1) Solar Cell Based on Nanostructured Materials
3) Nanostructured Transition Metal Oxides for Efficient Lithium Ion Intercalation
4) Carbon Cryogel- Hydride Nanocomposites for H2 Storage
Solar Cell Based on Nanostructured Materials
Nanostructured materials possess advantage in electric and optical properties, and when these carefully designed and fabricated nanostructures serve as a photoelectrode film of solar cells, they can effectively improve the energy conversion efficiency by offering a large specific surface area, providing direct pathways for electron transport, or generating light scattering so as to extend the traveling distance of photons within the photoelectrode film. Our study focus on the synthesis of nanostructured oxides and the application of these nanostructures on (1) dye-sensitized solar cells, and (2) hybrid solid-state solar cells that combine inorganic nanostructures with organic polymer materials.
Carbon cryogels (CCs) produced from the polycondensation of resorcinol and formaldehyde that have been processed by freeze drying and followed with pyrolysis in N2 are excellent precursor materials to be used as electrodes in electric double layer supercapacitor. Their tunable nanostructure, high surface area (SA), and good conductivity make them suitable for such application. In our study, a group of carbon cryogels have been synthesized using resorcinol formaldehyde as precursors, and altered via catalysis and activation, to obtain varied nanostructures and pore size distributions.
Nanostructured Transition Metal Oxides for Efficient Lithium Ion Intercalation
Li-ion batteries are powering our daily life: from cellular phones, laptops to hybrid automobile. It works by the repeated conversion between chemical energy and electrical energy. Higher capacity, better cyclic stability and faster charge/discharge rate is our main goal. These electrodes are based on transition metal oxides and consist of four different nanostructures: (1) hierarchical mesoporous Structure, (2) oxide nanotube arrays, (3) metal-oxide core-shell nanocable arrays, and (4) nanocomposites.
Carbon Cryogel- Hydride Nanocomposites for H2 Storage
Hydrogen storage is a key issue in the developing field of hydrogen technology. Despite the recent achievements in synthesizing and investigating novel materials for hydrogen storage, there is neither method nor material that satisfies all the requirements of perceived hydrogen economy. Among the various available approaches, carbon-based nanostructures have attracted considerable attention for solid-state storage of hydrogen1. Carbon cryogels (CCs) are tunable nanoporous amorphous carbon networks with low mass density, which can be generated by sol-gel polycondensation of organic monomers. In addition to tailoring the microstructure of CCs to achieve the desired pore volume and pore size distribution, their surface chemistry can be altered by chemical modification. We have used resorcinol-formaldehyde CCs as nanoscaffold for hydrides. Ammonia borane (AB), a stable, white, crystalline, solid chemical hydride which contains 19.6% hydrogen by weight, is confined inside CCs to synthesize coherent CC- AB nanocomposites .