Other

Centre National De La Recherche Scientifique

Institut Polytechnique De Grenoble

Politecnico Di Torino

Rockwood Italia Spa

Silvia Bodoardo

Claudio Gerbaldi

Nerino Penazzi

Davide Beneventi

Didier Chaussy

Lara Jabbour

Francesca Di Lupo

Daniela Fontana

Matteo Destro

Giuseppina Meligrana

A method for preparing self-supporting flexible electrodes is provided using refined cellulose fibers as binder. The negative or positive self-supporting flexible electrode is obtained by such method. A Li-ion battery is also provided in which at least one electrode is a self-supporting flexible electrode.

Method for preparing self-supporting flexible electrodes

The present invention relates to a process for the production of LiFePOpowder, comprising the steps: a) providing an aqueous solution of an organic surfactant; b) providing an aqueous solution of an iron (II) salt and mixing said aqueous iron (II) salt solution with an aqueous solution of a phosphate, to provide a mixed iron (II) salt/phosphate solution having a stoichiometric ratio of Fe:phosphate of about 1:1; c) adding the mixed iron (II) salt/phosphate solution to the surfactant solution under constant stirring; d) providing an aqueous solution comprising a lithium salt, adding said aqueous solution comprising a lithium salt to said mixed iron (II) salt/phosphate solution to provide a mixture having a stoichiometric ratio of Fe:phosphate:lithium salt of about 1:1:3 and stirring the resulting mixture; e) heating the resulting mixture at 80-200&#xb0; C.; f) washing the resulting precipitate to remove excess surfactant, filtering and drying the precipitate; and g) heat treating the dried precipitate in an inert atmosphere by firing at 550-850&#xb0; C. for at least 2 hours, wherein a co-solvent is added during or after any one of steps (a) to (d).

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Turin, Italy

Silvia Bodoardo