Dow Global Technolgoies LLC

Toyota Jidosha Kabushiki Kaisha

Thierry Drezen

Ivan Exnar

Bin Li

Steven Kaye

Deidre A Strand

Shrikant N Khot

Jamie L Cohen

Motoshi Isono

Ing-Feng Hu

Murali G Theivanayagam

Xindi Yu

Stacie L Santhany

Ladislav Kavan

Nam Hee Kwon-Roth

Ivo Teerlinck

Christopher P Rentsch

Marketa Zukalova

James Miners

Otakar Frank

Steven S Kaye

Motoshiv c/o Toyota Jidosha Kk Isono

Ivoc/o Toyota Motor Europe NV/SA Teerlinck

Particulate LMFP cathode materials having high manganese contents and small amounts of dopant metals are disclosed. These cathode materials are made by milling a mixture of precursor materials in a wet or dry milling process. Preferably, off-stoichiometric amounts of starting materials are used to make the cathode materials. Unlike other high manganese LMFP materials, these cathode materials provide high specific capacities, very good cycle life and high energies even at high discharge rates.

LMFP cathode materials with improved electrochemical performance

The present invention concerns a carbon coated lithium metal phosphate material containing a manganese oxide layer between the LiMnPO4 material or the C/LiMnZPOmaterial, where Z=Fe, Co, Ni, Mg, Ca, Al, Zr, V, Ti and x=0.01-0.3, and the carbon layer.

Carbon coated lithium manganese phosphate cathode material

Novel process for the preparation of finely divided, nano-structured, olivine lithium metal phosphates (LiMPO) (where metal M is iron, cobalt, manganese, nickel, vanadium, copper, titanium and mix of them) materials have been developed. This so called Polyol' method consists of heating of suited precursor materials in a multivalent, high-boiling point multivalent alcohol like glycols with the general formula HO&#x2014;(&#x2014;CHO&#x2014;), &#x2014;H where n=1-10 or HO&#x2014;(&#x2014;CHO&#x2014;)&#x2014;H where n=1-10, or other polyols with the general formula HOCH&#x2014;(&#x2014;CHOH&#x2014;)&#x2014;H where n=1-10, like for example the tridecane-1,4,7,10,13-pentaol. A novel method for implementing the resulting materials as cathode materials for Li.-ion batteries is also developed.

Synthesis of nanoparticles of lithium metal phosphate positive material for lithium secondary battery

A process for the production of nano-structured olivine lithium manganese phosphate (LiMnPO) electrode material comprising of the following steps: sol gel preparation in a chelating environment; preparation of lithium manganese phosphate/carbon composite by ball-milling; and electrode preparation.

Lithium manganese phosphate positive material for lithium secondary battery

The main object of the invention is to obtain LiMnPOhaving an excellent crystalline and a high purity at a lower temperature. The present invention provides a method for manufacturing LiMnPO4 including the steps of: precipitating for obtaining precipitate of manganese hydroxide (Mn(OH)) by adding a precipitant to a Mn source solution in which a Mn source is dissolved; reducing for obtaining a reduced dispersion solution by dispersing the precipitate in a reducing solvent; adding for obtaining an added dispersion solution by adding a Li source solution and a P source solution to the reduced dispersion solution; pH adjusting for adjusting the pH of the added dispersion solution in the range of 3 to 6 to obtain a pH-adjusted dispersion solution; and synthesizing for synthesizing by reacting the pH-controlled dispersion solution by a heating under pressure condition.

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