Alternative fuel vehicles typically require large energy stores (e.g., for acceleration), resulting in the ongoing development of capacitor and supercapacitor technologies. These technologies have a broad range of applications including portable electronic devices such as cell phones, lap top computers and personal digital assistants and are not limited to use in automobiles.
Electrochromic coatings are also being developed in an effort to promote energy savings. Applications include energy efficient, dynamically controlled “smart” windows, sunroofs, and opto-electronic “shutters.” A variable transmittance window coating operated as part of an intelligent building energy management system can provide substantial energy savings. In particular, electrochromic windows may be used to control solar heat gain through windows and thereby reduce energy requirements.
Inorganic electrochromic coatings operate by insertion of ionic species into a host lattice to effect changes in the optical properties. For example, amorphous tungsten oxide films appear transparent. Injecting lithium (or hydrogen) ions and electrons causes the film to absorb light and the color of the film to take on a dark blue appearance.
Scientists at the National Renewable Energy Laboratory (NREL) have developed a method of producing a nano-composite material by co-sputtering a transitional metal and a refractory metal in a reactive atmosphere. This method can also be used to co-deposit a transition metal and a refractory metal composite structure on a substrate, or thermally anneal the deposited transition metal and refractory metal composite structure in a reactive atmosphere.
· Higher specific capacitance
· Better conductivity
· Increased lifetime for thin film
Applications and Industries
· Nano-composite materials
· Electric vehicles
· Electrochromic windows
· Capacitors and supercapacitors
· Portable electronics
Patents and Patent Applications
|Title and Abstract||
Nano-composite materials are disclosed. An exemplary method of producing a nano-composite material may comprise co-sputtering a transition metal and a refractory metal in a reactive atmosphere. The method may also comprise co-depositing a transition metal and a refractory metal composite structure on a substrate. The method may further comprise thermally annealing the deposited transition metal and refractory metal composite structure in a reactive atmosphere.
|National Renewable Energy Laboratory||05/25/2010
|Technology ID||Development Stage||Availability||Published||Last Updated|
|NREL ROI 04-35||Production||Available||12/17/2015||12/17/2015|