Methods and systems for salt-rinse surface doping of electrode materials

A method, comprising:

• dissolving a dopant salt in a rinsing solvent to form a dopant salt rinse solution;
• rinsing an electrode active material with the dopant salt rinse solution to obtain a uniformly surface-coated electrode active material, wherein rinsing the electrode active material with the dopant salt rinse solution to obtain the uniformly surface-coated electrode active material comprises:
• mixing the electrode active material with the dopant salt rinse solution to form a mixture, wherein mixing the electrode active material with the dopant salt rinse solution comprises:
• dissolving a residual lithium salt on a surface of the electrode active material;
• and
• precipitating a dopant precipitate on the surface of the electrode active material while producing a product salt, where the dopant precipitate is formed from a cation of the dopant salt and an anion of the residual lithium salt, where the product salt is formed from lithium and an anion of the dopant salt is soluble in the dopant salt rinse solution, and where the dopant precipitate has a lower solubility in the dopant salt rinse solution than each of the residual lithium salt and the product salt;
• filtering the mixture to isolate a filtrate;
• and
• drying the filtrate to obtain the uniformly surface-coated electrode active material;
• and
• heating the uniformly surface-coated electrode active material to form a uniformly surface-doped electrode active material.