Nanotechnology for EnergyNanotechnology for Energy

Synthesis, Processing and Manipulation of Nanomaterials and a pu at o o a o ate a s a d

Their Application in Energy Systems

Prof. John WenMechanical & Mechatronics EngineeringMechanical & Mechatronics Engineering

University of Waterloo

Flame Synthesis and CharacterizationFlame Synthesis and Characterization• Third level

– Fourth level carbon nanotubes

» Fifth level

height above base

catalyst

Applications in Energy SystemsApplications in Energy Systems• Third level

– Fourth level

Nano PEM Fuel Cell Nano Supercapacitors

» Fifth level

CNT network (in blue) provides1. Effective support for catalyst (dots)2. Stable porosity and functionality

CNT array (in grey) provides1. Accessible pores for ion storage2. Uniform and tunable pore size3 G t f / l ti3. Great surface-area/volume ratio

4. Super electron transportation3. Great surface-area/volume ratio 4. Super electrical conductivity

Nanofabrication and Nanofabrication and NanojoiningNanojoining• Third level

– Fourth levelCollaborated with Prof. Y. Norman ZhouResearch topics

» Fifth levelp

TiO2 nanowires for solar cells and photocatalytic applicationCarbon nanotubes for chip interconnectionZnO nanowires for optoelectronic devicesZnO nanowires for optoelectronic devicesNanosolders for flexible electronics packaging Energy-saving lamps with

carbon nanotube filaments

Femtosecond laser welded Au nanoparticles

TiO2 nanomembrane ZnO nano-waveguide