A thermoelectric material comprising carbon nanotubes and lignin. The carbon nanotubes are present as fibres and the lignin is present in pores and/or voids in the carbon nanotube fibres. The lignin may act as a dopant to increase the thermoelectric efficiency of the carbon nanotubes, multi-walled carbon nanotubes in particular. A method of forming a thermoelectric material involving impregnating fibres of carbon nanotubes with lignin, is also provided. A thermoelectric element, a fabric and a thermoelectric device comprising the thermoelectric material are also provided. The thermoelectric material may be particularly useful for the production of wearable thermoelectric devices.

A thermoelectric device includes a semiconductor stacked thermoelectric thin film including a first high-purity layer composed of SiGe as a main material and a composite carrier supply layer formed on the first high-purity layer. The composite carrier supply layer includes a second high-purity layer and third high-purity layer composed of Si as a main material, and a carrier supply layer held between the second and third high-purity layers and composed of SiGe as a main material. The carrier supply layer is a P-type carrier supply layer to which an additive of a group XIII element is added or a N-type carrier supply layer to which an additive of a group XV element is added.

Embodiments relate to methods of manufacturing and operating nano-scale energy converters and electric power generators. The nano-scale energy converters include two electrodes separated a predetermined distance. The first electrode is manufactured to have a first work function value. The second electrode is manufactured to have a second work function value different from the first work function value. A cavity is formed between the first and second electrodes, and a nanofluid is disposed in the cavity. The nanofluid includes a plurality of nanoparticles, with the nanoparticles having a third work function value that is greater than the first and second work function values. The relationship of the work function values of the nanoparticles to the work function values of the electrodes optimizes transfer of electrons to the nanoparticles through Brownian motion and electron hopping.

A thermoelectric device includes each an n-type thermoelectric leg and a p-type thermoelectric leg electrically coupled by an electrical contact. At least one of the n-type and p-type thermoelectric legs contains a particulate semiconductor mixed with hollow microspheres. The hollow microspheres may make up between 40% and 90% by volume of the thermoelectric leg. Adjacent thermoelectric couples may be electrically coupled by a second electrical contact. The thermoelectric legs may be printed by deposition of an ink.

A method for obtaining copper arsenic chalcogen derived nanoparticles, including selecting a first precursor material from the group comprising copper, arsenic, antimony, bismuth, and mixtures thereof, selecting a second material from the group comprising sulfur, selenium, tellurium, and mixtures thereof, and then reacting both precursors in a solvent medium at conditions conducive to the formation of copper arsenic chalcogen derived nanoparticles.

A method of producing a shaped product for a thermoelectric conversion element is provided. The method comprises: mixing a coarse mixture that contains metal nanoparticle-supporting carbon nanotubes, a resin component, and a solvent by dispersion treatment that brings about a cavitation effect or a crushing effect, to obtain a composition for a thermoelectric conversion element; and removing the solvent from the composition for a thermoelectric conversion element.

A thermoelectric conversion material contains a matrix composed of a semiconductor and nanoparticles disposed in the matrix, and the nanoparticles have a lattice constant distribution Δd/d of 0.0055 or more.

A small-scale thermoelectric power generator and combustion apparatus, components thereof, methods for making the same, and applications thereof. The thermoelectric power generator can include a burner including a matrix stabilized combustion chamber comprising a catalytically enhanced, porous flame containment portion. The combustion apparatus can include components connected in a loop configuration including a vaporization chamber; a mixing chamber connected to the vaporization chamber; a combustion chamber connected to the vaporization chamber; and a heat exchanger connected to the combustion chamber. The combustion chamber can include a porous combustion material which can include a unique catalytic material.

Embodiments relate to methods of manufacturing and operating nano-scale energy converters and electric power generators. The nano-scale energy converters include two electrodes separated a predetermined distance. The first electrode is manufactured to have a first work function value. The second electrode is manufactured to have a second work function value different from the first work function value. A cavity is formed between the first and second electrodes, and a nanofluid is disposed in the cavity. The nanofluid includes a plurality of nanoparticles.

A method may be provided of manufacturing a thermoelectric leg. The method may include preparing a first metal substrate including a first metal, and forming a first plated layer including a second metal on the first metal substrate. The method may also include disposing a layer including tellurium (Te) on the first plated layer, and forming a portion of the first plated layer as a first bonding layer by reacting the second metal and the Te. The method also includes disposing a thermoelectric material layer including bismuth (Bi) and Te on an upper surface of the first bonding layer, and disposing a second metal substrate, on which a second bonding layer and a second plated layer are formed, on the thermoelectric material layer, and sintering.