Patent ID: 7918904

Claim:
A Method of making a positive electrode comprising the steps of: combining a positive electrode-active material, a binder material that is a water dispersable elastomer, a viscosity modifier that is a water soluble polymer, an aqueous dispersion medium, and a dispersing agent to obtain an electrode paste; coating the electrode paste on a collector; and evaporating the dispersion medium component to obtain the positive electrode; wherein the electrode active material is represented by general formula I Li x MPO 4 (I), in which M is a metal atom of one or more metals selected from the group consisting of Mn, Fe, Co, Ti, Al, and Mo, and 0<x<2; and further wherein the dispersing agent is one or more materials selected from the group consisting of nonionic poly(oxyethylene)-styrenated phenyl ether type surfactants, poly(vinylpyrrolidone), and sodium carboxylate salts.