Study on the Synthesis and Electrochemical Properties of Nitrogen-Doped Graphene Quantum Dots DOI Open Access
Yongbo Wang, Yanxiang Wang, Dongming Liu

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(24), P. 6163 - 6163

Published: Dec. 17, 2024

Nitrogen-doped graphene quantum dots (N-GQDs) are widely used in biosensing, catalysis, and energy storage due to their excellent conductivity, high specific surface area, unique size effects, optical properties. In this paper, we successfully synthesized N-GQDs using a facile hydrothermal approach investigated the effects of different temperatures times on morphology structure N-GQDs. The results indicated that gradually increased they eventually aggregated into fragments with increasing temperature or reaction time. Notably, at 180 °C for 6 h exhibited most uniform size, an average diameter approximately 3.48 nm, height 5–6 layers, as well favorable fluorescence Moreover, contained abundant oxygen- nitrogen-containing functional groups, which could provide numerous active sites electrode reactions. assembled typical pseudocapacitive behavior exceptional electrochemical performance, achieving capacitance 102 F g−1 current density 1 A g−1. 10,000-cycle test, demonstrated cycling stability retention rate 78.5%, laid foundation practical application electrode. This work applied supercapacitors, offering new insights development field.

Language: Английский

Transition Metal-Mediated Preparation of Nitrogen-Doped Porous Carbon for Advanced Zinc-Ion Hybrid Capacitors DOI Creative Commons
Mingcheng Li, Zheng Liu, Dan Wu

et al.

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(2), P. 83 - 83

Published: Jan. 7, 2025

Carbon is predominantly used in zinc-ion hybrid capacitors (ZIHCs) as an electrode material. Nitrogen doping and strategic design can enhance its electrochemical properties. Melamine formaldehyde resin, serving a hard carbon precursor, synthesizes nitrogen-doped porous after annealing. Incorporating transition metal catalysts like Ni, Co, Fe alters the morphology, pore structure, graphitization degree, nitrogen types/proportions. Electrochemical tests reveal superior capacitance of 159.5 F g-1 at scan rate 1 mV s-1 performance Fe-catalyzed N-doped (Fe-NDPC). Advanced analysis shows Fe-NDPC's high graphitic content boosting electric double-layer (EDLC) pseudocapacitance. Its abundant micro- mesopores increase surface area fourfold compared to non-catalyzed samples, favoring EDLC fast electrolyte transport. This study guides catalyst application materials for supercapacitors, illuminating how influence structure performance.

Language: Английский

Citations

1
Structural Regulation and Performance Enhancement of Carbon-Based Supercapacitors: Insights into Electrode Material Engineering DOI Open Access

Lu Guan,

D. Li,

Shanshan Ji

et al.

Materials, Journal Year: 2025, Volume and Issue: 18(2), P. 456 - 456

Published: Jan. 20, 2025

The development of carbon-based supercapacitors is pivotal for advancing high energy and power density applications. This review provides a comprehensive analysis structural regulation performance enhancement strategies in supercapacitors, focusing on electrode material engineering. Key areas explored include pore structure optimization, heteroatom doping, intrinsic defect engineering, surface/interface modifications. These significantly enhance electrochemical through increasing surface area, improving conductivity, facilitating charge transfer, introducing additional pseudocapacitive reactions, optimizing the states at Fermi level, among other mechanisms. After these fundamental concepts, details various preparation methods their effects supercapacitor performance, highlighting interplay between properties. Challenges scaling advanced fabrication techniques ensuring long-term stability functionalized materials are discussed. Additionally, future research directions proposed, emphasizing cost-effective, scalable interdisciplinary approaches to design next-generation thereby meeting growing demand efficient sustainable storage solutions.

Language: Английский

Citations

1
High-Performance Supercapacitors Using Compact Carbon Hydrogels Derived from Polybenzoxazine DOI Creative Commons
Shakila Parveen Asrafali, Thirukumaran Periyasamy, Jaewoong Lee

et al.

Gels, Journal Year: 2024, Volume and Issue: 10(8), P. 509 - 509

Published: Aug. 2, 2024

Polybenzoxazine (PBz) aerogels hold immense potential, but their conventional production methods raise environmental and safety concerns. This research addresses this gap by proposing an eco-friendly approach for synthesizing high-performance carbon derived from polybenzoxazine. The key innovation lies in using eugenol, ethylene diamine, formaldehyde to create a polybenzoxazine precursor. eliminates hazardous solvents employing the safer dimethyl sulfoxide. An acidic catalyst plays crucial role, not only influencing microstructure also strengthening material’s backbone promoting inter-chain connections. Notably, method allows ambient pressure drying, further enhancing its sustainability. acts as precursor produce two different materials. material produced calcination of PBz is denoted PBZC, gelation PBZGC. structural characterization these materials was analyzed through techniques, such XRD, Raman, XPS, BET analyses. analysis showed increased surface 843 m2 g−1 (PBZGC). electrochemical studies PBZC PBZGC imply that well-defined morphology, along with suitable porosity, paves way conductivity when used electrodes supercapacitors. utilizing heteroatom-doped, aerogel-derived sustainable high-performing alternative traditional energy storage devices.

Language: Английский

Citations

4
Preparation and Applications of Multifunctional MXene/Tussah Silk Fabric DOI Open Access
Bingbing Xu, Yue Zhang, Jia Li

et al.

Materials, Journal Year: 2025, Volume and Issue: 18(1), P. 169 - 169

Published: Jan. 3, 2025

The development of functional textiles has become a key focus in recent years, aiming to meet the diverse requirements modern society. MXene excellent conductivity, hydrophilicity, and UV resistance, is widely used electromagnetic shielding, sensors, energy storage, photothermal conversion. Tussah silk (TS) unique natural textile raw material jewelry luster, luxury, smooth comfortable feel. However, there are relatively few studies on finishing TS fabric with Ti3C2Tx MXene. Here, we developed multifunctional MXene/tussah (MXene/TS) by deposition sheets surface through simple padding–drying–curing process. obtained MXene/TS (five cycles) exhibited conductivity (4.8 S/m), air permeability (313.6 mm/s), ultraviolet resistance (ultraviolet protection factor, UPF = 186.3), conversion (temperature increase 11 °C), strain sensing. Thanks these superior properties, broad application prospects motion monitoring, smart clothing, flexible wearables, artificial intelligence.

Language: Английский

Citations

0
Review of Biomass-Derived Carbon Nanomaterials—From 0D to 3D—For Supercapacitor Applications DOI Creative Commons
Yihong Yan, Weiqiang Sun, Yuyang Wei

et al.

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(4), P. 315 - 315

Published: Feb. 19, 2025

The transition to sustainable energy storage solutions has driven significant interest in supercapacitors, which offer high power density, rapid charge-discharge capabilities, and exceptional cycle stability. Biomass-derived carbon nanomaterials have emerged as compelling candidates for supercapacitor electrodes due their renewable origins, environmental compatibility, cost-effectiveness. This study explores recent advancements tailoring structural properties, example preparation methods activation, are essential efficient charge ion transport. Attention is given the dimensional configurations-spanning 0D 3D structures-and impact on electrochemical behaviors. review outlines challenges faced scaling up optimizing these materials practical applications, alongside an outlook future research directions. By bridging gap between material design application demands, this work contributes advancing technologies a greener future.

Language: Английский

Citations

0
Effect of Metal Electrode and Concentration Redox Couple Effect on Electrical Circuit Parameters for Heterocharge System: Potential Application for Lithium‐Ion Battery DOI
Farid Taherkhani

Electroanalysis, Journal Year: 2025, Volume and Issue: 37(2)

Published: Feb. 1, 2025

The analytical solution has been expanded to describe the circuit parameters of a redox couple with charge +1 and 0 for electrochemical reaction in presence supporting electrolyte as potential application lithium‐ion battery. Gouy–Chapman–Stern theory developed comprehend capacitance behavior function difference electrical between metal ( E eq variable). Finite‐element simulations have employed explore various system configurations, enhancing storage energy by engineering types electrode concentration heterocharge electrolyte. initial guess Randles implemented Matlab code developing, deriving them from current response versus time frequency‐dependent sinusoidal wave function. Subsequently, optimization problem regarding fitting performed through open‐source Python impedance spectroscopy using parameter guess. semianalytical method revealed minimum near zero value variable. Additionally, numerical showed that variable remains constant high concentrations transfer coefficient demonstrated monotonic all reactions occurring on parallel microdisk. A simulation result general trend is consistent available experimental data.

Language: Английский

Citations

0
Exploring the Structural Forms and Catalytic Potential of Carbon Nanomaterials in Metal–Air Batteries DOI Open Access
Z. Li, Yao Hu, Haihui Lan

et al.

Energy Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 28, 2025

Metal–air batteries are highly valued for their exceptional energy efficiency and affordability. Identifying suitable electrode materials is crucial to fully harness potential. Carbon nanomaterials, renowned excellent conductivity, vast specific surface area, robust stability, minimal volume expansion, have emerged as a preferred choice many. However, early characterization techniques struggle precisely pinpoint catalytic active sites across various electrocatalytic reactions, making it challenging comprehend the experimental impact of different site types on these reactions. This has posed significant obstacle unveiling mechanism developing efficient catalysts. With advancements in methods, studies carbon nanomaterials progressed rapidly. Herein, structure nanomaterial catalysts reshaped by researchers improve efficiency, resulting four distinct structural forms: metal‐free carbon–based materials, atomically dispersed metal carbon‐based nanoparticles encapsulated supported materials. In this review, features forms application contexts, detailing synthesis methods effects each form, highlighted. article concludes with an overview recent future directions

Language: Английский

Citations

0
Green Synthesis of ZnO Nanoparticles Using Licania tomentosa Benth (Oiti) Leaf Extract: Characterization and Applications for the Photocatalytic Degradation of Crystal Violet Dye DOI Open Access

M. Thiam,

Aparecido de Jesus Bernardo,

Vanessa de Oliveira Arnoldi Pellegrini

et al.

Processes, Journal Year: 2025, Volume and Issue: 13(3), P. 880 - 880

Published: March 17, 2025

Efficient plant biomass utilization is a key component in advancing sustainable and circular bioeconomy. ZnO nanoparticle synthesis using extracts actively studied as part of this effort. Here, green nanoparticles were prepared Licania tomentosa Benth (also known Oiti) leaf extract. Characterization the produced (NPs) involved X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), Fourier transform infrared (FTIR) UV–Visible (UV-Vis) techniques. Furthermore, we investigated photocatalytic degradation crystal violet (CV) dye catalyzed by obtained NPs evaluated efficiency photodegradation process. The synthesized have an average crystallite size 12.4 nm, measured XRD spherical shape revealed SEM. UV–Vis studies show that relatively small band gap 2.75 eV, estimated Tauc plot. activity tests showed approximately 79% CV decomposed 2 h after being exposed to UV irradiation under experimentally conditions. photodecomposition impacted different factors, such catalyst bandgap loading, pH intensity light. Moreover, optimum photocatalyst loading was determined. Our reveal Oiti extract can be efficiently used for synthesis, which has significant potential applications.

Language: Английский

Citations

0
Removal of protonic doping from PEDOT:PSS by weak base for improving aluminum solid electrolytic capacitor performance DOI Creative Commons
Piao Luo, Kai Zhang,

Nanjie Wu

et al.

RSC Advances, Journal Year: 2025, Volume and Issue: 15(11), P. 8719 - 8728

Published: Jan. 1, 2025

It was found that bases may modulate doping levels by removing proton and improve carrier mobility of PEDOT:PSS.

Language: Английский

Citations

0
Environmentally Sustainable Anode Material for Lithium-Ion Batteries Derived from Cattle Bone Waste: A Full-Cell Analysis with a LiFePO4 Cathode DOI Open Access
Muhammad Shajih Zafar,

Pejman Salimi,

Marco Ricci

et al.

Sustainability, Journal Year: 2025, Volume and Issue: 17(7), P. 3005 - 3005

Published: March 28, 2025

Modern society relies heavily on energy, driving global research into sustainable energy storage and conversion technologies. Concurrently, the increasing volume of waste generated by industrial commercial activities emphasizes need for effective management strategies. Carbonization emerges as a promising solution, converting valuable end products such biochar. This study explores an approach valorizing bone-based food waste, presenting innovative pathways managing escalating issue waste. We investigate carbon derived from cattle bone carbonized at 800 °C (CBW8), to design full-cell lithium-ion batteries (FLIBs). FLIBs featuring CBW8 anode material LiFePO4 cathode exhibit exceptional cycling life, even high current rates. The cell demonstrates specific capacity 165 mAh g−1 0.5 C, maintaining stable performance over 1800 cycles various C-rates. work not only advances field management, but also opens new avenues eco-friendly technological applications.

Language: Английский

Citations

0