Controlled and Safe Hydrogen Generation from Waste Aluminum and Water, a New Approach to Hydrogen Generation DOI Open Access
Xavier Salueña Berna, Marc Marín-Genescà,

Ramon Mujal Rosas

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(23), P. 5885 - 5885

Published: Nov. 30, 2024

A new method is proposed to generate hydrogen in situ at low pressure from powder-pressed recycled aluminum turnings activated with small amounts of NaOH and drops water. The contribution this system that the user can obtain flows high-purity (>99%) charge their portable electronic devices remote places, a simple, controlled, safe way, since only water used. Test tubes contain tiny on surface be transported used without contact. In addition being safer system, smaller amount needed compared other systems, there no need preheat water, even heat. As feeding drop by drop, flow easily controlled manual or automatic dosing. waste obtained solid contains mostly hydroxide some impurities origin, which are easy sell recycle. study has been carried out optimize type test establish critical parameters. results show constant controllable rate depending drip frequency where chemical reaction predominates over diffusion, optimal 20 wt%, finer grain size increase H

Language: Английский

A Comprehensive Review of Metal-air Batteries: Mechanistic Aspects, Advantages and Challenges DOI

Madhurima Barman,

Manodip Pal, Rathindranath Biswas

et al.

Catalysis Today, Journal Year: 2025, Volume and Issue: unknown, P. 115229 - 115229

Published: Feb. 1, 2025

Language: Английский

Citations

0
Characteristics of High-Temperature Proton Exchange Membrane Fuel Cells (HT-PEMFCs) Based on Novel Structures on Electrode Surfaces DOI Open Access

Tongbo Qiang,

Weitao Zhang, Qilong Wu

et al.

Materials, Journal Year: 2025, Volume and Issue: 18(6), P. 1232 - 1232

Published: March 10, 2025

The performance of electrodes is the most critical factor determining output characteristics high-temperature proton exchange membrane fuel cells (HT-PEMFCs), and electrode structure directly determines strength mass transfer electrochemical reactions. Therefore, exploring mechanism increasing specific surface area crucial for design structures. In this paper, transport an HT-PEMFC are investigated based on a three-dimensional single-channel model, mathematical model fin established to make comparisons with calculations. results indicate that oxygen mole concentration decreases increase in density. Meanwhile, cell reaches optimal at low operating voltage high density conditions. addition, PEMFC increases aspect ratio. Finally, potential distribution simulation coincides theoretical polarization geometry can significantly support interpretation kinetic obtained from simulations. research result contributes efficient preparation future structures HT-PEMFCs.

Language: Английский

Citations

0
Advances in Nanostructured Electrodes for Solid Oxide Cells by Infiltration or Exsolution DOI Open Access
Miao Dai,

F. Li,

Shujuan Fang

et al.

Materials, Journal Year: 2025, Volume and Issue: 18(8), P. 1802 - 1802

Published: April 15, 2025

Solid oxide cells (SOCs) are highly efficient and versatile devices capable of utilizing a variety fuels, presenting promising solutions for energy conversion renewable resource utilization. There is an urgent need the strategic design robust high-efficiency materials to enhance both efficiencies before SOCs can be applied large-scale industrial production. Nanocomposite electrodes, especially those fabricated through infiltration metal nanoparticle exsolution, have emerged as active electrocatalytic that significantly improve performance durability SOCs. This review systematically summarizes analyzes recent advances in nanoscale architecture electrode via common nanoengineering strategies, including situ with applications CO2/H2O reduction, hydrocarbon electrochemical oxidation, solid fuel cells, reversible operation. Finally, this highlights existing bottlenecks breakthroughs nanotechnologies, aiming provide useful references rational nanomaterials

Language: Английский

Citations

0
Effect of Battery Materials and Catalyst Layer Orientations on the Performance of the Cotton‐Based Al‐Air Battery DOI
Chunmei Liu, Jiaming Gu,

Gaoqiang Lai

et al.

ChemistrySelect, Journal Year: 2025, Volume and Issue: 10(16)

Published: April 1, 2025

Abstract Al‐air batteries (AABs) are potential candidates as next‐generation energy storage devices, due to their high densities and environmental benefits. The cotton‐based AABs exploit the cotton channels transport electrolytes without external pumps. They feasible for application in microelectronics simple electrolyte transportation systems. Until now, effects of battery materials on performance AAB seldom reported. In this work, influences parameters including anode (Al mesh sheet), (cotton cloth medical gauze), cathode (carbon paper graphite paper), catalyst layer orientations evaluated performance. Under conditions Al material, gauze channel absorbent pad, carbon cathode, facing channel, shows an optimal performance, with its peak power density 85.96 ± 1.14 mW cm −2 limiting current 209.33 3.93 mA . stack, which is assembled from two connecting series, can light 70 LEDs.

Language: Английский

Citations

0
Physiochemical and Electrochemical Properties of a Heat-Treated Electrode for All-Iron Redox Flow Batteries DOI Creative Commons
Nitika Devi, Jay N. Mishra, Prabhakar Singh

et al.

Nanomaterials, Journal Year: 2024, Volume and Issue: 14(9), P. 800 - 800

Published: May 5, 2024

Iron redox flow batteries (IRFBs) are cost-efficient RFBs that have the potential to develop low-cost grid energy storage. Electrode kinetics pivotal in defining cycle life and efficiency of battery. In this study, graphite felt (GF) is heat-treated at 400, 500 600 °C, its physicochemical electrochemical properties studied using XPS, FESEM, Raman cyclic voltammetry. Surface morphology structural changes suggest GF °C for 6 h exhibits acceptable thermal stability while accessing benefits heat treatment. Specific capacitance was calculated assessing wettability pristine treated electrodes. The has highest specific 34.8 Fg−1 100 mV s−1, but showed best battery performance. good performance attributed presence oxygen functionalities absence degradation during consisting electrodes offered voltage ~74%, Coulombic ~94%, ~70% 20 mA cm−2. Energy increased by 7% a comparison GF. capable operating charge–discharge cycles with an average ~ 67% over cycles.

Language: Английский

Citations

3
Effect of Sol–Gel Silica Matrices on the Chemical Properties of Adsorbed/Entrapped Compounds DOI Creative Commons
Ariela Burg, Krishna K. Yadav, Dan Meyerstein

et al.

Gels, Journal Year: 2024, Volume and Issue: 10(7), P. 441 - 441

Published: July 2, 2024

The sol-gel process enables the preparation of silica-based matrices with tailored composition and properties that can be used in a variety applications, including catalysis, controlled release, sensors, separation, etc. Commonly, it is assumed silica prepared via synthesis route are "inert" and, therefore, do not affect substrate or catalyst. This short review points out porous affects adsorbed/entrapped species some cases, takes an active part reactions. charged matrix diffusion ions, thus affecting catalytic adsorption processes. Furthermore, recent results point ≡Si-O. radicals long-lived participate redox Thus, clearly, inert as commonly considered.

Language: Английский

Citations

2
Effect of Citric Acid Hard Anodizing on the Mechanical Properties and Corrosion Resistance of Different Aluminum Alloys DOI Open Access
José Ángel Cabral Miramontes, Facundo Almeraya-Calderón,

Ce Tochtli Méndez-Ramírez

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(17), P. 4285 - 4285

Published: Aug. 29, 2024

Hard anodizing is used to improve the anodic films' mechanical qualities and aluminum alloys' corrosion resistance. Applications for oxide coatings on alloys include space environment. In this work, 2024-T3 (Al-Cu), 6061-T6 (Al-Mg-Si), 7075-T6 (Al-Zn) were prepared by hard electrochemical treatment using citric sulfur acid baths at different concentrations. The aim of work observe effect microstructure substrate, properties, resistance, morphology layers. was performed three citric-sulfuric mixtures 60 min current densities 3.0 4.5 A/dm2. Vickers microhardness (HV) measurements scanning electron microscopy (SEM) utilized determine characteristics material, techniques understand kinetics. result indicates that alloy (Al-Mg-Si) has maximum hard-coat thickness hardness. oxidation Zn Mg during process found in promotes formation. Because high copper concentration, layer forms 2024-T6 (Al-Cu) Al lowest thickness, hardness, Citric sulfuric solutions can be provide a variety have resistance par with or better than traditional anodizing.

Language: Английский

Citations

2
Laser Cutting of Titanium Alloy Plates: A Review of Processing, Microstructure, and Mechanical Properties DOI Creative Commons
Ya Zhang, Chunyu Wang,

Wentao Xu

et al.

Metals, Journal Year: 2024, Volume and Issue: 14(10), P. 1152 - 1152

Published: Oct. 9, 2024

The growing use of titanium alloys has led to the gradual replacement traditional processing methods by laser cutting technology, making it preferred method for alloy plates due its high efficiency, precision, and adaptability. In this review, characteristics technology application in plate are summarized, outlining several aspects process, microstructure, mechanical properties material after cutting, along with simulation predictions. Previous research categorized laser-cutting input parameters into beam process parameters, commonly used being power, speed, gas pressure. Various parameter combinations can achieve different qualities, seven indices be evaluate surface roughness slit width serving as most common indices. Different auxiliary gases have shown a significant impact on quality, consisting nitrogen, argon, air. Argon-assisted generally results better quality. Due rapid temperature change, microstructure will undergo non-diffusive martensitic phase transformation during producing heat-affected zone. Experimental studies simulations that occurrence increases hardness residual tensile stress material, which reduces fatigue strength static properties. addition, found more streaks appear cut surface, lower is, cracks arising from stripes. Hence, established analytical solution model three-dimensional finite element effectively predict distribution process. This provide understanding edge stripe formation mechanism, allowing researchers explore mechanism cutting.

Language: Английский

Citations

2
Functionalized γ-Boehmite Covalent Grafting Modified Polyethylene for Lithium-Ion Battery Separator DOI Open Access

Yuanxin Man,

Hui Nan,

Jianzhe Ma

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(9), P. 2162 - 2162

Published: May 6, 2024

In the field of lithium-ion batteries, challenges posed by low melting point and inadequate wettability conventional polyolefin separators have increased focus on ceramic-coated separators. This study introduces a highly efficient stable boehmite/polydopamine/polyethylene (AlOOH-PDA-PE) separator. It is crafted covalently attaching functionalized nanosized boehmite (γ-AlOOH) whiskers onto polyethylene (PE) surfaces. The presence covalent bond increases stability at interface, while amino groups surface separator enhance infiltration electrolyte facilitate diffusion lithium ions. PE-PDA-AlOOH separator, when used in achieves discharge capacity 126 mAh g−1 5 C retains 97.1% after 400 cycles, indicating superior cycling due to its bonded ceramic surface. Thus, interface modification promising strategy prevent delamination coatings

Language: Английский

Citations

1
Solvent-Free Method of Polyacrylonitrile-Coated LLZTO Solid-State Electrolytes for Lithium Batteries DOI Creative Commons
Xuehan Wang, Kaiqi Zhang,

Huilin Shen

et al.

Molecules, Journal Year: 2024, Volume and Issue: 29(18), P. 4452 - 4452

Published: Sept. 19, 2024

Solid-state electrolytes (SSEs), particularly garnet-type Li6.4La3Zr1.4Ta0.6O12 (LLZTO), offer high stability and a wide electrochemical window. However, their grain boundaries limit ionic conductivity, necessitating high-temperature sintering for improved performance. Yet, this process results in brittle prone to fracture during manufacturing. To address these difficulties, solvent-free solid-state with polyacrylonitrile (PAN) coating on LLZTO particles are reported work. Most notably, the PAN-coated (PAN@LLZTO) electrolyte demonstrates self-supporting characteristics, eliminating need sintering. Importantly, homogeneous polymeric PAN coating, synthesized via described method, facilitates efficient Li+ transport between particles. This not only achieves an conductivity of up 2.11 × 10−3 S cm−1 but also exhibits excellent interfacial compatibility lithium. Furthermore, lithium metal battery incorporating 3% PAN@LLZTO-3%PTFE as LiFePO4 cathode remarkable specific discharge capacity 169 mAh g−1 at 0.1 °C. The strategy organic polymer-coated provides possibility green manufacturing preparing room-temperature sinter-free electrolytes, which shows significant cost-effectiveness.

Language: Английский

Citations

1