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US 2019/0088988 A1Published application
Cathode additives to provide an excess lithium source for lithium ion batteries
AssigneeSinode Systems, Inc.
InventorsCary Michael Hayner, Rachid Amine, Christine A. Frysz
Life of this patent
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Abstract
A lithium ion electrochemical cell is described in which the lithium comprising further comprises a lithiation agent. The lithiation agent, which comprises a lithium constituent, is designed to provide an excess source of lithium to minimize capacity loss of the lithium ion electrochemical cell. The anode of the lithium ion cell comprises a material matrix comprising carbon, graphene and an active element such as silicon or tin.
Claims20
An electrochemical cell, comprising:
- a negative electrode comprising a negative electrode active material;
- a positive electrode comprising a positive electrode active material comprising lithium;
- an ionically conductive electrolyte located between the positive electrode and the negative electrode;
- and
- a lithiation agent located in at least one of the positive electrode and the negative electrode, the lithiation agent comprising:
- LiN3;
- Li5FeO4;
- LixMFx, where 0.1≤X≤3 and M is selected from the group consisting of Fe, Mn, Co, Ni, Cu, Vn, Cr, and Bi;
- Li(3−x)MxN, where 0≤X≤0.8 and M is selected from the group consisting of cobalt, nickel, copper, and combinations thereof;
- or
- Li2−x−yZyQxN, where 0.1≤x≤0.8, 0.1≤y≤1, Z is a Li vacancy and Q is selected from the group of elements consisting of Co, Ni, Cu, and combinations thereof.
8 more elements
An electrochemical cell comprising:
- a negative electrode comprising a negative electrode active material;
- a positive electrode comprising a positive electrode active material comprising lithium;
- an ionically conductive electrolyte located between the positive electrode and the negative electrode;
- and
- a lithiation agent located in at least one of the positive electrode and the negative electrode, the lithiation agent comprising LiN3, LiBr, LiI, LiCl, LiOH, Li2O2, Li2C2O4, Li2C2N4O2, Li2C3O5, Li2C4O4, Li2C4O6, Li2CuF2, Li2MnF2, Li2.6Co0.4N, Li3FeF3, Li3MnF3, Li4MoO5, Li5FeO4, Li6MnO4, Li6CoO4, Li8IrO6, LixS where x ranges from about 0.01 to about 2, [(COCON(Li)N(Li)]n, or any combinations thereof.
2 more elements
A positive electrode of an electrochemical cell comprising a mixture of:
- a positive electrode active material;
- and
- a lithiation agent comprising:
- LiN3;
- Li5FeO4;
- LixMFx, where 0.1≤X≤3 and M is selected from the group consisting of Fe, Mn, Co, Ni, Cu, Vn, Cr, and Bi;
- Li(3−x)MxN, where 0≤X≤0.8 and M is selected from the group consisting of cobalt, nickel, copper, and combinations thereof;
- or
- Li2−x−yZyQxN, where 0.1≤x≤0.8, 0.1≤y≤1, Z is a Li vacancy and Q is selected from the group of elements consisting of Co, Ni, Cu, and combinations thereof.
6 more elements
Dependencies are inferred from the claim text.