84results about "Complex cyanides" patented technology

A system and method producing electrodes in an aqueous electrolyte battery that maximizes energy storage, reduces electrochemical decomposition of the electrolyte, and uses Prussian Blue analogue materials for both electrodes, with an anode electrode including an electrochemically active hexacyanometalate group having two possible redox reactions of different potentials. These potentials may be tuned by substituting different electrochemically inactive components.

The present invention relates to sorbants such as metal-organic frameworks (MOFs), covalent organic frameworks (COFs), porous aromatic frameworks (PAFs) or porous polymer networks (PPNs) for separations of gases or liquids, gas storage, cooling, and heating applications, including, but not limited to, adsorption chillers.

A battery is provided with a hexacyanometallate cathode. The battery cathode is made from hexacyanometallate particles overlying a current collector. The hexacyanometallate particles have the chemical formula A_XM1_MM2_N(CN)_Z.d[H₂O]_ZEO.e[H₂O]_BND. where A is a metal from Groups 1A, 2A, or 3A of the Periodic Table, where M1 and M2 are each a metal with 2+ or 3+ valance positions, where “ZEO” and “BND” indicate zeolitic and bound water, respectively, where d is 0, and e is greater than 0 and less than 8. The anode material may primarily be a material such as hard carbon, soft carbon, oxides, sulfides, nitrides, silicon, metals, or combinations thereof. The electrolyte is non-aqueous. A method is also provided for fabricating hexacyanometallate with no zeolitic water content in response to dehydration annealing at a temperature of greater than 120 degrees C. and less than 200 degrees C.

To provide a method of producing Prussian blue-type metal complex nanoparticles without necessarily requiring complicated steps and an excessive amount of raw materials, but allowing one to obtain nanometer-size fine particles having desired fine particle properties, and Prussian blue-type metal complex nanoparticles obtained by the method, a dispersion of the nanoparticles, a method of regulating the color of the nanoparticles, and an electrode and a transmitted light-regulator each using the nanoparticles; Prussian blue-type metal complex nanoparticles are produced by: mixing an aqueous solution containing a metal cyano complex anion having predetermined metal atom M_A as a central metal and an aqueous solution containing a cation of predetermined metal atom M_B, thereby precipitating the crystal of a Prussian blue-type metal complex having the metal atom M_A and the metal atom M_B; and then mixing the Prussian blue-type metal complex with an aqueous solution containing a metal cyano complex anion having the metal atom M_C as a central metal and/or an aqueous solution containing a cation of the metal atom M_D. The thus-obtained Prussian blue-type metal complex nanoparticles have a preferable electrochemical responsiveness, and the particles can be used for forming a thin film including them to construct a light-transmitted regulator.

The invention relates to a Prussian blue sodium ion battery positive electrode material and a preparation method thereof. The method comprises the following steps: dissolving transition metal salt and tartaric acid in deionized water to form a solution A, dissolving sodium ferrocyanide decahydrate and ascorbic acid in deionized water to form a solution B, and dissolving polyvinylpyrrolidone and sodium chloride in deionized water to form a solution C; simultaneously adding the solution A and the solution B into the solution C through a peristaltic pump, and performing stirring while heating in an N2 atmosphere until the solution becomes a suspension liquid after dropwise adding is completed; keeping heating and stirring the suspension for 12 hours, finally aging at room temperature for 24 hours, then centrifugally washing with deionized water and absolute ethyl alcohol for three times respectively, and finally drying in vacuum at 120 DEG C for 24 hours to obtain the Prussian blue positive electrode material.

The invention discloses a preparation method of potassium aurous cyanide, which adopts the following devices: an electrolysis bath, a diaphragm tank, an anode plate and a cathode plate. The anode plate is made of a coated titanium alloy plate and comprises a bottom plate, a lateral plate and an outer plate, wherein the outer plate is fixed with an anode bar. The diaphragm tank is arranged on the upper end face of the bottom plate of the anode plate. The cathode plate comprises a plumbing plate, a transverse plate, and an outer plate, wherein the outer plate is fixed with a cathode bar. The preparation method comprises the following steps: rolling gold into a plurality of flash gold sheets, and then winding and clustering, and then dispersedly placing on the bottom plate of the anode plate around the diaphragm tank; adding a potassium cyanide solution into an anode chamber, adding a potassium hydroxide solution into a cathode chamber, heating to 40-65 DEG C and then electrifying and electrolyzing until the current is broken down. A potassium aurous cyanide solution in the anode chamber after being electrolyzed is post treated to obtain the potassium aurous cyanide. The mass percent of gold in the product prepared by the invention is more than 68.3 percent; moreover, the device can be massively produced.

The invention belongs to the technical field of energy storage devices, and provides a prussian blue transition metal cyanide, a preparation method thereof, and a positive pole piece, a secondary battery, a battery pack and a device related to the prussian blue transition metal cyanide. The prussian blue transition metal cyanide comprises secondary particles, wherein the secondary particles comprise a plurality of primary particles; and the primary particles are in a spherical shape or a sphere-like shape. The prussian blue transition metal cyanide has the problem of relatively low gram volume, so that the energy density of the sodium ion battery is relatively poor, and the commercial application of the sodium ion battery is influenced. The secondary particles can increase the particle granularity and the powder compaction density, can further increase the compaction density of the positive pole piece, and improve the active ion transmission performance and the electronic conductivityof a positive pole piece, so that the energy density and the rate capability of the secondary battery adopting the secondary particles can be improved.

A system, method, and articles of manufacture for a surface-modified transition metal cyanide coordination compound (TMCCC) composition, an improved electrode including the composition, and a manufacturing method for the composition. The composition, compound, device, and uses thereof according to A_xMn_(y-k)M^j_k[Mn^m(CN)_(6-p-q)(NC)_p(Che)^r_q]_z.(Che)^r_w(Vac)_(1-z).nH₂O (wherein Vac is a Mn(CN)_(6-p-q)(NC)_p(Che)^r_q vacancy); wherein Che is an acid chelating agent; wherein: A=Na, K, Li; and M=Mg, Al, Ca, Sc, Ti, V, Cr, Fe, Co, Ni, Cu, Zn, Ga, Pd, Ag, Cd, In, Sn, Pb; and wherein 0<j≦4; 0≦k≦0.1; 0≦(p+q)<6; 0<x≦4; 0≦y≦1; 0<z≦1; 0<w≦0.2; 0<n≦6; −3≦r≦3; and wherein: x+2(y−k)+jk+(m+(r+1)q−6)z+wr=0.

An alkali-ion battery is provided with a transition metal cyanometallate (TMCM) sheet cathode and a non-alkaline metal anode. The fabrication method mixes TMCM powders, conductive additives, and a polytetrafluoroethylene binder with a solution containing water, forming a wet paste. The wet paste is formed into a free-standing sheet of cathode active material, which is laminated to a cathode current collector, forming a cathode electrode. The free-standing sheet of cathode active material has a thickness typically in the range of 100 microns to 2 millimeters. The cathode electrode is assembled with a non-alkaline metal anode electrode and an ion-permeable membrane interposed between the cathode electrode and anode electrode, forming an assembly. The assembly is dried at a temperature of greater than 100 degrees C. The dried assembly is then inserted into a container (case) and electrolyte is added. Thick anodes made from free-standing sheets of active material can be similarly formed.

The invention discloses a preparation method of a manganese-based Prussian white positive electrode material, which comprises the following steps: 1) dissolving a manganese salt containing divalent manganese ions in deionized water to form a solution A; 2) dissolving sodium ferrocyanide in deionized water to form a solution B; (3) dropwise adding the solution A into the solution B, and carrying out a co-precipitation reaction to obtain a suspension solution; and 4) transferring the suspension solution obtained in the step 3) into a reaction kettle, adding a soluble sodium salt, carrying out ahydrothermal reaction for a certain time, and carrying out suction filtration, drying and precipitation to obtain the manganese Prussian white positive electrode material. According to the preparationmethod disclosed by the invention, the morphology and size distribution of the product can be regulated and controlled, and the prepared manganese-based Prussian white has good crystallinity, is applied to electrodes of sodium ion batteries, and can significantly improve the electrochemical performance of the sodium ion batteries, especially can effectively improve the charge-discharge capacity.

Methods are presented for synthesizing metal cyanometallate (MCM). A first method provides a first solution of A_XM2_Y(CN)_Z, to which a second solution including M1 is dropwise added. As a result, a precipitate is formed of A_NM1_PM2_Q(CN)_R·FH₂O, where N is in the range of 1 to 4. A second method for synthesizing MCM provides a first solution of M2_C(CN)_B, which is dropwise added to a second solution including M1. As a result, a precipitate is formed of M1[M2_S(CN)_G]_1/T·DH₂O, where S/T is greater than or equal to 0.8. Low vacancy MCM materials are also presented.

The invention discloses a bimetallic complex catalyst and a preparation method and application thereof. The preparation method of the bimetallic complex catalyst comprises the following steps: separately preparing a mixed microemulsion of water-soluble metal salt and calcium chloride and a mixed microemulsion of water-soluble metal complex and water-soluble sulfate on the premise of ensuring solution transparence; mixing and reacting the two mixed microemulsion at a certain temperature under stirring condition to obtain a mixed microemulsion after reaction; aging and standing for a while to form a layer and particle coexisting structure in the mixed microemulsion obtained after the reaction; washing and centrifuging the mixed solution of organic solvent and water; and drying the precipitate to obtain the bimetallic complex catalyst. The catalyst obtained by the invention has good catalysis effect.

A method of producing a structural member having Prussian blue-type metal complex nanoparticles, the method including: constructing the structural member stabilized by a particular process in producing the structural member by providing nanoparticles consisting of Prussian blue-type metal complex onto a substrate; and a structural member having Prussian blue-type metal complex nanoparticles, the structural member having water-dispersible nanoparticles consisting of Prussian blue-type metal complex provided on a substrate and the structural member being stabilized in water by a particular process.

A method for producing metal complex nanoparticles, the method having: providing an aqueous solution containing a metal cyano complex anion having a metal atom M_A as a central metal, with an aqueous solution containing zinc cation, the pH of the aqueous solution containing zinc cation being adjusted; and mixing the solutions and thereby producing metal complex nanoparticles composed of the metal atom M_A and zinc under controlling the properties of the obtained metal complex nanoparticles.

Potassium cyanide and hydrogen peroxide are added into reaction container at certain speed and the gold potential is controlled in -400 mV to -800 mV during the reaction. The production of KAu(CN)2 in the method of the present invention has fast speed, high efficiency, high quality, less investment and low cost.

Provided is a preparation method of metal cyanide, comprising the following steps: 1) mixing supported metal nanoparticles, a Fenton reagent and nitrile to form suspension, and then stirring, the supported metal nanoparticles being a complex wherein the supporter supports nano metal supports nano metal, nano metal oxide or nano metal salt; and 2) centrifugalizing and drying a product after stirring to obtain the metal cyanide. Also provided are the prepared metal cyanide and the use of same in the fields of sensing, batteries, medicine, electroplating and catalysis. The preparation method does not relate to highly toxic substance CN -, does not require ultraviolet light, is an entirely green method for synthesizing metal cyanide, and applies to industrial production of a large scale.

A tungsten precursor useful for forming tungsten-containing material on a substrate, e.g., in the manufacture of microelectronic devices. The tungsten precursor is devoid of fluorine content, and may be utilized in a solid delivery process or other vapor deposition technique, to form films such as elemental tungsten for metallization of integrated circuits, or tungsten nitride films or other tungsten compound films that are useful as base layers for subsequent elemental tungsten metallization.

The invention discloses a method for producing silver potassium cyanide. The silver potassium cyanide with high purity can be obtained by steps of dissolving, detecting, neutralizing, precipitating, cleaning, detecting, dissolving again, cooling for crystallization, leaching, washing and the like. Compared with conventional production methods, the method for producing silver potassium cyanide is added in multi-time detection and filtering and improved in purity of final product, and vacuum drying is simultaneously performed, so that water content of the obtained silver potassium cyanide is low, and product quality is improved.

A system, method, and articles of manufacture for a surface-modified transition metal cyanide coordination compound (TMCCC) composition, an improved electrode including the composition, and a manufacturing method for the composition according to Formula III—An electrochemical cell including a system having an anode, a cathode, and an electrolyte wherein the anode includes a material, including the material including at least one composition represented by Formula III: A_xMn_y[Mn(CN)₍₆₎]_z(Vac)_(1-z).n(H₂O)m(Che) wherein, in Formula III, A includes one or more alkali metals including Na; and wherein 0<j≤4, 0≤k≤0.1, 1.2<x≤4, 0<y≤1, 0.8<z≤1, 0<n≤4; 0≤m≤0.2 and wherein x+2y−4z=0.

A first method for fabricating an anode for use in sodium-ion and potassium-ion batteries includes mixing a conductive carbon material having a low surface area, a hard carbon material, and a binder material. A carbon-composite material is thus formed and coated on a conductive substrate. A second method for fabricating an anode for use in sodium-ion and potassium-ion batteries mixes a metal-containing material, a hard carbon material, and binder material. A carbon-composite material is thus formed and coated on a conductive substrate. A third method for fabricating an anode for use in sodium-ion and potassium-ion batteries provides a hard carbon material having a pyrolyzed polymer coating that is mixed with a binder material to form a carbon-composite material, which is coated on a conductive substrate. Descriptions of the anodes and batteries formed by the above-described methods are also provided.

The invention discloses a prussian blue analogue and a preparation method, a negative electrode material and application thereof, which belong to the field of new energy batteries. The chemical formula of the Prussian blue analogue is KxMn[R(CN)6]1-y<vacancy>y.nH2O, x is more than or equal to 0 and less than or equal to 2, y is more than 0.3 and less than 1, and vacancy is a [R(CN)6] vacancy. The negative electrode material composed of the Prussian blue analogue is obtained at a rapid crystallization rate, and has relatively high crystal water content (24wt%) and relatively long Mn-N bond length (2.214 angstrom). The material has the advantages of being low in cost, environmentally friendly and high in Li storage capacity, transfer of 5 mol electrons can be achieved under the low potential, breakage and recombination of Mn-N bonds are involved, and stable circulation can be conducted for 1000 cycles or above with the high reversible capacity of 480 mAh g<-1> under the high current density of 1A g<-1>.

The invention relates to a carbon quantum dot-CoFe Prussian blue nanocomposite material as well as a preparation method and application thereof, and belongs to the technical field of electrode material preparation. The preparation method is a two-step synthesis method and comprises the steps: firstly, taking potassium citrate as a carbon source of carbon quantum dots, controlling the dosage of potassium citrate, hydrothermal synthesis temperature, hydrothermal synthesis time and other reaction conditions, and preparing a carbon quantum dot solution through a hydrothermal synthesis method; thentaking carbon quantum dots, inorganic cobalt salt and potassium ferricyanide as reaction raw materials, preparing the carbon quantum dot-CoFe Prussian blue composite material with good dispersity byadopting a liquid-phase coprecipitation reaction method, and enabling the size of nanospheres to be about 200-400 nm. When the carbon quantum dot-CoFe Prussian blue composite material prepared by themethod is used as an electrode material, the capacity of a supercapacitor is improved, the rapid charging and discharging capacity of the supercapacitor is greatly improved, and the supercapacitor hasexcellent rate capability and long cycle service life.