Commissariat a L'energie Atomique

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Gilles Gauthier

Frederic Le Cras

Carole Bourbon

Thibaud Delahaye

Helene Lignier

Jean-Louis Gabelle

Severine Si Larbi Jouanneau

Materials of the titanate type of perovskite or derived structure and their uses for the production of electrodes, more particularly in the cell elements of an SOFC cell or the cell elements of a high-temperature steam electrolysis cell.

Titanates of perovskite or derived structure and applications thereof

The present invention relates to a process for preparing composite materials comprising an electrode active compound of formula ADMZONF, such as an alkali metal ion, such as a lithium ion, insertion compound, and an electronically conducting compound, such as carbon, in which a homogeneous mixed precursor containing all the elements A, D, M, Z, O, N and F forming the electrode active compound and also one or more organic and/or organometallic compounds are thermally decomposed, in a short period of time, so as to obtain the composite material. These composite materials in particular find their application in devices containing said compounds and/or active materials, such as electrochemical devices and batteries, in particular lithium batteries.

Method for preparing composite materials comprising an electrode active compound and an electronic conductor such as carbon in particular for a lithium battery

A lithium storage cell comprises at least a first electrode comprising an active material wherein Lications can be inserted, a second electrode and an electrolyte. The active material of the first electrode comprises a linear condensed compound comprising at least two tetrahedra, respectively of AOand A'Otype, bonded by a common oxygen atom. A transition metal ion Mwith a degree of oxidation of +2 selected from the group consisting of Ni, Co, Mn, Feand Tiis inserted in the linear condensed compound, and the ratio between the number of Lications able to be inserted in the active material and the number of transition metal ions Mis strictly greater than 1. A and A&#x2032; are selected from the group consisting of P, Si, Al, S, Ge, B.

Lithium storage cell presenting both a high electrical potential and a high lithium insertion capacity

Growing community of inventors

Bilieu, France

Gilles Gauthier