Layered-oxide positive electrode active material and positive electrode plate, sodium-ion battery, and electric apparatus containing same
AssigneeContemporary Amperex Technology (Hong Kong) Limited
InventorsZibin Liang, Qiang Li, Yuhao Wang, Xinxin Zhang, Jinhua He
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Abstract
A layered-oxide positive electrode active material may have a molecular formula of NaxMnaFebNicMdNeO2-δQf, where a doping element M is selected from at least one of Cu, Li, Ti, Zr, K, Sb, Nb, Mg, Ca, Mo, Zn, Cr, W, Bi, Sn, Ge, or Al, a doping element N is selected from at least one of Si, P, B, S, or Se, a doping element Q is selected from at least one of F, Cl, or N, 0.66≤x≤1, 0<a≤0.70, 0<b≤0.70, 0<c≤0.23, 0≤d<0.30, 0≤e≤0.30, 0≤f≤0.30, 0≤δ≤0.30, a+b+c+d+e=1, 0<e+f≤0.30, 0<(e+f)/a≤0.30, 0.20≤d+e+f≤0.30, and (b+c)/a≤1.5.
Claims12
A layered-oxide positive electrode active material, having a molecular formula of NaxMnaFebNicMdNeO2-δQf,
- wherein
- a doping element M is selected from at least one of Cu, Li, Ti, Sb, or Mg;
- a doping element N is selected from at least one of Si, P, B or Se;
- a doping element Q is F, 0.66≤x≤1, 0<a≤0.70, 0<b≤0.70, 0<c≤0.23, 0≤d<0.30, 0<e≤0.30, 0<δ≤0.30, δ=f, a+b+c+d+e=1, 0<e+f≤0.30, 0<(e+f)/a≤0.30, 0.20≤d+e+f≤0.30 and 0<(b+c)/a≤1.5, and
- a characteristic peak intensity I1 in an X-ray diffraction pattern (003) of the layered-oxide positive electrode active material that has been soaked in water for 24 h and a characteristic peak intensity I0 in an X-ray diffraction pattern (003) of the layered-oxide positive electrode active material without soaking satisfy I1/I0≥0.2.
Dependencies are inferred from the claim text.