Processes for making dense, spherical active materials for lithium-ion cells
First Claim
1. A method comprising:
- precipitating spherical particles comprising one or more metal carbonates or one or more metal phosphates from a combined aqueous solution comprising a precipitating agent, wherein;
the precipitating agent is selected from ammonium hydrogen carbonate, sodium hydrogen carbonate, or a mixture comprising sodium hydrogen carbonate when the spherical particles are the one or more metal carbonates and the metal carbonates are selected from the group consisting of (Niα
Coβ
Mnγ
Me′
δ
)CO3, wherein Me′
is selected from the group consisting of Fe, Ag, Cu, Zn, or Mg;
0<
α
≦
1, 0<
β
≦
1, 0<
γ
≦
1, and 0≦
δ
≦
1; and
the sum of α
, β
, γ
, and δ
is 1;
orthe precipitating agent is ammonium hydrogen phosphate, ammonium dihydrogen phosphate, sodium phosphate, sodium hydrogen phosphate, sodium dihydrogen phosphate, or a mixture comprising any two or more thereof when the spherical particles are the one or more metal phosphates wherein the metal phosphates are selected from the group consisting of (Niα
′
Coβ
′
Mnγ
′
Feδ
)(PO4);
wherein 0≦
α
′
≦
1, 0≦
β
′
≦
1, 0≦
γ
′
≦
1, and 0≦
δ
≦
1; and
where the sum of α
′
, β
′
, γ
′
, and δ
is 1.
2 Assignments
0 Petitions
Accused Products
Abstract
Processes are provided for making dense, spherical mixed-metal carbonate or phosphate precursors that are particularly well suited for the production of active materials for electrochemical devices such as lithium ion secondary batteries. Exemplified methods include precipitating dense, spherical particles of metal carbonates or metal phosphates from a combined aqueous solution using a precipitating agent such as ammonium hydrogen carbonate, sodium hydrogen carbonate, or a mixture that includes sodium hydrogen carbonate. Other exemplified methods include precipitating dense, spherical particles of metal phosphates using a precipitating agent such as ammonium hydrogen phosphate, ammonium dihydrogen phosphate, sodium phosphate, sodium hydrogen phosphate, sodium dihydrogen phosphate, or a mixture of any two or more thereof. Further provided are compositions of and methods of making dense, spherical metal oxides and metal phosphates using the dense, spherical metal precursors. Still further provided are electrodes and batteries using the same.
-
Citations
22 Claims
-
1. A method comprising:
-
precipitating spherical particles comprising one or more metal carbonates or one or more metal phosphates from a combined aqueous solution comprising a precipitating agent, wherein; the precipitating agent is selected from ammonium hydrogen carbonate, sodium hydrogen carbonate, or a mixture comprising sodium hydrogen carbonate when the spherical particles are the one or more metal carbonates and the metal carbonates are selected from the group consisting of (Niα
Coβ
Mnγ
Me′
δ
)CO3, wherein Me′
is selected from the group consisting of Fe, Ag, Cu, Zn, or Mg;
0<
α
≦
1, 0<
β
≦
1, 0<
γ
≦
1, and 0≦
δ
≦
1; and
the sum of α
, β
, γ
, and δ
is 1;
orthe precipitating agent is ammonium hydrogen phosphate, ammonium dihydrogen phosphate, sodium phosphate, sodium hydrogen phosphate, sodium dihydrogen phosphate, or a mixture comprising any two or more thereof when the spherical particles are the one or more metal phosphates wherein the metal phosphates are selected from the group consisting of (Niα
′
Coβ
′
Mnγ
′
Feδ
)(PO4);
wherein 0≦
α
′
≦
1, 0≦
β
′
≦
1, 0≦
γ
′
≦
1, and 0≦
δ
≦
1; and
where the sum of α
′
, β
′
, γ
′
, and δ
is 1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
-
Specification