A5032076841- Fuel Cells and Related Materials
- Conducting polymers and applications
- Electrocatalysts for Energy Conversion
- Analytical Chemistry and Sensors
- Advancements in Solid Oxide Fuel Cells
- Membrane-based Ion Separation Techniques
- Advanced battery technologies research
- Electrochemical Analysis and Applications
- Polymer Nanocomposites and Properties
- Electrochemical sensors and biosensors
- Polymer composites and self-healing
- Perovskite Materials and Applications
- Structural Analysis and Optimization
- Advanced Sensor and Energy Harvesting Materials
- Electronic Packaging and Soldering Technologies
- Extraction and Separation Processes
- Synthesis and properties of polymers
- Supercapacitor Materials and Fabrication
- Aeroelasticity and Vibration Control
- Quantum Dots Synthesis And Properties
- Polymer crystallization and properties
- Photopolymerization techniques and applications
- Neutrophil, Myeloperoxidase and Oxidative Mechanisms
- Glass properties and applications
- Chemical Synthesis and Characterization
Hubei University
2015-2024
Northwestern Polytechnical University
2021-2024
Nanjing Tech University
2024
Ministry of Industry and Information Technology
2024
Wuhan University of Technology
2004-2023
DEVCOM Army Research Laboratory
2022
United States Army Combat Capabilities Development Command
2022
Los Alamos National Laboratory
1995-2017
Beihang University
2007-2015
North Dakota State University
2007
Direct methanol fuel cells (DMFCs) using Pt‐Ru electrocatalysts and perfluorosulfonic acid membranes provide high performances if operated above 100°C with optimized catalyst layers. A decal transfer method is used to apply thin‐film catalyst/ionomer composite layers Nation® membranes. Nation 112 membrane/electrode assembly operating on 5 atm oxygen at 130°C yields a current of 670 mA/cm2 0.5 V cell voltage. Peak power density 400 mW/cm2. The same 3 air 110°C 370 provides maximum 250
This paper describes methanol flux measurements across Nafion, 1100 equivalent weight membranes under conditions of a direct fuel cell but in which is completely electro‐oxidized on the opposite side an inert atmosphere at sufficiently high electrode potential. Both diffusion coefficient and concentration membrane were determined from measured transient limiting current density following potential step. Corrections for electro‐osmotic drag effects are developed found necessary even low MeOH...
This paper compares direct methanol fuel cells (DMFCs) employing two types of Nafion® (E.I. DuPont de Nemours and Company) membranes different equivalent weight (EW). Methanol water uptakes in 1100 1200 EW Nafion were determined by weighing solution‐equilibrated membranes. Both the membrane about 70–74% those membrane. The crossover rate corresponding to that a DMFC at open circuit was measured using voltammetric method configuration under same cell operating conditions. After accounting for...
The performance of polyaniline‐based electrochemical capacitors was evaluated under various experimental conditions. capacitor consisted two platinized tantalum foils coated with polyaniline as the active material, a separator, and an appropriate aqueous electrolyte solution. coatings were formed galvanostafically from 0.1 M aniline +1.0 HCl With loading by deposition charge on each electrode solution for optimized capacitor, energy power densities (of polymer) achieved, respectively. Cyclic...
Direct methanol fuel cells (DMFCs) using poly(perfluorosulfonic acid) membranes were used to determine the water electro-osmotic drag coefficients in these ionomeric membranes. In a DMFC fed with 1.0 M aqueous at anode and dry cathode, membrane can be fully equilibrated on both sides liquid sufficiently high current density. this special situation, flux across from cathode is driven by protonic exclusively. From measurements performed membranes, of all increase temperature. Compared hydrated...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIon transport in polypyrrole and a polypyrrole/polyanion compositeXiaoming Ren Peter G. PickupCite this: J. Phys. Chem. 1993, 97, 20, 5356–5362Publication Date (Print):May 1, 1993Publication History Published online1 May 2002Published inissue 1 1993https://pubs.acs.org/doi/10.1021/j100122a029https://doi.org/10.1021/j100122a029research-articleACS PublicationsRequest reuse permissionsArticle Views1353Altmetric-Citations183LEARN ABOUT THESE...
A direct methanol fuel cell (DMFC) employing a proton conducting membrane was used to determine the electro‐osmotic drag coefficient of water in ionomeric membrane. Water flux across such (operated with 1.0 M aqueous at anode and dry cathode) is driven by protonic exclusively sufficiently high current densities. This evidenced experimentally linear relationship between measured crossing Application DMFC for water‐drag measurements significantly simpler than approach described us before,...
The ionomer content in catalyst layers has a marked influence on direct methanol fuel cell (DMFC) performance. In an anode which contains unsupported PtRu as the catalyst, recast may not always be necessary because protonic conductivity of hydrous RuOx, presence is inferred from X‐ray diffraction pattern, sufficient to allow effective utilization sites. To examine interpenetration and membrane material possible explanation for lack apparent need added ionomer, ultramicrotomed thin sections...
All-inorganic CsPbI3 perovskites have great potential in tandem cells combination with other photovoltaic devices. However, perovskite solar (PSCs) still face a huge challenge, resulting low power conversion efficiency (PCE) relative to organic-inorganic PSCs. In this work, we introduced tetrabutylammonium acetate (TBAAc) as buffer layer between the SnO2 electron-transport (ETL) and all-inorganic film interface for first time. TBAAc not only improved conductivity of ETL but also formed 1D...
The ionic and electronic conductivities of poly-[1-methyl-3-(pyrrol-1-ylmethyl)pyridinium perchlorate] have been measured as a function potential in various solvents by impedance spectroscopy. conductivity this polymer shows strong solvent dependence, ranging from 0.31 mS cm–1 water to 8.0 µS propylene carbonate. By changing the potential, ratio for has varied 1 1, allowing thorough exploration validity dual resistance transmission line model polymer. Overall, experimental results support...
The electronic and ionic conductivities of poly‐(3‐methylpyrrole‐4‐carboxylic acid) have been measured in situ by twin electrode voltammetry impedance spectroscopy, respectively. conductivity this polymer, ca. 10−2(Ω cm)−1, is about 1000 times higher than its conductivity, allowing application a simple transmission line circuit to model ion transport within the polymer. Under almost all conditions investigated response was similar that unambiguous measurements polymer's could be obtained....
Abstract Sub‐nanometric materials (SNMs) represent a series of unprecedented size‐/morphology‐related properties applicable in theoretical research and diverse cutting‐edge applications. However, in‐depth investigation wide utilization organic SNMs are frequently hindered, owing to the complex synthesis procedures, insufficient colloidal stability, poor processability, high cost. In this work, low‐cost, energy‐efficient, convenient, effective, scalable method is demonstrated for directly...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and Characterization of Poly(3-arylthiophene)sDouglas J. Guerrero, Xiaoming Ren, P. FerrarisCite this: Chem. Mater. 1994, 6, 8, 1437–1443Publication Date (Print):August 1, 1994Publication History Published online1 May 2002Published inissue 1 August 1994https://doi.org/10.1021/cm00044a049RIGHTS & PERMISSIONSArticle Views347Altmetric-Citations71LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum full text article...
Abstract Melt mixing in an extruder with polymers is effective approach for forming nanocomposites, allowing mass production applications. The intent of this study to investigate carbon nanofiber composites ultrahigh molecular weight polyethylene (UHMWPE) matrix using the twin‐screw extruder. To decrease high viscosity UHMWPE, a low density (LDPE) was added into UHMWPE. effects nanofibers (CNFs) on crystalline structures and properties nanocomposites were analyzed. differential scanning...
Abstract By using the aerodynamic levitation and laser melting technique to well extend glass‐forming region into Mg‐rich peraluminous regime, a series of magnesium aluminosilicate glasses were prepared investigate Mg Al mixed effects on thermal properties, including glass transition temperature ( T g ), crystallization behavior, stability. With gradual substitution by Al, exhibits two types near‐linear rises with different slopes in compositional regions separated r = 0.57, where is equal...
A bifunctional catalyst derived from leather waste for use in zinc–air batteries.