A5021599160- Supercapacitor Materials and Fabrication
- Advanced Photocatalysis Techniques
- Advancements in Battery Materials
- MXene and MAX Phase Materials
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Perovskite Materials and Applications
- TiO2 Photocatalysis and Solar Cells
- Electrohydrodynamics and Fluid Dynamics
- Graphene and Nanomaterials Applications
- Recycling and Waste Management Techniques
- Solar-Powered Water Purification Methods
- Advanced Battery Materials and Technologies
- ZnO doping and properties
- Copper-based nanomaterials and applications
- Gas Sensing Nanomaterials and Sensors
- Pickering emulsions and particle stabilization
Office of Energy Efficiency and Renewable Energy
2022
McGill University
2021
University of California, Berkeley
2016-2019
Berkeley Geochronology Center
2015-2019
Abstract While electrochemical supercapacitors often show high power density and long operation lifetimes, they are plagued by limited energy density. Pseudocapacitive materials, in contrast, operate fast surface redox reactions shown to enhance storage of supercapacitors. Furthermore, several reported systems exhibit capacitance but restricted voltage windows, usually no more than 1 V aqueous electrolytes. Here, it is demonstrated that vertically aligned carbon nanotubes (VACNTs) with...
Abstract The growth of large and high‐quality 2D nanomaterials is challenging due to the formation defects from dislocations, disinclinations, symmetry‐breaking instabilities. In this study it demonstrated that biological template can be utilized align molecular orientation for grain size in synthesis silver nanostructure. solvent assisted multilayering phenomenon hydrogel forms at air/gel interface supports salts grow laterally largely a manner between scaffold layers with nominal thickness...
We present titanium nitride (TiN) coated carbon nanotube (CNT) forest electrodes by means of atomic layer deposition (ALD) to store charges in the electrochemical supercapacitors for first time. The specific achievements as compared with state-of-art supercapacitor include: (1) 400 times higher capacitance than a flat-shape electrode; (2) conformal and uniform coating TiN; (3) greater 500% enhancement at 81mF/cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...
Photocatalytic water splitting represents an emerging technology well positioned to satisfy the growing need for low-energy, low CO 2 , economically viable hydrogen gas production. As such, stable, high-surface-area electrodes are increasingly being investigated as photochemical conversion of solar energy into fuel. We present a titanium dioxide (TiO )/zinc oxide (ZnO) nanowire array using hybrid hydrothermal/atomic layer deposition (ALD) use solar-powered photoelectrochemical device. The...
We present a Titanium Dioxide (TiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> )/Zinc Oxide (ZnO) nanowire array based on fabrication process using hybrid hydrothermal/atomic layer deposition (ALD) for use as solar-powered hydrogen gas (H ) harvester. Three advancements have been accomplished in this work: (1) high aspect ratio TiO nanowires (over 8μm), (2) improved stability over bare ZnO Nanowires during photocatalysis, and (3)...
This work presents the synthesis, assembly, and integration of two-dimensional (2D) phosphate sheets Lithium-ion energy storage devices. Three achievements have been accomplished in this work: (1) synthesis assembly 2D, poly-crystalline greater than 50μm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> area, (2) 3x improved capacitance an Iron-Phosphate-Polypyrrole battery/supercapacitor (3.6 mF/cm2) over bare Polypyrrole (PPY) films, (3)...
Electrochemical capacitors (EC) or so-called supercapacitors are emerging class of electrochemical energy storage, which demonstrate high power densities and moderate densities. ECs proved to be highly beneficial in different storage systems such as smart grids. To increase density, pseudocapacitive materials (i.e., transition metals) that take advantage fast reversible surface Faradaic reactions for the accommodation charges utilized. Among various metal compounds, RuO <inf...
This work presents the first demonstration of atomic layer deposited (ALD) black titania (TiOx), to best our knowledge. By fabricating b-TiOx using ALD we have accomplished four distinct achievements: (1) development a direct deposition method b-TiOx, without need for deoxygenation annealing, as required by current fabrication processes; (2) ability deposit onto highly porous materials with Ångstrom-level precision; (3) increased response solar spectrum over TiO <sub...
We present thiopene-based devices made by spincoating and electropolymerization for usage in solarpowered, photocatalytic hydrogen gas (H <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> ) harvesting. Two innovative claims achieved this work include: (1) first demonstration of electropolymerized photoelectrochemical water splitting, (2) drastically improved performance EP-PEC over spin-coated PEC H harvesters, achieving >0.5V improvement...
Biological template can be utilized to align the molecular orientation for large grain size in synthesis of high-quality two-dimensional silver nanostructure. The multi-layering phenomenon hydrogel forms biological at air/gel interface and supports salts grow laterally largely a manner between scaffold layers with nominal thickness 4.4 ± 0.3 nm. This is reported by Doyoung Byun, Liwei Lin co-workers article number 1701491.