A negative electrode active material for a secondary battery, including lithium titanium-based composite particles comprising: a lithium titanium oxide represented by Li.sub.xTi.sub.yO.sub.z, wherein x, y and z satisfy 0.1≤x≤4, 1≤y≤5 and 2≤z≤12; Zr doped into the lithium titanium oxide; and an aluminum and sulfur containing compound coated on a surface of the lithium titanium oxide. The lithium titanium-based composite particles include at least one of primary particles or secondary particles formed by agglomeration of the primary particles, and an average particle size of the primary particles of the lithium titanium-based composite particles is in a range of 550 nm to 1.1 μm.

This application describes electrode materials and methods of producing them, the materials containing particles having a core-shell structure, wherein the shell of the core-shell particles comprises a polymer, the polymer being grafted on the surface of the core particle by covalent bonds. Electrodes and electrochemical cells containing these electrode materials are also contemplated, as well as their use.

Provided is a potassium titanate powder that can avoid safety and health concerns and concurrently, during use in a friction material, can give excellent frictional properties. A potassium titanate powder is a powder formed of bar-like potassium titanate particles having an average length of 30 μm or more, an average breadth of 10 μm or more, and an average aspect ratio of 1.5 or more, wherein the bar-like potassium titanate particles are represented by a composition formula K.sub.2Ti.sub.nO.sub.2n+1 (where n=5.5 to 6.5).

The present invention provides a particulate cobalt ion adsorbent which has a high adsorption capacity. A particulate cobalt ion adsorbent which contains potassium hydrogen dititanate hydrate represented by chemical formula K.sub.2-XH.sub.xO.2TiO.sub.2.nH.sub.2O (wherein x is 0.5 or more and 1.3 or less, and n is greater than 0), and no binder, wherein the particulate cobalt ion adsorbent has a particle size range of 150 μm or more and 1000 μm or less.

According to one embodiment, an active material includes a lithium-titanium composite oxide. The lithium-titanium composite oxide includes a lithium compound including at least one of lithium carbonate and lithium hydroxide. A lithium amount of the lithium compound is within a range of 0.017 to 0.073 mass %.

The present development is a process for the preparation of nanowire synthesis, coatings and uses thereof. Lithium titanate (LTO) nanowires are synthesized using a continuous hydrocarbon/plasma flame process technology combined with the dry impregnation method. The resulting LTO nanowires can be used as electro active anode materials for lithium ion batteries. The coating parameters, such as thickness, porosity of the film, packing density, and viscosity are controlled using the length of the nanowires, calendaring pressure, and slurry composition.

The present invention relates to a lithium-titanium complex oxide, a preparation method thereof, and a lithium secondary battery comprising the same and, more specifically, to a lithium-titanium complex oxide which maintains appropriate pores within particles, and which is prepared by adding a pore inducing material in the wet-milling step to adjust sizes of primary particles of the lithium-titanium complex oxide, a preparation method thereof, and a lithium secondary battery comprising the same.

The present invention relates to a positive electrode active material and a lithium secondary battery comprising the same.

A cathode configured to use oxygen as a cathode active material includes: a porous film including a metal oxide, where a porosity of the porous film is about 50 volume percent to about 95 volume percent, based on a total volume of the porous film, and an amount of an organic component in the porous film is 0 to about 2 weight percent, based on a total weight of the porous film.

A composite solid state electrolyte comprises a polymer electrolyte material, a ceramic ion conductor, and a functionalized coupling agent selected to be compatible with the ceramic ion conductor and the bulk polymer compound. The polymer electrolyte material comprises a bulk polymer compound and a lithium salt. The functionalized coupling agent has a backbone that is structurally similar to the bulk polymer compound.