A class of compositions that are inclusive of a lithium metal oxide or oxyfluoride compound having a general formula: LiTM[n]OF where TM[n] represents a number of transition metal species inclusive of transitional metal species differentiated by charge or d.sup.0 electron shell conformation, with [n] being at least 4 of said transitional metal species, and wherein said lithium metal oxide or oxyfluoride has a cation-disordered rocksalt (DRX) structure and a mitigated SRO via a high entropy DRX design strategy. Also featured is a method of synthesizing the high entropy DRX lithium metal oxide or oxyfluoride compounds, as well as usage of the same in Li-ion batteries, with particular utility in cathodes of such Li-ion batteries.

The invention relates to Chevrel-phase materials and methods of preparing these materials utilizing a precursor approach. The Chevrel-phase materials are useful in assembling electrodes, e.g., cathodes, for use in electrochemical cells, such as rechargeable batteries. The Chevrel-phase materials have a general formula of Mo.sub.6Z.sub.8 (Z=sulfur) or Mo.sub.6Z.sup.1.sub.8-yZ.sup.2.sub.y (Z.sup.1=sulfur; Z.sup.2=selenium), and partially cuprated Cu.sub.1Mo.sub.6S.sub.8 as well as partially de-cuprated Cu.sub.1-xMg.sub.xMo.sub.6S.sub.8 and the precursors have a general formula of M.sub.xMo.sub.6Z.sub.8 or M.sub.xMo.sub.6Z.sup.1.sub.8-yZ.sup.2.sub.y, M=Cu. The cathode containing the Chevrel-phase material in accordance with the invention can be combined with a magnesium-containing anode and an electrolyte.

Provided is a molybdenum oxychloride characterized in having a purity of 99.9995 wt % or higher. Additionally provided is a manufacturing method of a molybdenum oxychloride including the steps of reacting MoO.sub.3 and Cl.sub.2 and synthesizing the molybdenum oxychloride in a reaction chamber, and cooling the synthesized molybdenum oxychloride gas and precipitating the molybdenum oxychloride in a recovery chamber, wherein an impurity trap is provided between the reaction chamber and the recovery chamber, and impurities are removed with the impurity trap. An object of the present invention is to provide a high-purity molybdenum oxychloride and a manufacturing method therefor.

A method for crystallization of β-ammonium tetramolybdate includes: performing a stepwise pH-adjusting treatment of an ammonium molybdate solution via zoning to obtain the β-ammonium tetramolybdate. When feeding the ammonium molybdate solution into a reaction system from a first zone and then into second to sixth zones successively, pH.sup.1 of a resultant solution in the first zone is 7.0-6.0; pH.sup.2 of a resultant solution in the second zone is less than 6 and greater than or equal to 4; pH.sup.3 of a resultant solution in the third zone is less than 4 and greater than or equal to 2.5; pH.sup.4 of a crystallized slurry in the fourth zone is less than 2.5 and greater than or equal to 1; pH.sup.5 of a crystallized slurry in the fifth zone is 2.5-4.0; and pH.sup.6 of a crystallized slurry in the sixth zone is less than 2.5 and greater than or equal to 2.0.

The invention relates to active electrode materials and to methods for the manufacture of active electrode materials. Such materials are of interest as active electrode materials in lithium-ion or sodium-ion batteries. The invention provides an active electrode material expressed by the general formula [M1].sub.x[M2].sub.(1−x)[Nb]y[O].sub.z, wherein: M1 and M2 are different; M1 represents one or more of Ti, Mg, V, Cr, W, Zr, Mo, Cu, Fe, Ga, Ge, Ca, K, Ni, Co, Al, Sn, Mn, Ce, Te, Se, Si, Sb, Y, La, Hf, Ta, Re, Zn, In, or Cd; M2 represents one or more of Mg, V, Cr, W, Zr, Mo, Cu, Ga, Ge, Ca, K, Ni, Co, Al, Sn, Mn, Ce, Sb, Y, La, Hf, Ta, Zn, In, or Cd; and wherein x satisfies 0<x<0.5; y satisfies 0.5≤y≤49 z satisfies 4≤z≤124.

An iron-containing Chevrel phase material, contains iron and Mo.sub.6S.sub.8 clusters, in particular an iron-containing Chevrel phase material having a formula Fe.sub.xMo.sub.6S.sub.8, wherein 2≤x≤4. The iron-containing Chevrel phase provides an efficient catalyst for the electrochemical production of ammonia from water and nitrogen gas.

A hydrogenation catalyst contains a hydrogenation catalyst carrier and an active hydrogenation component. The active hydrogenation component includescompriscs a Group VIB metal sulfide and a Group VIII metal compound, and the molar proportion of a substance of the Group VIII metal compound that interacts with the Group VIB metal sulfide to the total amount of the Group VIII metal compound is 60-100%. The hydrogenation catalyst has a higher active metal sulfurizing degree and a higher number of type II active centers, and can be applied to the hydrogenation treatment process of oil products such as distillate oils and residual oils

The process of reacting nanoscale ce-MoS.sub.2 nanosheets anchored on oxide support with lead in solution at room temperature whereby the reaction is rapid and spontaneous resulting in the formation of PbMoO.sub.4-xS.sub.x in the process of scavenging Pb.sup.2+ and Pb.sup.4+ present in the solution.

The invention relates to Chevrel-phase materials and methods of preparing these materials utilizing a precursor approach. The Chevrel-phase materials are useful in assembling electrodes, e.g., cathodes, for use in electrochemical cells, such as rechargeable batteries. The Chevrel-phase materials have a general formula of Mo.sub.6Z.sub.8 (Z=sulfur) or Mo.sub.6Z.sup.1.sub.8-yZ.sup.2.sub.y (Z.sup.1=sulfur; Z.sup.2=selenium), and partially cuprated Cu.sub.1Mo.sub.6S.sub.8 as well as partially de-cuprated Cu.sub.1-xMg.sub.xMo.sub.6S.sub.8 and the precursors have a general formula of M.sub.xMo.sub.6Z.sub.8 or M.sub.xMo.sub.6Z.sup.1.sub.8-yZ.sup.2.sub.y, M=Cu. The cathode containing the Chevrel-phase material in accordance with the invention can be combined with a magnesium-containing anode and an electrolyte.

A method for crystallization of β-ammonium tetramolybdate includes: performing a stepwise pH-adjusting treatment of an ammonium molybdate solution via zoning to obtain the β-ammonium tetramolybdate. When feeding the ammonium molybdate solution into a reaction system from a first zone and then into second to sixth zones successively, pH.sup.1 of a resultant solution in the first zone is 7.0-6.0; pH.sup.2 of a resultant solution in the second zone is less than 6 and greater than or equal to 4; pH.sup.3 of a resultant solution in the third zone is less than 4 and greater than or equal to 2.5; pH.sup.4 of a crystallized slurry in the fourth zone is less than 2.5 and greater than or equal to 1; pH.sup.5 of a crystallized slurry in the fifth zone is 2.5-4.0; and pH.sup.6 of a crystallized slurry in the sixth zone is less than 2.5 and greater than or equal to 2.0.