Centre National De La Recherche Scientifique

Umicore

Saft

Saft Groupe Sa

Julien Breger

Philippe Biensan

Claude Delmas

Stephane Levasseur

Cécile Tessier

Laurence Croguennec

Frederic Castaing

Frédéric Castaing

Olivier Jan

Bridget Deveney

Kamen Nechev

Jessica Bains

A composition including (a) a lithiated oxide of transition metals containing at least nickel, cobalt and aluminum and (b) a lithiated phosphate of at least one transition metal, the surface of which is at least partially covered by a layer of carbon. In the composition, the proportion by mass of the lithiated oxide of transition metals containing at least nickel, cobalt and aluminum is less than or equal to 10% of the weight of the composition, and the proportion by mass of the lithiated phosphate of at least one transition metal is greater than or equal to 90% of the weight of the composition. A lithium-ion or lithium-polymer type accumulator including at least one positive electrode containing this composition.

Positive electrode material for lithium-ion accumulator

A compound of formula Li(NiMnCoAl)Owherein: a, b and c are non-zero; a+b+c+y=1; 1.05&#x2266;(1+x)/(1&#x2212;x)&#x2266;1.25; 0.015&#x2266;y(1&#x2212;x); and the atomic amount of manganese representing from 95% to 100% of the atomic amount of nickel.

Positive electrode material for a lithium ion accumulator

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Bordeaux, France

Julien Breger