The present invention relates to a positive electrode active material which is formed such that a lithium ion diffusion path in a lithium composite oxide constituting a positive electrode active material is directed to a specific crystal plane, and has imp...

A positive active material for a lithium secondary battery contains a lithium-transition metal composite oxide represented by a composition formula of Li 1+± Me 1-± O 2 (Me is a transition metal element including Co, Ni, and Mn; 1.2 < (1 + ±)/(1 - ±) <...

Described is an electrode active material for an electrochemical cell, said electrode active material being a borate (BO 3 ) compound of formula : A a M b O d (BO 3 ) c wherein: - "A" is at least one alkali metal selected from Li, Na, K ; and 0‰¤ a ‰...