Positive active material for lithium battery, lithium battery having the same and method for producing the same
AssigneeJapan Storage Battery Co., Ltd.
InventorHideo Yasuda
Life of this patent
Estimating the term…
Abstract
A positive active material for lithium battery, includes a lithium-containing amorphous nickel oxide represented by a chemical composition formula of Li.sub.x NiO.sub.2 ; wherein x is from greater than 0.25 to 2. Preferably, x is from greater than 1 to 2. More preferably, x is from greater than 1.4 to 2. The positive active material may contains cobalt from 2 to 60 mol % {(Co/(Ni+Co)}.
Claims20
A positive active material for lithium battery, comprising a lithium-containing amorphous nickel oxide represented by a chemical composition formula of Li.sub.x Ni.sub.1-y M.sub.y O.sub.2 ;
- wherein x is from greater than 0.25 to 2, y is from 0 to less than 1, and M is at least one selected from the group consisting of Co, Mn, Al, P, B and Si.
A positive active material for lithium battery, comprising a lithium-containing amorphous nickel oxide synthesized to have a chemical composition formula of Li.sub.x Ni.sub.1-y M.sub.y O.sub.2 ;
- wherein x is from greater than 1.4 to 2, y is from 0 to less than 1, and M is at least one selected from the group consisting of Co, Mn, Al, P, B and Si.
A positive active material for lithium battery, comprising a lithium-containing amorphous nickel oxide represented by a chemical composition formula of Li.sub.x Ni.sub.1-y-z Co.sub.y M.sub.z O.sub.2 ;
- wherein x is from greater than 0.25 to 2, y is from 0.02 to 0.6, z is from 0 to less than 1, y+z is less than 1 and M is at least one selected from the group consisting of Co, Mn, Al, P, B and Si.
A positive active material for lithium battery, comprising a lithium-containing amorphous nickel oxide synthesized to have a chemical composition formula of Li.sub.x Ni.sub.1-y-z Co.sub.y M.sub.z O.sub.2 ;
- wherein x is from greater than 1.4 to 2, y is from 0.02 to 0.6, z is from 0 to less than 1, y+z is less than 1 and M is at least one selected from the group consisting of Co, Mn, Al, P, B and Si.
A lithium battery comprising a positive active material comprising a lithium-containing amorphous nickel oxide represented by a chemical composition formula of Li.sub.x Ni.sub.1-y M.sub.y O.sub.2 ;
- wherein x is from greater than 0.25 to 2, y is from 0 to less than 1, and M is at least one selected from the group consisting of Co, Mn, Al, P, B and Si.
A lithium battery comprising a positive active material comprising a lithium-containing amorphous nickel oxide synthesized to have a chemical composition formula of Li.sub.x Ni.sub.1-y M.sub.y O.sub.2 ;
- wherein x is from greater than 1.4 to 2, y is from 0 to less than 1, and M is at least one selected from the group consisting of Co, Mn, Al, P, B and Si.
A lithium battery comprising a positive active material, comprising a lithium-containing amorphous nickel oxide represented by a chemical composition formula of Li.sub.x Ni.sub.1-y-z Co.sub.y M.sub.z O.sub.2 ;
- wherein x is from greater than 0.25 to 2, y is from 0.02 to 0.6, z is from 0 to less than 1, y+z is less than 1 and M is at least one selected from the group consisting of Co, Mn, Al, P, B and Si.
A lithium battery comprising a positive active material comprising a lithium-containing amorphous nickel oxide synthesized to have a chemical composition formula of Li.sub.x Ni.sub.1-y-z Co.sub.y M.sub.z O.sub.2 ;
- wherein x is from greater than 1.4 to 2, y is from 0.02 to 0.6, z is from 0 to less than 1, y+z is less than 1 and M is at least one selected from the group consisting of Co, Mn, Al, P, B and Si.
A method for producing a positive active material for lithium battery comprising the steps of:
- mixing at least one salt selected from the group consisting of phosphate, borate and silicate, a lithium salt and at least one nickel compound selected from the group consisting of nickel hydroxide and nickel oxyhydroxide;
- and
- subjecting the mixture to heat treatment to produce a positive active material comprising a lithium-containing amorphous nickel oxide represented by a chemical composition formula of Li.sub.x Ni.sub.1-y M.sub.y O.sub.2 containing at least one of phosphorous, boron and silicon;
- wherein x is from greater than 0.25 to 2, y is from 0 to less than 1, and M is at least one selected from the group consisting of Co, Mn, Al, P, B and Si.
A method for producing a positive active material for lithium battery comprising the steps of:
- mixing at least one salt selected from the group consisting of phosphate, borate and silicate, a lithium salt and at least one nickel compound selected from the group consisting of nickel hydroxide and nickel oxyhydroxide;
- and
- subjecting the mixture to heat treatment to produce a positive active material comprising a lithium-containing amorphous nickel oxide synthesized to have a chemical composition formula of Li.sub.x Ni.sub.1-y M.sub.y O.sub.2 containing at least one of phosphorous, boron and silicon;
- wherein x is from greater than 1.4 to 2, y is from 0 to less than 1, and M is at least one selected from the group consisting of Co, Mn, Al, P, B and Si.
A method for producing a positive active material for lithium battery comprising the steps of:
- mixing at least one salt selected from the group consisting of phosphate, borate and silicate, a lithium salt and at least one nickel compound selected from the group consisting of nickel hydroxide and nickel oxyhydroxide;
- and
- subjecting the mixture to heat treatment to produce a positive active material comprising a lithium-containing amorphous nickel oxide represented by a chemical composition formula of Li.sub.x Ni.sub.1-y-z Co.sub.y M.sub.z O.sub.2 containing at least one of phosphorous, boron and silicon;
- wherein x is from greater than 0.25 to 2, y is from 0.02 to 0.6, z is from 0 to less than 1 y+z is less than 1 and M is at least one selected from the group consisting of Co, Mn, Al, P, B and Si.
A method for producing a positive active material for lithium battery comprising the steps of:
- mixing at least one salt selected from the group consisting of phosphate, borate and silicate, a lithium salt and at least one nickel compound selected from the group consisting of nickel hydroxide and nickel oxyhydroxide;
- and
- subjecting the mixture to heat treatment to produce a positive active material comprising a lithium-containing amorphous nickel oxide synthesized to have a chemical composition formula of Li.sub.x Ni.sub.1-y-z Co.sub.y M.sub.z O.sub.2 containing at least one of phosphorous, boron and silicon;
- wherein x is from greater than 1.4 to 2, y is from 0.02 to 0.6, z is from 0 to less than 1, y+z is less than 1 and M is at least one selected from the group consisting of Co, Mn, Al, P, B and Si.
Dependencies are inferred from the claim text.