The present invention provides the compound LiMn.sub.2--x-yNa.sub.xM.sub.yO.sub.4/Na.sub.1-zMnLi.sub.zM.sub.tO.sub.2/Na.sub.2CO.sub.3, to be used as a positive electrode for rechargeable lithium ion battery, where M is a metal or metalloid, 0.0x0.5; 0.0y0.5; 0.1z0.5; 0.0t0.3; as well as the method for producing it. The synthesis process includes disolving or mixing the precursor metals and then calcining them in air or controlled atmosphere in a temperature range between 250 C. and 1000 C., and for a time range of 0.5 h to 72 h to obtain the composite proposed with the interaction of its three present phases, presenting a high retention capacity during repeated loading/unloading cycles and excellent discharge capacity both at room temperature and up to 55 C.

An inorganic green pigment includes a material with spinel structure of the general formula selected from the following formulas a) (A.sub.1xB.sub.1+x)(C.sub.3xyD.sub.2xB.sub.1x2yNi.sub.3y)O.sub.8, wherein 0.05x0.9 and 0.05y0.5, and wherein x+2y1; b) (A.sub.1xB.sub.1+x)(C.sub.3xyD.sub.2xyB.sub.1xyNi.sub.2y)O.sub.8, wherein 0.05x0.5 and 0.05y0.5; c) (A.sub.1xB.sub.1+x)(C.sub.3x4yD.sub.2xB.sub.1x+yNb.sub.y)O.sub.8, wherein 0.05x0.5 and 0.05y0.2; d) (A.sub.1xB.sub.1+x)(C.sub.3xD.sub.2x2yB.sub.1x+yNb.sub.y)O.sub.8, wherein 0.05x0.9 and 0.05y0.2, and wherein xy; and e) (A.sub.1xB.sub.1+x)(C.sub.3x3yD.sub.2xB.sub.1xNb.sub.2yNi.sub.y)O.sub.8, wherein 0.05x0.9 and 0.05y0.2, wherein A is at least one element selected from Co, Zn, Ca, Mg and Cu, wherein B is at least one element selected from Li and Na, wherein C is at least one element selected from Ti, Mn, Sn and Ge, and wherein D is at least one element selected from Cr, B, Fe, Mn and Al.

Vessels such as crucibles, pans, open cups and saggars, containing a monolithic ceramic material, and a ceramic matrix composite, wherein the monolithic ceramic material is an inner part. A method for making oxide materials that can be utilized in the contact with corrosive materials and that allows for higher conversions in a given heating process.

The present invention relates to a method for obtaining calcium aluminates for metallurgical use from non-saline aluminum slags by means of reactive grinding and thermal treatment.

A sputtering target comprising a top coat including a composition of lithium cobalt oxide LiyCozOx. x is smaller than or equal to y+z, and the lithium cobalt oxide has an X-Ray diffraction pattern with a peak P2 at 440.2 2-theta. The X-Ray diffraction pattern is measured with an X-Ray diffractometer with CuK1 radiation.

Provided are electrochemically active secondary particles that provide excellent capacity and improved cycle life. The particles are characterized by selectively enriched grain boundaries where the grain boundaries are enriched with Al and Co. The enrichment with Al reduces impedance generation during cycling thereby improving capacity and cycle life. Also provided are methods of forming electrochemically active materials, as well as electrodes and electrochemical cells employing the secondary particles.

The present invention relates to the field of technologies for powering portable electronic parts, electrical tools, hybrid and electric vehicles and storage systems for renewable energy sources. Specifically, the invention relates to lithium ion batteries, more specifically to an active compound useful for manufacturing the cathodes in said lithium ion batteries. Even more specifically, the present invention relates to a manganese spinel doped with magnesium, a cathodic material comprising the same, the method for preparing thereof and lithium ion batteries comprising such spinel.

A powder for dust cores includes an aggregate of soft magnetic particles, each of which includes a soft magnetic metal particle, and a ferrite film that covers a surface of the soft magnetic metal particle and includes ferrite crystal grains having a spinel structure. A diffraction peak derived from the ferrite crystal grains exists in a powder X-ray diffraction pattern. By a method for producing a powder for dust cores, a raw material powder that includes an aggregate of soft magnetic metal particles is prepared. Furthermore, many ferrite fine particles are formed on a surface of each of the soft magnetic metal particles of the raw material powder. Additionally, the ferrite fine particles are coarsely crystallized through heat treatment to form a ferrite film, which includes ferrite crystal grains having a spinel structure, on the surface of the each of the soft magnetic metal particles.

A positive active material for a rechargeable lithium battery includes a first oxide particle having a layered structure and a second oxide layer located in a surface of the first oxide particle and including a second oxide represented by the following Chemical Formula 1: M.sub.aL.sub.bO.sub.c, wherein in Chemical Formula 1, 0<a3, 1b2, 3.8c4.2, M is at least one element selected from the group of Mg, Al, Ga, and combinations thereof, and L is at least one element selected from of group Ti, Zr, and combinations thereof.

A lithium secondary battery includes a positive electrode including a lithium manganese-based first positive electrode active material having a spinel structure doped and coated and a lithium nickel-manganese-cobalt-based second positive active material, a negative electrode including artificial graphite having a specific surface area (BET) of 0.1-1.2 m.sup.2/g and at least one selected from the group consisting of soft carbon and natural graphite which have a greater specific surface area than the artificial graphite, a separator interposed between the positive electrode and the negative electrode, and an electrolyte.