Studies on Synthesis and Electrochemical Performance of Li_(1+δ) Ni_(1-x)Co_xO_(2-y)F_y Cathode Materials for Lithium-ion Batteries?

It is a technological problem of LiNiO2 cathode material for lithium-ion secondary batteries because of the difficult preparation and hard purification, instable performance, remarkable capacity fading at initial discharge, worse thermal stability and safety of Ni-series cathode materials, and it is also the key factor of hindering LiNiO2 cathode material from practical applications. Recently, by doping some metal cations such as Co, Mn, Mg, Al, Cr and so on1-5] into LiNiO2, the preparat…