Abstract: An electrochemical device includes an electrochemical cell, wherein the electrochemical cell including a first anode and a first electrolyte, and a supercapacitor, wherein the supercapacitor including a second anode and a second electrolyte. The electrochemical cell and the supercapacitor are arranged in series and a single cathode shared both by the electrochemical cell and by the supercapacitor, while the first anode and the second anode are connected directly to each other; the single cathode comprises a porous matrix, wherein an active substance belonging to the group of Chalcogens, or group 16, of the Periodic Table of the Elements is infused inside the porous matrix. The electrochemical device is configured to accumulate and deliver simultaneously high levels of both an energy higher than 500 Wh/kg and a power higher than 1,000 W/kg) making a current flow independently into the electrochemical cell or into the supercapacitor depending on energy needs.

Abstract: 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.

Abstract: The present invention relates to a process for the production of LiFePO4 powder, 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 Fe2+: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 Fe2+:phosphate:lithium salt of about 1:1:3 and stirring the resulting mixture; e) heating the resulting mixture at 80-200° C.

Abstract: The present invention relates to a method for preparing self-supporting flexible electrodes by a method that implements refined cellulose fibres as binder. It relates also to the negative or positive self-supporting flexible electrode obtained by such a method and an Li-ion battery in which at least one electrode is a self-supporting flexible electrode.

Abstract: The present invention relates to a process for the production of LiFePO4 powder, 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 Fe2+: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 Fe2+:phosphate:lithium salt of about 1:1:3 and stirring the resulting mixture; e) heating the resulting mixture at 80-200° C.