Belenos Clean Power Holding Ag

Belenos Clean Power Holdings Ag

Reinhard Nesper

Tommy Kaspar

Yoann Mettan

Florian Waechter

Rahul Fotedar

Helmer Fjellvåg

Michael Woerle

Frank Krumeich

Yoan Mettan

Semih Afyon

Dipan Kundu

Xiao-Jun Wang

A method for producing conductive carbon coated particles of an at least partially lithiated electroactive core material comprises the step of premixing an oxidant electroactive material with a metallated reductant followed by chemically reacting the oxidant electroactive material with the metallated reductant, said reductant being a coating precursor, said metal being at least one alkaline and/or at least one alkaline earth metal, and said chemically reacting being performed under conditions allowing reduction and metallation of the electroactive material via insertion/intercalation of the alkaline metal cation(s) and/or the alkaline earth metal cation(s) and coating formation via a polymerisation reaction like polyanionic or radicalic polymerisation of the reductant.

Coating and lithiation of inorganic oxidants by reaction with lithiated reductants

An electrode comprises a conductor and an electrode coating, said electrode coating comprising as electronically active material a transition metal (T) oxidenitride of formula LiTTNOin form of nanoparticles, wherein x=0-3, y+z=2-4, y&#x3e;0, z&#x3e;=0.25, m+n=1, m=0-1, n=0-1, Tand Tboth being transition metals of the groups IVB, VB, VIB and VIIB, and periods 3d, 4d and 5d, in particular transition metals selected from Zr, Nb, Mo, Ti, V, Cr, W, Mn, Ni, Co, Fe and Cu. Dependent on the kind of transition metal, its oxidation state and the Li content, such materials may be used as anode materials or as cathode materials, respectively.

Electrode comprising a transition metal oxidenitride or a nitrogen-doped transition metal oxide as electronically active material

An electronically active glass has the composition (TO)-(MO)&#x2014;(Na/LiBO)wherein

V2O5&#x2014;LiBO2, V2O5&#x2014;NiO&#x2014;LiBO2 glasses and their composites obtained by nitrogen doping and reduced graphite oxide blending as cathode active materials

Nanocomposits of conductive, nanoparticulate polymer and electronically active material, in particular PEDOT and LiFePO, were found to be significantly better compared to bare and carbon coated LiFePOin carbon black and graphite filled non conducting binder. The conductive polymer containing composite outperformed the other two samples. The performance of PEDOT composite was especially better in the high current regime with capacity retention of 82% after 200 cycles. Hence an electrode based on composite made of conductive, nanoparticulate polymer and electronically active material, in particular LiFePOand PEDOT nanostubs, with its higher energy density and increased resistance to harsh charging regimes proved to dramatically extend the high power applicability of materials such as LiFePO.

Open porous electrically conductive nanocomposite material

A method for producing colloidal graphene dispersions comprises the steps of: (i) stirring graphite oxide in an aqueous dispersion medium to form a dispersion; (ii) determining if the dispersion is optically clear in a light microscope at 1000 fold magnification after 1 to 5 hours of stirring, and, if not clear, removing any undissolved impurities in the dispersion, in order to form a colloidal graphene oxide dispersion, or a multi-graphene oxide dispersion, that is optically clear in a light microscope at 1000 fold magnification; and (iii) thermally reducing the graphene oxide, or multi-graphene oxide, in dispersion in the aqueous dispersion medium at a temperature between 120&#xb0; C. and 170&#xb0; C. under pressure in order to ensure that the dispersion medium is not evaporated to form a stable colloidal graphene dispersion or a stable multi-graphene dispersion. Using the method used for the preparation of the starting dispersion a graphene or a multi-graphene dispersion is obtained that can be further processed to multi-graphene with larger inter-planar distances than graphite. Such dispersions and multi-graphenes are suitable materials in the manufacturing of rechargeable lithium ion batteries.

Stable dispersions of single and multiple graphene layers in solution

Described is an electrode comprising and preferably consisting of electronically active material (EAM) in nanoparticulate form and a matrix, said matrix consisting of a pyrolization product with therein incorporated graphene flakes and optionally an ionic lithium source. Also described are methods for producing a particle based, especially a fiber based, electrode material comprising a matrix formed from pyrolized material incorporating graphene flakes and rechargeable batteries comprising such electrodes.

Electrode (anode and cathode) performance enhancement by composite formation with graphene oxide

A method for producing conductive carbon coated particles of an at least partially lithiated electroactive core material comprises the step of premixing an oxidant electroactive material with a metallated reductant followed by chemically reacting the oxidant electroactive material with the metallated reductant, said reductant being a coating precursor, said metal being at least one alkaline and/or at least one alkaline earth metal, and said chemically reacting being performed under conditions allowing reduction and metallation of the electroactive material via insertion/intercalation of the alkaline metal cation(s) and/or the alkaline earth metal cation(s) and coating formation via a polymerization reaction like polyanionic or radicalic polymerization of the reductant.

A method for producing colloidal graphene dispersions comprises the steps of: (i) dispersing graphite oxide in a dispersion medium to form a colloidal graphene oxide or multi-graphene oxide dispersion, and (ii) thermally reducing the graphene oxide or multi-graphene oxide in dispersion. Depending on the method used for the preparation of the starting dispersion, a graphene or a multi-graphene dispersion is obtained that can be further processed to multi-graphene with larger inter-planar distances than graphite. Such dispersions and multi-graphenes are, for example, suitable materials in the manufacturing of rechargeable lithium ion batteries.

A new electroactive material of formula HVOobtainable from HVOis described as well as a method for its production, an electroactive cathode coating material comprising this electroactive material, a method for its production and cathodes as well as aqueous and non aqueous, rechargeable and non rechargeable batteries comprising such cathodes.

[object Object]

Described is an anode material which is a transition metal nitride or carbide in form of nanoparticles, preferably a nitride or carbide with one nitrogen or carbon per metal, and especially a nitride or carbide having rock salt structure. A preferred anode material is vanadium nitride, in particular carbon coated vanadium nitride having a mean particle size of &#x3c;500 nm. Embedded in an electrically conducting environment, such nanoparticulate material, in particular the vanadium nitride shows exceptional good charging-discharging cycle stability.

Growing community of inventors

Amden, Switzerland

Reinhard Nesper