There is provided a positive electrode active material containing a large number of crystal grains which contain, by 70 areal % or more, primary particles of non-octahedral shape , having particle diameters of 5 to 20 µm, and composed of lithium manganate...

There is provided a positive electrode active material having a specific surface area of 0.1 to 0.5 m 2 /g, which contains a large number of crystal grains containing primary particles of 5 to 20 µm in particle diameter, composed of lithium manganate of s...

There is provided a positive electrode active material comprising a large number of crystal grains composed of lithium manganate of spinel structure, wherein the large number of crystal grains contain primary particles of 3 to 20 µm in particle diameter b...

A positive active material for a rechargeable lithium battery includes pores having an average diameter of about 10 nm to about 60 nm and a porosity of about 0.5 % to about 20 %. Also disclosed is a method of preparing the positive active material, a recha...

A positive electrode active material is a layered lithium manganese compound represented by a general formula Li1-xMO2, where x is a lithium-deficient quantity and larger than 1/5, and M is manganese or metals of two or more kinds containing manganese as a...