Centre National De La Recherche Scientifique

Sorbonne Université

College De France

Universite Toulouse Iii – Paul Sabatier

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

Patrick Rozier

Jean-Marie Tarascon

Biao Zhang

Carole Bourbon

Mathieu Morcrette

Sébastien Patoux

Renaud Bouchet

Mickael Dolle

Abdelmaula Aboulaich

Romain Dugas

Michael Dolle

Virginie Viallet

Vincent Seznec

Laurence Tortet

Erwan Dumont-Botto

The invention relates to a process for the preparation of sodium-based solid compounds, such as sodium-based solid alloys and sodium-based crystalline phases by ball-milling using metallic sodium as starting material. The invention also relates to some sodium-based crystalline P'2-phases and to Na-based vanadium phosphates phases (NaV(PO)) with 0&#x3c;y&#x2264;3 and Na-based vanadium fluorophosphates phases (NaV(PO)F) with 0&#x3c;z&#x2264;3, in particular NaV(PO)F, obtained by such a process and to their use, as active material for positive electrode, in a Na-ion battery.

Method to synthesize Na-based electroactive materials

The present invention relates to a method for producing a positive electrode composite material comprising at least one Na-based positive electrode active material and NaP for a battery using sodium ions as electrochemical vector, to a positive electrode comprising such a positive electrode composite material, and to the Na-ion battery comprising such a positive electrode.

Method for producing a positive electrode composite material for Na ion battery

The present invention relates to a method for preparing a completely solid Li-ion battery having a solid state body wherein the battery is assembled in a single step by stacking at least one layer of a powder mix including a positive electrode active material and a solid electrolyte, at least one intermediate layer of a solid electrolyte and at least one layer of a powder mix including a negative electrode active material and a solid electrolyte, and simultaneous sintering of the three layers at a pressure of at least 20 MPa, under pulsating current. The invention also relates to the Li-ion battery obtained by such a method.

Method for preparing a solid-state battery by sintering under pulsating current

A method of synthesis of a metal fluorophosphate having the following general formula (1): XM(PO)F(1), in which: X is an alkaline metal selected among sodium (Na) and lithium (Li) or a mixture of said metals; M is a transition metal selected among the following elements: Co, Ni, Fe, Mn, V, Cu, Ti, Al, Cr, Mo, Nb or a combination of at least two of said metals, 0&#x2266;a&#x2266;5; 0.5&#x2266;b&#x2266;3; 0.5&#x2266;c&#x2266;3; and d is an integer equal to 1, 2 or 3. The method contains an electric-field-activated sintering process for a mixture (1) formed by at least one first phosphate-containing solid precursor and at least one second fluorine-containing solid precursor.

Metal fluorophosphate synthesis and use as an active material for a battery electrode

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Toulouse, France

Patrick Rozier