A5100401619- Fuel Cells and Related Materials
- Electrocatalysts for Energy Conversion
- Advancements in Solid Oxide Fuel Cells
- Advanced battery technologies research
- Dielectric materials and actuators
- Conducting polymers and applications
- Advanced Sensor and Energy Harvesting Materials
- Analytical Chemistry and Sensors
- Advanced Battery Technologies Research
- Ferroelectric and Piezoelectric Materials
- Catalysis and Oxidation Reactions
- Membrane-based Ion Separation Techniques
- Chemical Looping and Thermochemical Processes
- Innovative Energy Harvesting Technologies
- Metal-Organic Frameworks: Synthesis and Applications
- Ionic liquids properties and applications
Idaho National Laboratory
2023-2025
University of Stuttgart
2021-2024
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2021-2024
Hengyang Normal University
2023
State Council of the People's Republic of China
2018
Shandong University
2018
Weihai Science and Technology Bureau
2018
Pennsylvania State University
2007-2014
Tsinghua University
2008-2009
Institute of Microelectronics
2008-2009
The recovery of performance losses in polymer electrolyte membrane fuel cells due to reversible degradation phenomena is an important topic enable high system efficiency, reliable benchmarking and specific material improvement for a given application. Detailed knowledge both, the sources loss corresponding mechanisms, are required achieve cost durability targets cell commercialization. This review paper provides detailed overview mechanisms responsible losses. Moreover, it presents general...
We investigate the energy harvesting with an electrostrictive polymer, possessing high electromechanical response and elastic density, which make it possible to generate electric density attractive for active scheme. It is shown that combining scheme of polymer yields a harvested ∼40mJ∕cm3 10% efficiency.
The recent boom of energy storage and conversion devices, exploiting ionic liquids (ILs) to enhance the performance, requires an in-depth understanding this new class electrolytes in device operation conditions. One central question critical performance is how mobile ions accumulate near charged electrodes. Here, we present excess ion depth profiles ILs ionomer membrane actuators (Aquivion/1-butyl-2,3-dimethylimidazolium chloride (BMMI-Cl), 27 μm thick), characterized directly by...
The durability of polymer electrolyte membrane fuel cells (PEMFCs) needs to be further improved cope with application requirements and economic competitiveness. This article highlights the challenges in reliable determination degradation rates lifetime. evaluation performance is fundamental quantify benchmark allow comparisons between PEMFC tests performed using different materials or laboratories. use efficient recovery procedures enables discrimination reversible irreversible voltage...
To efficiently mitigate the reversible performance degradation of polymer electrolyte membrane fuel cells, it is crucial to thoroughly understand recovery effects. In this work, effect operando by temperature reduction evaluated. The results reveal that in cell from 80 °C 45 yields a 60–70% current density range below 1 A cm−2 shorter time (1.5 h versus 10.5 h), as opposed known and more complex non-operando procedure. Notably, absolute recovered voltage directly proportional total amount...
Abstract Addressing the challenges posed by inferior electrochemical performance at low temperatures and uncertain Faradaic efficiency (FE) represents a pivotal undertaking in development of high efficient proton‐conducting solid oxide electrolysis cells (P‐SOECs). In this work, novel oxygen electrode material BaCo 0.8 Zr 0.1 Zn O 3‐δ (BCZZ) is first designed synthesized. At 600 °C, P‐SOECs with BCZZ achieve an current density 1.98 A cm −2 ≈90% FE 1.3 V. Utilizing 1‐inch as reliable...
This paper presents a silicon-based air-breathing micro direct methanol fuel cell (μDMFC) stack with shared anode plate and two cathode plates. Three kinds of plates featured by different transport methods are designed simulated. Microfabrication technologies, including double-side lithography bulk-micromachining, used to fabricate both silicon on the same wafer simultaneously. μDMFC stacks anodes assembled, characterized single together. Simulation experimental results show that in model...
A one-pot hydrothermal approach has been developed to introduce tetraethylene glycol (TEG) molecules into a two-dimensional (2D) layered lanthanide metal-organic framework ([Sm(H5C2P2O7)(H2O)2]·Guest, denoted SmHEDP-Guest). Through the straightforward loading of TEG, proton conductivity SmHEDP-TEG (1.21 × 10-3 S cm-1) is increased by 3 orders magnitude compared with its analogue SmHEDP-H2O (1.22 10-6 under 100% relative humidity at room temperature. More excitingly, exhibits very high 9.17...
Ionic electroactive polymer (i-EAP) actuators with large strain and low operation voltage are extremely attractive for applications such as MEMS smart materials systems. In-depth understanding of the ion transport storage under electrical stimulus is crucial optimizing actuator performance. In this study, we show dominances diffusion charge perform direct measurements steady state distribution in charged frozen by using Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS). High...
This paper presents a micro direct methanol fuel cell (muDMFC) featured by the novel anode structure with microblocks, which drive from laminar flow toward turbulent flow. Both muDMFC microblocks and regular serpentine-channel one are fabricated using MEMS technologies reliable polydimethylsiloxane (PDMS) assembly method. The performance of prototype is measured compared that muDMFC. Experimental results show has generated maximum power density 8.08 mW/cm <sup...
High elastic energy density and high-efficiency ionic electromechanical actuators were prepared from aligned activated microwave exfoliated graphite oxide (A-aMEGO)/polymer nano-composites, the performance was characterized. The modulus of can be tuned over a wide range by varying polymer (poly (vinylidene fluoride/chlorotrifluoroethylene) [P(VDF-CTFE)]) concentration in nano-composite actuators. A-aMEGO/P(VDF-CTFE) with 35 wt.% content exhibit an higher than 5 J/cm3 conversion efficiency...
Energy and environmental issues have attracted much attention in recent decades. To secure a green sustainable energy future, we need to redesign current systems move from conventional fossil fuels renewable sources. The potential wind solar exceeds global consumption; however, it is not flexible due the intermittent nature of sunlight wind. Thus, robust, cost-effective, technology required efficiently store this energy. Protonic ceramic electrochemical cells (PCECs) are solid-state devices...
This paper reports a micro direct methanol fuel cell (muDMFC) integrated with heater and temperature sensor to realize control. A thermal model for the muDMFC is set up based on heat transfer emission mechanisms. The control system fabricated by using MEMS technologies, assembled polydimethylsiloxane (PDMS) materials Polymethylmethacrylate (PMMA) holders, characterized in two methods, one different currents applied another velocities. work would make it possible enhance performance adjusting...