attracted much attention, but there is still a research gap in the design of electrode materials. In this study, optimization scheme Metal-Organic Frameworks (MOFs) and cobalt-based MOF composites materials for SCs vehicles explored, series experiments are conducted to evaluate their performance. Scanning Electron Microscope (SEM) images reveal that surface morphology particles with uniform distribution. The electrochemical performance test results show specific capacitance higher than sum two individual presents remarkable increase scanning rate. Additionally, constant current charge-discharge test, exhibit longest time good symmetry. Electrolyte particle contact tests samples at different preparation temperatures display high-temperature better structural stability electrolyte ion contact. Cyclic Voltammetry (CV) Galvanostatic Charge Discharge (GCD) tests, 250 °C sample demonstrates best properties highest (269 F/g). Moreover, density increases, 600 decreases lower rate, showing stronger stability. However, use may pose environmental safety risks, such impact cobalt resource mining, instability under conditions, possible production hazardous substances. Therefore, these factors need be fully considered when designing using ensure friendliness MOFs. These provide an important reference selecting optimizing vehicles. Furthermore, study offers suggestions improving materials, filling gaps related fields, supporting further development SC technology.

Language: Английский

Chitosan-Functionalized Lithium Iron Oxide Nanoparticles for Magnetic Hyperthermia Applications

Langmuir, Journal Year: 2024, Volume and Issue: 40(49), P. 25902 - 25918

Published: Nov. 22, 2024

In this study, various compositions of α-Fe

Language: Английский