Back to results
US 11,962,002 B2Granted
Cathode materials having oxide surface species
AssigneeQuantumScape Battery, Inc.
InventorsCheng-Chieh Chao, Sarah Chavez, Hyeseung Chung, Seitaro Ito, Yuki Katoh, Konstantin Lokshin, Akinari Ohash, Jessa Silver, Yaosen Tian, Virgil Xu, Zhenfeng Yu
Life of this patent
Estimating the term…
Abstract
The present disclosure concerns lithium zirconium phosphate (LZP) chemical oxides for coated cathode active materials, which are useful in cathodes (i.e., positive electrodes) of rechargeable lithium-batteries for reversibly storing lithium ions (Li+).
Claims19
A composition comprising:
- a cathode active material;
- and
- at least one oxide bonded to the cathode active material;
- wherein the at least one oxide bonded to the cathode active material comprises lithium (Li), oxygen (O), and at least one of zirconium (Zr) and phosphorus (P);
- wherein the molar ratios of Li, Zr, P, and O, are represented by the formula LixZryPaOd, wherein 0.05≤x≤25.0, 0≤y≤5.0, 0≤a≤16.0;
- and 2.0≤d≤55.0;
- and
- wherein subscripts x, y, a, and d, are selected so the at least one oxide is charge neutral and y and a are not both zero;
- wherein the composition has a ratio of Zr:Ni, as measured by x-ray photoelectron spectroscopy (XPS) of 0.3 to 3.2;
- and
- wherein the cathode active material is LiNixMnyCozO2, x+y+z=1, 0≤x≤1, 0≤y≤1, and 0≤z≤1;
- and
- wherein the composition comprises between about 5 weight % and 10 weight % of lithium as measured by inductively coupled plasma (ICP) analysis, less than about 1 weight % of zirconium as measured by inductively coupled plasma (ICP) analysis, less than about 0.5 weight % of phosphorus as measured by inductively coupled plasma (ICP) analysis, less than about 65 weight % of manganese, cobalt, and nickel as measured by inductively coupled plasma (ICP) analysis, or a combination thereof.
10 more elements
An oxide having the following formula, LixZryPaOd, wherein 0.05≤x≤25.0, 0≤y≤5.0, 0≤a≤16.0;
- and 2.0≤d≤55.0;
- wherein the formula is charge neutral and wherein the oxide is bonded to cathode active material selected from lithium cobalt oxide (LCO), lithium nickel cobalt aluminum oxide (NCA), lithium nickel manganese cobalt oxide (NMC), lithium iron phosphate (LFP), and combinations thereof.
Dependencies are inferred from the claim text.