High-compacted-density positive electrode material and electrochemical energy storage apparatus
摘要
說明書
In the positive electrode material provided in this application, 0.7≤b1≤0.75, 0.75≤b1≤0.8, 0.8≤b1≤0.85, 0.85≤b1≤0.9, or 0.9≤b1≤0.98 in Formula I of the chemical formula of the lithium-nickel transition metal oxide A. The lithium-nickel transition metal oxide A in this application uses a laminar lithium transition metal oxide with a relatively high nickel content to improve the energy density of the battery. However, if b1>0.98, lithium-nickel disordering is severe, resulting in production of excessive gas. Specifically, the lithium-nickel transition metal oxide A may be LiNi0.7Co0.1Mn0.2O2, LiNi0.75Co0.1Mn0.15O2, LiNi0.8Co0.1Mn0.1O2, LiNi0.85Co0.05Mn0.1O2, LiNi0.88Co0.05Mn0.07O2, or LiNi0.9Co0.05Mn0.05O2, or may be a material obtained through modification and substitution of M and/or X based on the foregoing substances, where M is selected from any one or a combination of Al, Ti, Zr, Nb, Sr, Sc, Sb, Y, Ba, B, C, Co, and Mn, and X is selected from F and/or Cl.
