An active material for positive electrode for a non-aqueous electrolyte secondary battery comprises a lithium-metal composite oxide that is expressed by the general formula of Li.sub.x(Ni.sub.1-yCo.sub.y).sub.1-zM.sub.zO.sub.2 (where 0.98.ltoreq.x.ltoreq.1.10, 0.05.ltoreq.y.ltoreq.0.4, 0.01.ltoreq.z.ltoreq.0.2, and where M is at least one metal element selected from the group of Al, Mg, Mn, Ti, Fe, Cu, Zn and Ga), and where the SO.sub.4 ion content is in the range from 0.4 weight % to 2.5 weight %, and the occupancy rate of lithium found from the X-ray diffraction chart and using Rietveld analysis is 98% or greater, and the carbon amount measured by way of the high frequency heating-infrared adsorption method is 0.12 weight % or less, and that the Karl Fischer water content due to heating at 180.degree. C. be 0.2 weight % or less.

 
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> Microporous crystalline material comprising a molecular sieve or zeolite having an 8-ring pore opening structure and methods of making and using same

> Polymer with dispersed fine metal particles, process for producing same, metal ion-containing polymer for use in the production, and process for producing same

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