A5103007963- Fuel Cells and Related Materials
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Conducting polymers and applications
- Transition Metal Oxide Nanomaterials
- Gas Sensing Nanomaterials and Sensors
- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Advanced Battery Technologies Research
- Electrochemical Analysis and Applications
- Advanced Algorithms and Applications
- Supercapacitor Materials and Fabrication
- Advanced Sensor and Energy Harvesting Materials
- Glass properties and applications
- Luminescence Properties of Advanced Materials
- Copper Interconnects and Reliability
- Metal and Thin Film Mechanics
- Photonic Crystals and Applications
- Advanced Condensed Matter Physics
- Plasmonic and Surface Plasmon Research
- Semiconductor materials and devices
- Advancements in Solid Oxide Fuel Cells
- Multiferroics and related materials
Samsung (South Korea)
2016-2017
Seoul National University
2005-2015
Lehigh University
2004
The authors prepared uniformly shaped WO2.72 nanowire bundles using the solvothermal synthesis method. They investigated potential of to be used as a cathode electrode for electrochromic devices and effect Li+ insertion (or extraction) kinetics diffusion Li+. An consisting arrays was formed in an experiment Langmuir-Blodgett technique. one-dimensional nanostructure has high Li-ion coefficient (∼5.2×10−11cm2∕s) low charge transfer resistance (∼28.6Ω), which result its having fast response...
Ionic resistance and double layer capacitance of catalyst (CL) variations with the thickness cathode CL were estimated by electrochemical impedance spectroscopy (EIS) using modified transmission-line model (TLM). 0.1–0.4 mgPt cm−2 commercial 20, 40, 60 wt% Pt/C catalysts used to control thicknesses. The a low Pt C ratio was favorable for maximum power density when loaded ≤0.2 cm−2, high loading ≥0.3 cm−2. surface areas different, whereas utilization these similar. Modified TLM under...
Silicon-based anode materials exhibit higher specific and volumetric capacities than other have therefore received much attention for potential use in lithium-ion batteries. However, the continuous growth of a solid–electrolyte interphase at surface silicon is primary cause chronic capacity fading electrodes. In this paper, we report formation an electrochemically stable layer on surfaces few-layer graphene-coated nanoparticles. During first lithiation, electrolyte molecules were decomposed...
A polybenzimidazole (PBI)-based catalyst-coated membrane (CCM) as a electrode assembly (MEA) in high temperature polymer electrolyte (PEM) fuel cell was fabricated by spraying catalyst ink containing PBI ionomer on both sides of membrane, which then soaked 85% (phosphoric acid, PA). The performance PA-doped CCM two times higher than that conventional substrate MEA, complex process involving fabricating gas diffusion electrodes and hot-pressing process. structure showed improved under...
The electrochromic properties of thin films with a (lithium phosphorous oxynitride) protective layer and an device composed prepared by radio-frequency magnetron sputtering were investigated. film the devices (glass/ITO/) not only showed improved durability continuous potential cycling, but also demonstrated faster bleaching-coloring response rates higher coloration efficiency. Our results that layers are electrochemically stable, enhance Li ion-conducting electrolytes, can be used as for devices.
Ion transport is an important issue in electrochemical-based energy conversion and storage devices. at the interface of electrode electrolyte critical for performance. However, there little understanding phenomena based on ion properties. Here, proton behavior a Nafion membrane (electrolyte) that ionomer catalyst layer (electrode/electrolyte interface) was investigated simultaneously by electrochemical impedance spectroscopy. Our study indicates different from membrane. To elucidate...
The authors deposited iridium tantalum oxide thin films using the reactive cosputtering system. prepared IrTa were characterized X-ray photoelectron spectroscopy, transmission electron microscopy, chronocoloumetry, in situ transmittance measurements, and electrochemical impedance spectroscopy. oxidized was increased by increasing composition of tantalum. Most have high modulation, which is attributed proton conductivity As a result, film shows performance 1.4 s response time, ion diffusion...