According to the present disclosure, a method for synthesizing a free-standing flexible electrode is provided. The method includes the steps of mixing a solution comprising vanadium powder, molybdenum powder and hydrogen peroxide to form a mixture comprising nanofibers represented by the formula of V.sub.0.07Mo.sub.0.93O.sub.3nH.sub.2O, filtering the mixture to form an electrode comprising the nanofibers, treating the electrode with an acidic solution, contacting the acid-treated electrode with a solution comprising monomers of a conductive polymer, and polymerizing the monomers in a medium comprising an oxidizing agent to form the conductive polymer. According to the present disclosure, there is also a free-standing flexible electrode comprising nanofibers comprised of molybdenum, vanadium and a conductive polymer, wherein the electrode is represented by a formula of XV.sub.0.07Mo.sub.0.93O.sub.3n-H.sub.2O. In this formula, X is the conductive polymer and n is independently 1 or 2. According to the present disclosure, storage devices comprising the electrode as defined above, are also provided.

The present specification relates to a preparation method for rod-shaped molybdenum oxide and a preparation method for a molybdenum oxide composite, the preparation method for rod-shaped molybdenum oxide according to the present invention may be carried out under low temperature and pressure conditions, and thus has an advantage in that it is possible to mass produce rod-shaped molybdenum oxide, and the preparation method for a molybdenum oxide composite according to the present invention has an advantage in that the molybdenum oxide composite may be synthesized at a temperature which is equal to or less than the boiling point of ethanol, and the amount of an ethanol solvent used is reduced.

The present specification relates to a preparation method for rod-shaped molybdenum oxide and a preparation method for a molybdenum oxide composite, the preparation method for rod-shaped molybdenum oxide according to the present invention may be carried out under low temperature and pressure conditions, and thus has an advantage in that it is possible to mass produce rod-shaped molybdenum oxide, and the preparation method for a molybdenum oxide composite according to the present invention has an advantage in that the molybdenum oxide composite may be synthesized at a temperature which is equal to or less than the boiling point of ethanol, and the amount of an ethanol solvent used is reduced.

The present invention is related to a method for preparing VIB Group metal oxide particles or dispersions, wherein the VIB Group metal is tungsten or molybdenum. The methods include: 1) providing precursors of VIB Group metal oxide, reductants and supercritical fluids. 2) said VIB Group metal oxide particles, or dispersions are obtained by the reaction between said metal oxide precursors, and reductants are under supercritical state in said supercritical fluids. Especially, said VIB Group metal oxide can be tungsten bronze, molybdenum bronze, or tungsten and molybdenum bronze which can be present by the formula A.sub.xB.sub.yMO.sub.z. Wherein, A represents element exists in the form of dopant cation; and B represents element exists in the form of dopant anion; O represents oxygen; 0?x?1, 0?y?1, 0<x+y?1, and 2?z?3. The said VIB Group metal oxide particles and dispersions can be applied to the glasses of houses, buildings, automobiles, ships etc, with high transparency and NIR and UV lights shielding properties, by which the control of sunlight and heat radiation can be achieved.

The present invention is related to a method for preparing VIB Group metal oxide particles or dispersions, wherein the VIB Group metal is tungsten or molybdenum. The methods include: 1) providing precursors of VIB Group metal oxide, reductants and supercritical fluids. 2) said VIB Group metal oxide particles, or dispersions are obtained by the reaction between said metal oxide precursors, and reductants are under supercritical state in said supercritical fluids. Especially, said VIB Group metal oxide can be tungsten bronze, molybdenum bronze, or tungsten and molybdenum bronze which can be present by the formula A.sub.xB.sub.yMO.sub.z. Wherein, A represents element exists in the form of dopant cation; and B represents element exists in the form of dopant anion; O represents oxygen; 0?x?1, 0?y?1, 0<x+y?1, and 2?z?3. The said VIB Group metal oxide particles and dispersions can be applied to the glasses of houses, buildings, automobiles, ships etc, with high transparency and NIR and UV lights shielding properties, by which the control of sunlight and heat radiation can be achieved.

An electrochemical cell includes a cathode including an early transition metal fluoro-bronze; an anode including magnesium metal; and an electrolyte; wherein: the early transition metal fluoro-bronze is configured for intercalation of magnesium ions.

An electrochemical cell includes a cathode including an early transition metal fluoro-bronze; an anode including magnesium metal; and an electrolyte; wherein: the early transition metal fluoro-bronze is configured for intercalation of magnesium ions.

The present invention provides a method for preparing an anode active material for a nonaqueous lithium secondary battery, comprising the steps of: preparing a carbon-based material; forming a precursor coating layer comprising Me and A (wherein A is O or S) on the surface of the carbon-based material; supplying a P precursor to the precursor coating layer of the carbon-based material; and converting at least a part of the precursor coating layer into a compound represented by Me.sub.x1P.sub.y1 (wherein x1>0 and y1>0) by the reaction of the precursor coating layer and the P precursor, thereby forming a phosphide coating layer, wherein Me is at least one type of the same metal element selected from among Mo, Ni, Fe, Co, Ti, V, Cr, Nb and Mn.

The present invention provides a method for preparing an anode active material for a nonaqueous lithium secondary battery, comprising the steps of: preparing a carbon-based material; forming a precursor coating layer comprising Me and A (wherein A is O or S) on the surface of the carbon-based material; supplying a P precursor to the precursor coating layer of the carbon-based material; and converting at least a part of the precursor coating layer into a compound represented by Me.sub.x1P.sub.y1 (wherein x1>0 and y1>0) by the reaction of the precursor coating layer and the P precursor, thereby forming a phosphide coating layer, wherein Me is at least one type of the same metal element selected from among Mo, Ni, Fe, Co, Ti, V, Cr, Nb and Mn.

A molybdic acid solution is provided containing 0.1 to 40.0 mass % of molybdenum in terms of MoO.sub.3, and has a particle size of 20 nm or less as measured by particle size distribution measurement using a dynamic light scattering method. A production method of the molybdic acid solution includes a step of adding an acidic molybdenum aqueous solution containing 1 to 100 g/L of molybdenum in terms of MoO.sub.3 to a 10 to 30 mass % ammonia aqueous solution to generate a molybdenum-containing precipitate, and a step of adding an organic nitrogen compound to a molybdenum-containing precipitation slurry in which the molybdenum-containing precipitate is formed into a slurry state to generate a molybdic acid solution.