# US 2013/0157138 A1 · H4v3o8, a new vanadium(iv) oxide electroactive material for aqueous and non aqueous batteries

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- Number: US 2013/0157138 A1
- Document ID: US20130157138A1
- Status: Published application
- Kind: A1
- Application number: 13/712,119
- Filed: 2012-12-12
- Published: 2013-06-20
- Earliest claimed: 2011-12-20
- Assignees: Belenos Clean Power Holding AG
- Inventors: Yoan METTAN; Reinhard Nesper
- Web page: https://patentgrep.com/patent/US20130157138A1

## CPC

- H01M 4/485: of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence)
- C01G 31/00: Compounds of vanadium
- H01M 4/0404: {by coating on electrode collectors}
- H01M 4/049: {Manufacturing of an active layer by chemical means}
- H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
- H01M 4/625: {Carbon or graphite}
- C01P 2002/20: Two-dimensional structures
- C01P 2002/72: by d-values or two theta-values, e.g. as X-ray diagram
- C01P 2002/76: by a space-group or by other symmetry indications
- C01P 2002/77: by unit-cell parameters, atom positions or structure diagrams
- C01P 2002/88: by thermal analysis data, e.g. TGA, DTA, DSC
- C01P 2004/03: obtained by SEM
- C01P 2004/10: extending in one dimension, e.g. needle-like
- C01P 2006/40: Electric properties
- H01M 10/052: Li-accumulators
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20)
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A new electroactive material of formula H4V3O8 obtainable from H2V3O8 is 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.

## Claims

### Claim 1

H4V3O8 in the form of a layered compound with a structure belonging to the space group Pnma (n62).

### Claim 2 (depends on 1)

H4V3O8 according to claim 1, having refined cell parameters determined by Rietveld refinement for orthorhombic H4V3O8(Pnma, n62) of
a=16.3306b=3.7642c=9.2705
wherein the Rietveld refinement is performed using the refined cell parameters for orthorhombic H2V3O8(Pnma, n62) of a=17.1885, b=3.5796 and c=9.249 as starting point.

### Claim 3 (depends on 1, 2)

H4V3O8 according to claim 1 or 2, wherein it is in the form of fibers having a width of less than 200 nm, preferably about 100 nm and a length of up to about 100 μm, preferably about 10 μm.

### Claim 4 (depends on 1, 2)

H4V3O8 according to claim 1 or 2, that is obtainable by a method comprising treating H2V3O8 with a proton source and a reducing agent in a solvent.

### Claim 5 (depends on 4)

H4V3O8 according to claim 4, wherein the proton source and the reducing agent are selected from
(i) ascorbic acid, or
(ii) ascorbic acid and hydrazine (N2H2.H2O), or
(iii) zinc and H2SO4,
and/or wherein the solvent is water
and/or wherein the treatment is performed at a temperature of 100 to 0° C., preferably 80 to 10° C., more preferably 20 to 30° C., in particular about 25° C.

### Claim 6

H4V3O8 obtainable from H2V3O8.

### Claim 7 (depends on 6)

Use of the compound of claim 6 as electroactive material in aqueous and non aqueous batteries.

### Claim 8 (depends on 7)

The use of claim 7, wherein the electroactive material is used in mixture with nanoparticulate conductive material, in particular conductive carbon black.

### Claim 9 (depends on 7, 8)

A method for producing the electroactive material of claim 7 or 8, wherein H2V3O8 is treated with a proton source and a reducing agent in a solvent.

### Claim 10

A method for producing a cathode wherein H4V3O8 is mixed and homogenized with conductive particles, in particular conductive carbon black, and optionally a preferably nanoparticulate binder, optionally followed by gentle pestling and/or solvent evaporation to obtain desired fibre dimensions and viscosity, and then coating a current collector and drying.

### Claim 11 (depends on 10)

The method of claim 10, wherein the electroactive material is mixed with conductive carbon black in a 7:3 weight-ratio in a solvent, for example THF.