Electrode-active anion-deficient lithium transition-metal...

Details Electrode-active anion-deficient lithium transition-metal... Electrode-active anion-deficient lithium transition-metal...

H - Electricity

01

M

H01M 4/58 (2010.01) H01M 10/05 (2010.01) H01M 4/04 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2750328

The present invention provides the electrode active material of an anion-deficient lithium transition metal phosphate compound expressed by the chemical formula Li1-xM(PO4)1-y (0 <= x <= 0.15, 0 < y <= 0.05). The invention provides a method for preparing Li1-xM(PO4)1-y comprising a step wherein a precursor for a lithium transition metal phosphate compound is generated; a step wherein the precursor is mixed under the reaction conditions including a temperature of 200 700°C and a pressure of 180 550 bar to synthesize the anionic deficient lithium transition metal phosphate compound; and a step wherein the resulting product is calcined or granularized and then calcined. In addition, the invention provides an electrochemical device that uses Li1-xM(PO4)1-y as its electrode active material.

L'invention concerne un matériau d'électrode active d'un composé de phosphate de métal de transition-lithium pauvre en anions représenté par la formule Li1-xM(PO4)1-y (0 = x = 0.15, 0 <y = 0.05). L'invention concerne également un procédé pour préparer Li1-xM(PO4)1-y qui comprend les étapes suivantes : génération d'un précurseur de composé de phosphate de métal de transition-lithium; mélange du précurseur dans des conditions de réaction, notamment une température comprise entre 200 et 700°C et une pression comprise entre 180 et 550 bars, pour effectuer la synthèse du composé de phosphate de métal de transition-lithium pauvre en anions; et calcination ou granulation puis calcination du produit résultant. L'invention concerne en outre un dispositif électrochimique qui utilise Li1-xM(PO4)1-y en tant que matériau d'électrode active.

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