Fundacion Centro De Investigacion Cooperativa De Energias Alternativas Cic Energigune Fundazioa

Devaraj Shanmukaraj

Teofilo Rojo

Sylvie Grugeon

Michel Armand

Hicham Ben Youcef

Brahim Orayech

Damien Saurel

Maria Arnaiz Gonzalez

Jon Ajuria Arregi

Daniel Carriazo Martin

Daniel Carriazo MARTÍN

María Arnaiz GONZÁLEZ

Stéphane Laruelle

A metal ion capacitor with outstanding power capabilities having a negative electrode based on hard carbon (HC) and a positive electrode based on a combination of activated carbon (AC) and a sacrificial salt selected from the group consisting of squarate, oxalate, ketomalonate and di-ketosuccinate or a combination thereof. The sacrificial salt is added to AC in the positive electrode as a source of metal ions for pre-doping the HC and to efficiently compensate its high irreversible capacity by providing the metal ions necessary for the formation of solid electrolyte interphase (SEI) on the hard carbon, allowing for a 1:1 and superior mass balances between anode and cathode. Advantageously, the extraordinary performance of this approach has been successfully demonstrated not only in lithium ion capacitors (LICs) but also in other metal ion capacitors such as sodium and potassium ion capacitors.

Metal ion capacitor based on hard carbon as negative electrode and a mixture of activated carbon and sacrificial salt as the positive electrode

The present invention refers to a method for preparing a solid polymer electrolyte based on modified cellulose, the method comprising the steps of: a) lithiation or sodiation of at least a hydroxyl group of each repeating unit of a 'cellulose' to obtain Li(cellulose) or Na(cellulose); b) functionalization of the Li(cellulose) or Na(cellulose) obtained in step a), in the presence of an aprotic solvent by reacting it with an organic linker, wherein the organic linker serves to covalently attach at least one organic salt to the 'cellulose', and the use of the solid polymer electrolyte in lithium or sodium secondary batteries.

Solid polymer electrolyte based on modified cellulose and its use in lithium or sodium secondary batteries

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Alava, Spain

Devaraj Shanmukaraj