6 results about "Antimony telluride" patented technology

The application discloses a bismuth telluride / antimony telluride heterojunction anode catalyst for a lithium air battery and a preparation method thereof, and belongs to the technical field of lithium air batteries. The bismuth telluride / antimony telluride heterojunction anode catalyst for the lithium air battery comprises bismuth telluride / antimony telluride nanosheets, the bismuth telluride / antimony telluride nanosheets are formed by epitaxial growth of antimony telluride on the surface of bismuth telluride to form a lateral heterojunction, and when the bismuth telluride / antimony telluride nanosheets are used as an anode catalyst of a lithium air battery, the specific capacity of the battery can be improved, the overpotential can be reduced, and the cycle stability can be improved; even in an air environment, the first discharge capacity of the lithium air battery can reach more than 8000 mAh / g at 500 mA / g, and the lithium air battery can be cycled more than 350 times at a high current density of 1000 mA / g and a cut-off capacity of 500 mAh / g, and excellent cycle performance is maintained.

The invention discloses a bismuth telluride / antimony telluride heterojunction positive electrode catalyst for a lithium air battery, a preparation method of the bismuth telluride / antimony telluride heterojunction positive electrode catalyst and the lithium air battery, and belongs to the technical field of lithium air batteries. The bismuth telluride / antimony telluride heterojunction positive electrode catalyst for the lithium air battery comprises a bismuth telluride / antimony telluride nanosheet, the bismuth telluride / antimony telluride nanosheet is obtained by forming a transverse heterojunction through epitaxial growth of antimony telluride on the surface of bismuth telluride, and when the bismuth telluride / antimony telluride heterojunction positive electrode catalyst serves as the positive electrode catalyst of the lithium air battery, the specific capacity of the battery can be improved; compared with the prior art, the lithium-air battery prepared by the preparation method has the advantages that the lithium-air battery prepared by the preparation method disclosed by the invention has the advantages that the overpotential is reduced, the cycling stability is improved, the first discharge capacity of the lithium-air battery at 500mA / g can still reach 8000mAh / g or above even in an air environment, meanwhile, the lithium-air battery can be circulated for 350 circles or above under the high current density of 1000mA / g and the cut-off capacity of 500mAh / g, and the excellent cycling performance is kept.

The present disclosure provides a composition comprising a sodium matrix and antimony telluride particles distributed throughout, configured to facilitate sodium stripping from a bulk portion during electrochemical cycling. The antimony telluride particles may comprise Sb2Te3 and have an average particle size of less than 10 pm. The composition facilitates sodium replating into areas where pores have formed during stripping and enhances interfacial stability with a NASICON solid electrolyte. Also provided is a solid-state battery comprising a solid electrolyte and an electrode comprising the sodium matrix and antimony telluride particles, wherein the electrode maintains interfacial stability with the solid electrolyte during electrochemical cycling by facilitating sodium stripping from a bulk portion.

The application provides a preparation method of a phase change storage material titanium-antimony-tellurium target material, and belongs to the field of microelectronic technology. The application adopts a segmented heat treatment process of high first and low later, ensures that titanium and antimony and titanium and tellurium are synthesized into titanium antimonide and titanium telluride respectively, and titanium antimonide and titanium telluride have better compatibility compared with metal titanium and antimony telluride, long time insulation during synthesis ensures complete reaction, titanium can be uniformly distributed in the grain boundary of antimony telluride after the target material is prepared, and then low-temperature vacuum hot-pressing sintering is adopted to prevent target material grain growth caused by high temperature, and long time pressure keeping is adopted to ensure that the phase is more uniform, the phase change storage material titanium-antimony-tellurium target material with high purity, low oxygen content and relative density greater than or equal to 95% is obtained, the quality index is better, and therefore the thin film deposition efficiency and performance can be improved.

The invention discloses an iron-based superconducting heterojunction and a preparation method thereof, and belongs to the field of topological superconducting heterojunctions. The iron-based superconducting heterojunction is of a layered structure and comprises a titanium dioxide buffer layer, an iron-selenium-tellurium superconducting layer and an antimony telluride topological insulating layer which are sequentially grown on the surface of a strontium titanate substrate. The preparation method of the iron-based superconducting heterojunction comprises the following steps: (1) preparing a Sb2Te3 bulk material; (2) preprocessing and loading an STO substrate; (3) enabling the TiO2 buffer layer to grow on the surface of the STO substrate by using a PLD (Pulsed Laser Deposition) process; (4) growing an FST superconducting layer on the surface of the TiO2 buffer layer by using a PLD process; (5) enabling the Sb2Te3 topological insulating layer to grow on the surface of the TiO2 buffer layer by using a PLD (Pulsed Laser Deposition) process; and (6) post-annealing: carrying out post-annealing on the Sb2Te3 bulk material obtained in the step (1) and the precursor obtained in the step (5) to obtain the iron-based superconducting heterojunction. The iron-based superconducting heterojunction provided by the invention can achieve the effects of zero resistance and relatively high temperature.

The invention relates to the technical field of thermoelectric materials, and discloses a graphdiyne-doped BiSbTe-based thermoelectric material and a preparation method and application thereof.The preparation method comprises the steps that (Bi, Sb) 2Te3 powder and graphdiyne powder are mixed and sintered, and the graphdiyne-doped BiSbTe-based thermoelectric material is obtained. Benefited from collaborative optimization of electroacoustic transport, the graphdiyne-doped BiSbTe-based thermoelectric material provided by the invention shows thermoelectric performance far superior to that of a contrast sample (an undoped material) in a wide temperature range of 300K to 500K. The thermoelectric figure of merit (ZT value) is obviously improved, the highest ZT value can reach 1.1 or above, and the excellent room-temperature and near-room-temperature thermoelectric conversion efficiency is shown.