Abstract: A method for preparing coated metal nanoparticles, each nanoparticle comprising a core constituted of at least one metal M and a layer constituted of at least one polymer, the layer coating the metal core. The method comprises the steps: (a1) preparing a solution A comprising the at least one metal M in the form of cations Mn+, n being an integer comprised between 1 and 3, each metal M being a transition metal of atomic number comprised between 21 and 30, a polyol, and a noble metal salt; (a2) preparing a solution B comprising at least one organic monomer of the at least one polymer, in an organic solvent; (b) mixing solutions A and B, this mixture being heated to the boiling temperature of the polyol; and (c) recovering the coated metal nanoparticles.

Abstract: The invention relates to an electrode for a lithium battery, comprising an electrochromic material as active material, and metal nanowires as electroconductive additive. Use of said electrode for making energy storage devices, the state of charge of which can be determined by calorimetric monitoring.

Abstract: A method for preparing coated metal nanoparticles, each nanoparticle comprising a core constituted of at least one metal M and a layer constituted of at least one polymer, the layer coating the metal core. The method comprises the steps: (a1) preparing a solution A comprising the at least one metal M in the form of cations Mn+, n being an integer comprised between 1 and 3, each metal M being a transition metal of atomic number comprised between 21 and 30, a polyol, and a noble metal salt; (a2) preparing a solution B comprising at least one organic monomer of the at least one polymer, in an organic solvent; (b) mixing solutions A and B, this mixture being heated to the boiling temperature of the polyol; and (c) recovering the coated metal nanoparticles.

Abstract: The present invention relates to a process for the preparation of boron carbide nanoparticles, characterized in that it comprises at least the stages consisting in: (i) interacting boric acid, boron oxide B2O3 or a boric acid ester of B(OR)3 type, with R, which are identical or different, representing C1-4-alkyl groups, with 1 to 2 molar equivalents of at least one C2 to C4 polyol, under conditions favorable to the formation of a boron alkoxide powder; (ii) interacting, in an aqueous medium, the boron alkoxide powder obtained on conclusion of stage (i) with an effective amount of one or more completely hydrolyzed polyvinyl alcohols, with a molar mass of between 10 000 and 80 000 g.mol?1, under conditions favorable to the formation of a crosslinked PVA gel, and (iii) carrying out an oxidizing pyrolysis of the crosslinked gel formed on conclusion of the preceding stage (ii), under conditions favorable to the formation of the CB4 nanoparticles.

Abstract: The invention relates to a thermally conducting capsule which has a core-shell structure and in which the core, which is surrounded by a tight single-layer or multilayer shell, is loaded with at least one phase change material (PCM). The invention is characterized in that the capsule also contains particles made of an additional conducting material at least in the shell, said particles made of the additional conducting material having a thermal conductivity greater than 100 W/m/K. The invention further relates to the use of said capsule in a heat-conducting material, in particular a thermal fluid, in order to modulate the heat capacity thereof.