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

Renault S.a.s.

Fundacion Centro De Investigacion Cooperativa De Energias Alternativas Cic Energigune Fundazioa

Lucienne Buannic

Jean-François Colin

Michel Bernard Armand

Lise Daniel

Teofilo Rojo

Mohamed Chakir

Frederic Aguesse

Gurpreet Singh

Pedro Lopez

Laida Otaegui Ameztegui

Marlène Rey

A Li-ion battery cell includes cathode and anode materials, a separator, and an electrolyte including a mixture of a polyethylene oxide and an oxide of formula LivLasZnOn. A method of forming the cell includes the following successive cycling steps: (a) at least two successive charge and discharge cycles of the cell at a first cycling rate C/x, the charge/discharge steps being limited in time to x/2; (b) at least two successive charge and discharge cycles of the cell at a second charging rate C/y, different from the first cycling rate, where y is lower than x, the charge/discharge steps being limited in time to y/2; and (c) at least two successive charge and discharge cycles of the cell at a third cycling rate C/z different from the first and second charging rates, where z is lower than x and y, the charge/discharge steps being limited in time to z/2.

Method for forming a Li-ion battery cell

The present invention relates to a sodium-ion battery comprising a positive electrode compartment comprising a positive electrode, said positive electrode comprising a Na-insertion compound; a negative electrode compartment comprising a negative electrode, said negative electrode comprising metallic sodium; and an electrolyte composition comprising a solid sodium-ion conductive ceramic electrolyte and a catholyte comprising a metallic salt with formula MY, wherein M is a cation selected from an alkali metal and an alkali-earth metal; and Y is an anion selected from [RSONSOR], CFSO, C(CN), B(CO)and BF(CO), wherein Rand Rare independently selected from fluorine or a fluoroalkyl group. The device is able to operate below the melting point of the anode component.

Sodium ceramic electrolyte battery

A lithium-free mixed titanium and niobium oxide, including at least one trivalent metal M, and having a molar ratio Nb/Ti greater than 2, said oxide being selected from the group including the material of formula (I) and the material of formula (II):MTiNbO&#x2003;&#x2003;(I) where 0&#x3c;&#x2266;0.20; &#x2212;0.3&#x2266;&#x3b4;&#x2266;0.3;MTiNbO&#x2003;&#x2003;(II) where 0&#x3c;&#x2266;0.40; &#x2212;0.3&#x2266;&#x3b4;&#x2266;0.3.

Mixed oxide of titanium and niobium comprising a trivalent metal

A method of preparing a titanium and niobium mixed oxide including the steps of: preparing a titanium and niobium mixed oxide in amorphous form by a solvothermal treatment of at least one titanium precursor and of at least one niobium precursor, mechanically crushing the titanium and niobium mixed oxide obtained at the end of the solvothermal treatment and calcinating the mixed oxide obtained after crushing.

Method for preparing a titanium and niobium mixed oxide by solvothermal treatment; electrode and lithium accumulator comprising said mixed oxide

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Suresnes, France

Lucienne Buannic