摘要:
Compositions and devices for harvesting electrical energy from mechanical and thermal energy, storing such produced energy, and sensing strain based on low cost materials and processes. In embodiments, the compositions are flexible and include a flexible polymer embedded and coated with a nanostructured piezoelectric material.
摘要:
In some embodiments, the present disclosure pertains to energy storage compositions that comprise a clay and an ionic liquid. In some embodiments, the clay is a bentonite clay and the ionic liquid is a room temperature ionic liquid (RTIL). In some embodiments, the clay and the ionic liquid are present in the energy storage compositions of the present disclosure in a weight ratio of 1:1. In some embodiments, the ionic liquid further comprises a lithium-containing salt that is dissolved in the ionic liquid. In some embodiments, the energy storage compositions of the present disclosure further comprise a thermoplastic polymer, such as polyurethane. In some embodiments, the thermoplastic polymer constitutes about 10% by weight of the energy storage composition. In some embodiments, the energy storage compositions of the present disclosure are associated with components of energy storage devices, such as electrodes and separators. In some embodiments, the energy storage compositions of the present disclosure are associated with an energy storage device, such as a battery or a capacitor.
摘要:
Embodiments of the invention relate to energy storage devices, e.g., capacitors and batteries, that may include a composite article of elongated conductive structures embedded in a polymer matrix. In some embodiments, a liquid containing ionic species may be dispersed within the polymer matrix of the article. The liquid may contact the elongated conductive structures within the polymer matrix. When the composite article is used as an energy storage device, the large surface area at the interface between the elongated conductive structures and the liquid can provide high energy storage. Embodiments of the invention enable storing energy using a composite article that exhibits both high and low temperature stability, high cyclic repeatability, and mechanical flexibility. The composite article can also be non-toxic, biocompatible and environmentally friendly. Thus, the composite article may be useful for a variety of energy storage applications, such as in the automotive, RFID, MEMS and medical fields.
摘要:
Metal/metal oxide nanoparticle-embedded polymer films were synthesized in situ wherein the polymerizing agent was utilized for both reduction and polymerization (such as curing). This in situ method avoids the use of any external reducing agent/stabilizing agent and leads to a uniform distribution of nanoparticles in the polymer matrix. In some embodiments, additional heating can be utilized to form the nanoparticles embedded in the polymer film.
摘要:
Aligned carbon nanotube-polymer composite materials, systems and methods include a substrate that carries an adhesive coating thereon. A plurality of carbon nanostructures are adhered to the substrate by the adhesive coating, such that the nanostructures are formed into a predetermined architecture, such that the architecture of the nanostructures defines at least one orientation for a plurality of nanostructures, and defies the approximate spacing between the nanostructures and/or groups of nanostructures. The adherence of the carbon nanostructures in the adhesive coating stabilizes the predetermined architecture of the nanostructures, such that the architecture renders the composite material superhydrophobic.
摘要:
The invention is directed to carbon nanostructure composite systems which may be useful for various applications, including as dry adhesives, self-cleaning applications, electronics and display technologies, or in a wide variety of other areas where organized nanostructures may be formed and integrated into a flexible substrate. The present invention provides systems and methods wherein organized nanotube structures or other nanostructures are embedded within an adhesive, with the properties and characteristics of the nanotubes or other nanostructures exploited for use in various applications. In one aspect, the invention is directed to a self-cleaning carbon nanotube composite material that includes a substrate, an adhesive coating on at least a portion of the substrate, a plurality of carbon nanostructures formed into a predetermined architecture, each of the plurality of nanostructures having a substantially predetermined width and length, and the architecture of the plurality of nanostructures defining at least one orientation for a plurality of nanostructures, and defining the approximate spacing between nanostructures and/or groups of nanostructures, the carbon nanostructures architecture being at least partially adhered to the adhesive coating on the substrate in a manner that the architecture is stabilized in the predetermined architecture, wherein the carbon nanostructures architecture renders the composite material superhydrophobic.
摘要:
An optical absorber includes vertically aligned carbon nanotubes with an ultra-low reflectance less than 0.16% and an absorption efficiency greater than 99.84%. The index of refraction and the absorption constant are controlled by independently varying the nanotube diameter and nanotube spacing. The nanotubes are mostly double-walled. The density of the nanotube arrays is very low, around 0.015 g/cm3.
摘要翻译:光吸收器包括垂直排列的碳纳米管,超低反射率小于0.16%,吸收效率大于99.84%。 通过独立地改变纳米管直径和纳米管间距来控制折射率和吸收常数。 纳米管主要是双壁的。 纳米管阵列的密度非常低,约为0.015g / cm 3。
摘要:
A flash CVD process can be employed to grow micron- and nano-sized tree-like structures, particularly carbon structures on graphite electrodes. This process involves fast cyclic resistive heating of electrodes in an atmosphere of inert gas and hydrocarbons at below atmospheric pressure.
摘要:
The invention is directed to carbon nanostructure composite systems which may be useful for various applications, including as dry adhesives, electronics and display technologies, or in a wide variety of other areas where organized nanostructures may be formed and integrated into a flexible substrate. The present invention provides systems and methods wherein organized nanotube structures or other nanostructures are embedded within polymers or other flexible materials to provide a flexible skin-like material, with the properties and characteristics of the nanotubes or other nanostructures exploited for use in various applications. In one aspect, the invention is directed to a carbon nanotube/polymer composite material having a plurality of carbon nanotubes formed into a predetermined architecture, with each of the plurality of nanotubes having a desired width and length. The architecture of the plurality of nanotubes defines at least one orientation for a plurality of nanotubes, and also defines the approximate spacing between nanotubes and/or groups of nanotubes. The carbon nanotube architecture is at least partially embedded with a polymer matrix in a manner that the architecture is stabilized in the predetermined architecture. The polymer matrix may also be formed to have a desired predetermined thickness.
摘要:
A method of controllably aligning carbon nanotubes to a template structure to fabricate a variety of carbon nanotube containing structures and devices having desired characteristics is provided. The method allows simultaneous, selective growth of both vertically and horizontally controllably aligned nanotubes on the template structure but not on a substrate in a single process step.