POSITIVE ELECTRODE PLATE FOR LITHIUM-ION RECHARGEABLE BATTERY, AND LITHIUM-ION RECHARGEABLE BATTERY
A positive electrode plate for a lithium-ion rechargeable battery includes a positive electrode mixture layer. In the positive electrode mixture layer, a fibrous conductor is combined with a positive electrode active material in which an amount of lithium carbonate with respect to the positive electrode active material is between 0.31 wt % and 1.29 wt %, inclusive. A composition ratio of the fibrous conductor to the positive electrode active material is between 0.5 wt % and 2.0 wt %, inclusive. A coverage of the fibrous conductor to the positive electrode active material is 11.0% or less.
1 . A positive electrode plate for a lithium-ion rechargeable battery, the positive electrode comprising:
a positive electrode mixture layer, wherein:
in the positive electrode mixture layer, a fibrous conductor is combined with a positive electrode active material in which an amount of lithium carbonate with respect to the positive electrode active material is between 0.31 wt % and 1.29 wt %, inclusive;
a composition ratio of the fibrous conductor to the positive electrode active material is between 0.5 wt % and 2.0 wt %, inclusive; and
a coverage of the fibrous conductor to the positive electrode active material is 11.0% or less.
2 . The positive electrode plate according to claim 1 , wherein:
the positive electrode active material is represented by a chemical formula of LiNi x Co y M z O 2 ; and
when “M” represents one or more types of metals selected from a group consisting of Fe, Cu, Ti, Mg, Al, W, B, Mo, Nb, Zn, Sn, Zr, Ga, and V, a composition ratio of Li/M is between 1.15 and 1.21, inclusive.
3 . The positive electrode plate according to claim 1 , wherein:
when “M” represents one or more types of metals selected from a group consisting of Fe, Cu, Ti, Mg, Al, W, B, Mo, Nb, Zn, Sn, Zr, Ga, and V,
the positive electrode active material is represented by a chemical formula of LiNi x Co y M z O 2 ;
x=1-y-z is satisfied;
0<x≤0.5 is satisfied;
0.2≤y≤0.5 is satisfied;
y+z≥0.5 is satisfied; and
y/x≥0.98 is satisfied.
4 . The positive electrode plate according to claim 3 , wherein the “x” satisfies x≤0.37.
5 . The positive electrode plate according to claim 1 , wherein the fibrous conductor is formed by carbon nanotubes or carbon nanofibers.
6 . The positive electrode plate according to claim 5 , wherein the fibrous conductor has a length of 100 nm to 1000 nm.
7 . A lithium-ion rechargeable battery, comprising:
the positive electrode plate for a lithium-ion rechargeable battery according to claim 1 .