Abstract: A process for preparing an alkali metal oxyanion electrode material having a carbon coating deposited by a thermal treatment, said process comprising a thermal step under a humidified atmosphere of: (i) said alkali metal oxyanion electrode material having a carbon coating deposited by a thermal treatment; (ii) precursors of said alkali metal oxyanion electrode material and an organic precursor of carbon; or (iii) said alkali metal oxyanion electrode material and an organic precursor of carbon, wherein said thermal step is performed at a temperature in the range of about 300° C. to about 950° C.

Abstract: A nanocrystal described herein comprises a semiconductor material MX, wherein M is a group II or a group III element and X is a group V or a group VI element to provide a II/VI compound or a III/V compound, the nanocrystal having lateral dimensions and a vertical dimension having the shortest axis, wherein surfaces of the nanocrystal normal or substantially normal to the axis of the vertical dimension comprise a layer of M ions passivated by a counter ion chemical species.

Abstract: A polymer of Formula (I) wherein Ar, Y, Z, R3, R4, k, m, x, and n are as described herein. The isothioindigo-based polymer may be used in a semiconducting layer of an electronic device.

Abstract: A process for preparing transition metal particles with a gradient in composition from the core of the particle to the outer layers. In particular, the process involves contacting a first transition metal solution with a second transition metal solution to form a transition metal source solution under specific process conditions. The transition metal particles with desired composition gradients are precipitated from the transition metal source solution. The transition metal particles may be combined with metals such as lithium to form cathode active metal oxides.

Abstract: A compound represented by Formula 1 Het1-Bpy-Het2 is disclosed, wherein Bpy is optionally substituted 2,2?-bipyridinyl or optionally substituted 3,3?-bipyridinyl; and Het1 and Het2 are independently optionally substituted benzimidazol-2-yl or optionally substituted benzoxazol-2-yl. An organic light-emitting diode device comprising an organic component comprising a light-emitting component and a compound represented by Formula 1 is also disclosed.

Abstract: Perovskite semiconductor thin films and the method of making Perovskite semiconductor thin films are disclosed. Perovskite semiconductor thin films were deposited on inexpensive substrates such as glass and ceramics. CsSnI3 films contained polycrystalline domains with typical size of 300 nm and larger. It is confirmed experimentally that CsSnI3 compound in its black phase is a direct band-gap semiconductor, consistent with the calculated band structure from the first principles.

Abstract: A polymer of Formula (I) wherein Ar, R1, R2, R3, R4, Y, x, k, m, and n are as described herein. The polymer may be used in a semiconducting layer of an electronic device.

Abstract: A cathode active material including a spinel lithium manganese composite oxide represented by Formula 1 below, a cathode including the cathode active material, and a lithium battery including the cathode: LixMn2-y-zNiyMzO4-nXn??<Formula 1> where 0.025?x?1.1, 0.3?y<0.5, 0<z?0.15, and, 0<n?1; M is a transition metal; and X is a halogen element.

Abstract: An active material for a lithium battery electrode comprises a phase having the formula Li2+v?4cCcTi3?wFexMyM?zO7??, in which M and M? are metal ions of groups of 2 to 15 having an ionic radius between 0.5 and 0.8 ? in an octahedral environment, v, w, x, y, z and ? being associated by the relationships: 2?=?v+4w?3x?ny?n?z, with n and n? being the respective formal degrees of oxidation of M and M?; ?0.5?v?0.5; y+z>0; x+y+z=w; and 0<w?0.3; and wherein at least part of the lithium is substituted by carbon according to the relationship 0<c(2+v)/4. The invention also includes a method for synthesizing the active material which comprises mixing and grinding the precursor compounds containing the metal components, carbon and oxygen; heating the mixture in an inert atmosphere at a temperature of 950 to 1050° C. in order to make a ceramic phase; and rapidly cooling the ceramic phase to produce the active material.

Abstract: The present invention provides a process for producing a composite of metal sulfide and metal oxide obtained by dispersing a metal sulfide, which is nickel sulfide, copper sulfide, iron sulfide or a mixture thereof, in a metal salt-containing aqueous solution, and depositing metal salt on the metal sulfide by drying the aqueous solution; and heat-treating the metal sulfide comprising a metal salt deposited thereon at 400 to 900° C. in a sulfur-containing atmosphere. Also disclosed is a composite obtained by the aforementioned process, comprising a metal sulfide having a surface partially covered with a metal oxide. The composite of the present invention has improved cycle characteristics while maintaining a high charge/discharge capacity and excellent electrical conductivity inherently possessed by metal sulfide, which is usable as a material having a high theoretical capacity and excellent electrical conductivity when used as a positive-electrode material for a lithium secondary battery.

Abstract: An exemplary printable composition comprises a liquid or gel suspension of a plurality of metallic nanofibers or nanowires; a first solvent; and a viscosity modifier, resin, or binder. In various embodiments, the metallic nanofibers are between about 10 microns to about 100 microns in length, are between about 10 nm to about 120 nm in diameter, and are typically functionalized with a coating or partial coating of polyvinyl pyrrolidone or a similar compound. An exemplary metallic nanofiber ink which can be printed to produce a substantially transparent conductor comprises a plurality of metallic nanofibers; one or more solvents such as 1-butanol, ethanol, 1-pentanol, n-methylpyrrolidone, cyclohexanone, cyclopentanone, 1-hexanol, acetic acid, cyclohexanol, or mixtures thereof; and a viscosity modifier, resin, or binder such as polyvinyl pyrrolidone or a polyimide, for example.

Abstract: A method for preparing a cathode active material for a lithium secondary battery is provided. The preparing method includes: adding a phosphorus compound to a transition metal oxide dispersion liquid to prepare a coating liquid; drying the coating liquid to prepare a powder including phosphorus oxide coated on the surface of the transition metal oxide; and dry-mixing the powder coated with the phosphorus oxide with a lithium intercalation compound, and then firing the mixture to form a solid solution compound of L1-M1-M2-P—O (where M1 is a transition metal derived from transition metal oxide, and M2 is a metal derived from lithium intercalation compound) on the surface of the lithium intercalation compound. The method for preparing a cathode active material for a lithium secondary battery simplifies the conventional preparing process to save process cost, and it provides comparable electrochemical characteristics to a cathode active material obtained from a wet process.