92results about "Hybrid cells" patented technology

When potassium hydroxide (KOH) or other activating agents are used to activate carbon, the hydrochloric acid used to remove it may damage the stainless steel equipment used in the process. Herein, water and citric acid are used to wash the carbon after its activation to reduce damage to the equipment. Prior to activation, a slurry of coal, petroleum coke or other carbonaceous material mixed with water and KOH is dried in layers. During drying, the KOH repeatedly precipitates as a crust on the layers and is repeatedly blended back into the mixture. Activation temperature and duration may be selected to control the pore size distribution in the activated carbon.

The invention belongs to the technical field of lithium-carbon dioxide batteries, and particularly relates to a lithium-carbon dioxide battery positive electrode catalyst, a preparation method and a lithium-carbon dioxide battery. Comprising the following steps: taking iron, cobalt, nickel and copper as templates, respectively grinding and mixing with 1, 2, 4, 5,-tetracyanobenzene, sintering under a vacuum condition, respectively coordinating the 1, 2, 4, 5,-tetracyanobenzene with metal ions to form polymer monomers, and polymerizing the polymer monomers to form iron polyphthalocyanine, thereby obtaining the lithium-carbon dioxide battery positive electrode catalyst. The iron polyphthalocyanine is adopted as the positive electrode catalyst of the lithium-carbon dioxide battery, so that the generation of lithium oxalate is realized, the discharge voltage is improved to be higher than a theoretical value 3.01 V, the charging voltage is reduced, and the energy efficiency of the battery is improved.

The invention belongs to the technical field of air power supplies, and relates to modification treatment of an oxide, in particular to a cerium oxide doped transition metal oxide and a preparation method thereof, an air cathode and an air power supply. The preparation method comprises the following steps: dissolving cerium salt, cobalt salt and manganese salt in water, uniformly mixing to obtain a mixed solution, adjusting the pH value of the mixed solution to 9-11, and carrying out a sedimentation reaction to obtain a sediment; and drying the precipitate, and calcining in an air atmosphere at 300 + / -10 DEG C for 2-4 hours to obtain the cerium oxide doped transition metal oxide. The cerium oxide doped transition metal oxide is cerium doped cobalt manganese oxide with a spinel structure, and the doping amount of cerium is 20 + / -1wt%. The cerium oxide doped transition metal oxide provided by the invention is applied to an air cathode as a catalyst, and has good stability and high catalytic activity. The performance of an air power supply containing the oxide is remarkably improved. The method for preparing the oxide provided by the invention is simple and easy to operate, and is suitable for large-scale production.

The invention relates to a nitrogen-tellurium co-doped carbon-loaded cobalt-lanthanum-gallium triatomic oxygen reduction catalyst as well as a preparation method and application thereof. The catalyst comprises a carbon carrier, doped nitrogen atoms, doped tellurium atoms, supported cobalt atoms, supported lanthanum atoms and supported gallium atoms, wherein the doping proportions of nitrogen atoms and tellurium atoms in the carrier are 3.63 wt%-6.96 wt% and 2.11 wt%-3.83 wt% respectively, the loading capacity of cobalt atoms is 0.86 wt%-1.05 wt%, the loading capacity of lanthanum atoms is 0.38 wt%-0.47 wt%, and the loading capacity of gallium atoms is 0.21 wt%-0.47 wt%; in the preparation method, the nitrogen-tellurium co-doped carbon carrier is fully anchored and coordinated to Co and La atoms through a hydrothermal reaction; and through freeze drying, collapse of a carbon skeleton of the catalyst can be effectively avoided. The obtained catalyst shows good oxygen reduction activity in a solid zinc-air battery, and the peak power density of the catalyst reaches up to 1.68 mW cm <-2 >.

The invention discloses a positive electrode photocatalytic material for a solid-state battery, a preparation method of the positive electrode photocatalytic material, a battery positive electrode and the solid-state battery. The positive electrode photocatalytic material comprises a one-dimensional semiconductor nano array composite structure containing vacancies / defects, the one-dimensional semiconductor nano array composite structure comprises an oxide semiconductor nano array structure containing oxygen vacancies / defects or a sulfide semiconductor nano array structure containing sulfur vacancies / defects; the multi-element alloy nano-particles are binary alloy particles and / or high-entropy alloy particles with more than three elements, and the sizes of the binary alloy particles and / or the high-entropy alloy particles are in sub-nanometer and nanometer scale ranges; and the multi-element alloy nano particles are assembled on the one-dimensional semiconductor nano array composite structure. According to the invention, the photocatalytic characteristic of the low-dimensional semiconductor nano array structure is coupled with the plasmon effect of the multi-component alloy nano particles, so that the wide-spectrum strong absorption of sunlight and the efficient light-heat-electric energy synergistic conversion are realized.

The invention discloses preparation and application of a heterogeneous element doped oxide composite catalyst. The preparation method comprises the following steps: stirring an iron source, carbon nanotubes and triton in a solvent, adding a sodium borohydride solution at 2-10 DEG C, and rapidly stirring and uniformly mixing; aging the solution at 2-10 DEG C, collecting a sample, washing and drying; carrying out heat treatment to obtain a gamma-Fe2O3 precursor loaded on the carbon nano tube; stirring the gamma-Fe2O3 precursor loaded on the carbon nano tube and a heterogeneous element source in a solvent, evaporating to dryness and grinding; and performing heat treatment to obtain the composite catalyst. The gamma-Fe2O3 and carbon nanotube in-situ loaded composite material is used as a precursor, the structural stability of the substrate is effectively improved, meanwhile, the intrinsic catalytic activity of the gamma-Fe2O3 can be effectively improved through doping of multi-element heterogeneous elements, and compared with a fractional-step doping strategy, higher catalytic activity and higher utilization value are shown.

The invention discloses a two-dimensional carbon-based catalyst material as well as a preparation method and application thereof, and belongs to the technical field of catalyst preparation. The preparation method comprises the following steps: by taking aniline as a carbon source and a nitrogen source, initiating oxidative polymerization by ammonium persulfate in a perchloric acid solution containing a metal precursor to generate metal-doped polyaniline; and heating the polymer to induce an explosion reaction so as to realize rapid stripping and carbonization of polyaniline and finally obtain the two-dimensional carbon-based material. The method provided by the invention has the advantages of low initiation temperature, extremely short reaction time and remarkable energy-saving advantage, the obtained material shows excellent catalytic performance and good stability in various systems such as energy conversion and electro-catalytic synthesis as an electrode catalyst, and the preparation process is low in raw material cost, simple to operate, low in energy consumption, small in environmental pollution and suitable for industrial production. And the method has a good large-scale application prospect.

The disclosure relates to an ionic liquid additive that is useful in an electrolyte solution for an electrochemical device. The ionic liquid additive is capable of interacting with polyiodide and / or polybromide species to mitigate shuttle effect for the electrochemical device and stabilise the positive electrode and the negative electrode of the electrochemical device.

The invention relates to the field of metal fuel cells, and discloses an emergency aluminum air cell lighting rod which comprises a lighting unit, a cell unit and a liquid injection unit, the cell unit comprises a shell, a reaction cavity is formed in the shell, a sealing cover is arranged at the top of the shell, a waterproof breathable structure is arranged on the sealing cover, and a negative plate is arranged in the reaction cavity. An air electrode is arranged on the outer side of the negative plate, a grid is arranged on the outer side of the air electrode, an electrolyte bag is arranged between the negative plate and the air electrode, the negative plate, the air electrode and the lighting unit are connected through wires, and sealing anti-corrosion parts are arranged at the joints; the liquid injection unit comprises a push rod and a firing pin, the push rod is slidably connected to the bottom of the shell, the firing pin is fixed to the push rod, a liquid injection hole communicated with the reaction cavity is formed in the bottom of the shell, a sealing plug is sealed in the liquid injection hole, and the push rod is connected with a limiting assembly. The problems that in the prior art, electrolyte is prone to leakage, the output power is low, and a circuit is prone to poor contact can be solved.

Methods and systems of changing ion concentrations in a water, involving extracting and providing ions from and to water masses or aliquots, where extracting and providing said ions may motivate partitioning of CO2 into the water.

The present application provides a kind of carbon fiber material and its preparation method and application in CO2 capture and electrocatalytic conversion.The present application creatively combines macro-scale hierarchical porous structure for enhanced mass transfer, atomic-level carbon vacancy defects for enhanced CO2 adsorption and activation, and molecular-level Ni-N X S Y Asymmetric active sites are integrated in one. This multiscale synergistic design enables the catalyst to simultaneously address both low CO2 concentration (mass transfer limitation) and oxygen-containing (competing reactions) challenges.

The invention belongs to the technical field of monatomic catalysts, and relates to a method for preparing a honeycomb-shaped sulfur-nitrogen co-doped carbon-loaded manganese monatomic catalyst by a one-pot method, which comprises the following steps: (S1) dissolving alkali metal salt in water to obtain a template solution; adding a manganese salt, a nitrogen-containing aromatic heterocyclic ligand and an amino acid thiol ligand into the template solution according to a molar ratio of 1: (15-25): (10-20), and carrying out a coordination reaction at 60-80 DEG C to obtain a mixed solution; (S2) carrying out freeze drying on the mixed solution to obtain precursor powder; (S3) carbonizing the precursor powder to obtain a carbonized material; and (S4) washing the carbonized material with water to remove the alkali metal salt template, and then sequentially carrying out acid pickling, water washing and drying. The honeycomb-shaped sulfur-nitrogen co-doped carbon-loaded manganese monatomic catalyst with excellent catalytic activity and stability is prepared through synergistic coordination of a nitrogen-containing aromatic heterocyclic ligand and an amino acid thiol ligand to manganese ions and combination with an alkali metal salt template and a freeze-drying process.

A cathode electrode of a Zinc Bromine Static Battery (ZBSB) apparatus. The cathode electrode comprises 80-90% by weight of a mixture of a quaternary ammonium salt fused with activated carbon to form a salt-fused activated carbon component. The cathode electrode further comprises 5-12% by weight of super P carbon. Furthermore, the cathode electrode comprises 1-5% by weight of a binder. The salt-fused activated carbon component, super P carbon, and the binder are mixed together to form the cathode electrode.

The invention belongs to the technical field of catalytic materials, and particularly relates to a bimetallic monatomic catalyst and a preparation method and application thereof. The preparation raw materials of the bimetallic monatomic catalyst comprise a metal salt, a ligand and a substrate material, wherein the metal salt comprises two of hard acid metal salt, boundary acid metal salt and soft acid metal salt, and the molecular structure of the ligand contains at least one hard alkali coordination group and at least one soft alkali coordination group. The preparation method of the bimetallic monatomic catalyst is green and environmentally friendly, efficient metal dispersion can be achieved, and the synergistic effect of bimetallic monatomic has the advantages of improvement of the reaction catalytic activity, low energy consumption of manufacturing and low cost. When the bimetallic monatomic catalyst is applied to the metal-air battery, the electrochemical performance of the obtained metal-air battery can be improved, and the bimetallic monatomic catalyst has a good application prospect.

The application belongs to the field of lithium air battery preparation, and particularly relates to a preparation method of a lithium air battery positive electrode with superhydrophobicity. The technical scheme of the application is as follows: a preparation method of a lithium air battery positive electrode with superhydrophobicity, wherein the material for preparing the positive electrode is a mixture of MSiO2, MWCNTs and MnO2; and the preparation of the positive electrode is implemented by means of roller pressing. The preparation method of the lithium air battery positive electrode with superhydrophobicity is safe, convenient and economical, and can significantly improve the performance of the battery.

The application provides a magnesium metal negative electrode structure and a preparation method and application thereof. The preparation method of the magnesium metal negative electrode structure comprises: coating a metal layer on at least one surface of a magnesium substrate by using a vacuum evaporation technology, and the material of the metal layer comprises one or a combination of multiple of Bi, Sn, Sb, Zn, Pb and In. The application forms a dense and uniform metal layer on the magnesium substrate by using the vacuum evaporation technology, so as to effectively isolate the direct contact between the electrolyte and the magnesium substrate, inhibit the occurrence of a side reaction and the formation of a passivation layer; the selected Bi, Sn, Sb, Zn, Pb and In metal materials have good magnesium affinity and good Mg 2+ ion conduction capacity, and the formed protective layer is also a low-impedance, high-stability ion conduction layer, which improves ion conduction efficiency, so that the electrochemical performance of a secondary magnesium battery based on the metal magnesium negative electrode structure is improved.

This invention belongs to the field of air batteries and relates to an anode material for air batteries. The anode material mainly consists of the following components by weight percentage: Mg: 0.1%-0.6%, Sn: 0.1%-0.8%, Ga: 0.01%-0.1%, In: 0.01%-0.1%, Bi: 0.01%-0.1%, with impurities not exceeding 0.01%, and the balance being Al. The anode material for air batteries of this invention successfully prepares aluminum anode material by composite addition of Mg, Sn, Ga, In, and Bi elements to activate the aluminum anode, followed by composition optimization, smelting, cold rolling deformation, and stress-relief annealing. This effectively improves the utilization rate of the aluminum anode while increasing its energy density; the production process is simple and meets the needs of mass production.

The invention belongs to the technical field of new energy, and particularly relates to a carbon-based transition metal monatomic catalyst and a preparation method and application thereof. According to the preparation method provided by the invention, synthesis of the bimetallic ZIF material is matched with plasma calcination, so that the dispersity and stability of single atoms can be remarkably improved, the catalytic performance is further improved, and the service life is prolonged. The obtained catalyst shows better oxygen reduction performance than commercial Pt / C in an alkaline medium; metal single atoms are stably anchored to a carbon matrix, so that the corrosion resistance is high, and the performance attenuation in long-period circulation is small; the carbon-based structure is porous and is doped with nitrogen, so that the mass transfer effect is enhanced, and the stability is excellent. The three bottleneck problems of high cost, low performance and short service life in the development of the current zinc air battery are solved, and key material support is provided for a new generation of high-performance and low-cost energy storage devices.

The invention provides an atomic-scale catalyst-carbon nanotube composite material as well as a preparation method and application thereof, and belongs to the technical field of electrochemical catalysis. The atomic-scale catalyst-carbon nanotube composite material prepared by the invention has a mutually cross-linked carbon nanotube three-dimensional conductive network, and the network contains a nitrogen-doped carbon matrix formed by in-situ pyrolysis of phenanthroline and wrapped on the outer wall of the carbon nanotube. An atomic-scale dispersed metal species M is stably anchored in a nitrogen-doped carbon matrix through an M-Nx coordination bond to form single / double atomic sites, so that a stable three-dimensional structure in which the carbon tube is used as a skeleton and the nitrogen-doped carbon is used as muscle is formed, and rich micropores and mesopores are formed. The prepared atomic-scale catalyst-carbon nanotube composite material has efficient catalytic activity and high conductivity, and shows excellent electrochemical performance when being used for electrochemical catalysis.

The invention relates to a rod-like cobalt manganese molybdate electrode catalyst and a preparation method and application thereof, and the preparation method comprises the following steps: (S1) dissolving a cobalt salt, a manganese salt and an organic ligand in water according to a molar ratio of 1: (0.9-1.1): (1-2), and carrying out a coordination reaction to obtain a solution A; the molar weights of the cobalt salt and the manganese salt are respectively calculated by Co and Mn; the organic ligand is 2-phosphono butane-1, 2, 4-tricarboxylic acid and / or amino trimethylene phosphonic acid; (S2) dissolving alkali metal molybdate in water to obtain a solution B; adding the solution B into the solution A for coprecipitation reaction to obtain precursor powder; and (S3) calcining the precursor powder in an oxygen-containing atmosphere to obtain the rod-like cobalt manganese molybdate electrode catalyst. Two metal elements of cobalt and manganese are introduced into a molybdate system at the same time, Co < 2 + > and Mn < 2 + > are pre-complexed through organic ligands, finally, the rod-like cobalt-manganese molybdate electrode catalyst with the uniformly distributed atomic scale is prepared, and the catalyst shows excellent ORR / OER bifunctional catalytic activity.

The invention belongs to the field of electro-catalysis, and particularly discloses application of a copper-cluster-based metal covalent organic framework material as a catalyst in a methanol-assisted zinc-air battery. The copper-cluster-based metal covalent organic framework material is utilized to solve the problem of slow proton transfer of two half reactions of discharging and charging in the current methanol-assisted zinc-air battery.

The invention belongs to the technical field of new energy batteries, and provides a metal gas battery box for in-situ Raman testing, which comprises a gas bin partition plate, and a gas replacement assembly is arranged between two opposite side walls of the gas bin partition plate; the interior of the battery bin partition plate is communicated with the interior of the gas bin partition plate, a positive electrode material and a metal electrode are placed in the battery bin partition plate, and the positive electrode material and the metal electrode form an electrode loop through an electrical connection assembly; the sealing assembly comprises a battery top plate arranged at the top of the gas bin partition plate and a battery bottom plate arranged at the bottom of the battery bin partition plate, a visible part is arranged on the gas bin partition plate and used for achieving visible spectrum in the battery bin partition plate, and a temperature adjusting mechanism is arranged in the battery bottom plate and used for adjusting the temperature in the battery bin partition plate. The battery box disclosed by the invention is compact in structure, is compatible with various atmospheres and temperature and pressure conditions, and can provide high-fidelity data streams with four-way synchronous interfaces of an electrochemical workstation, a temperature control system, a pressure regulation system and a Raman system.

The invention relates to the technical field of nano materials, and discloses a zinc monatomic catalyst and a preparation method and application thereof, zinc monatomic in the zinc monatomic catalyst is uniformly dispersed on ultrathin nitrogen carbon nanosheets; a preparation precursor of the zinc monatomic catalyst is two-dimensional layered Zn-ZIF; the zinc monatomic catalyst has a highly exposed ZnN2 active site; the zinc monatomic catalyst forms an ultrahigh specific surface area and a hierarchical pore structure through inorganic salt KI-assisted pyrolysis, and the zinc monatomic catalyst is formed by stacking ultrathin two-dimensional carbon nanosheet layers. According to the preparation method disclosed by the invention, the Zn-ZIF with a two-dimensional lamellar structure is synthesized by taking the nitrogen-rich 2-methylimidazole and the zinc acetate dihydrate as raw materials, and the structure can still be well reserved after high-temperature molten salt pyrolysis and liquid-phase ultrasonic stripping treatment; the zinc monatomic catalyst with a unique two-dimensional lamellar structure shows excellent catalytic activity and stability when applied to oxygen reduction reaction (ORR).

A bipolar current collector of a Zinc Bromine Static Battery (ZBSB) apparatus comprises a first electrically conductive layer comprising a polyethylene based polymer and an electrically conductive agent. The first electrically conductive layer is in contact with a cathode layer of the ZBSB apparatus. The bipolar current collector further comprises a second electrically conductive layer that is attached to the first electrically conductive layer. The second electrically conductive layer comprises the polyethylene based polymer and a graphite layer. The ZBSB apparatus is independent of a preinstalled anode electrode. The second electrically conductive layer is configured to dynamically operate as an anode layer of the ZBSB apparatus when in operation.

The invention relates to the technical field of aluminum air batteries, in particular to a rotating wheel water production type aluminum air battery and a control system.The rotating wheel water production type aluminum air battery comprises a galvanic pile box, an air supply assembly, a water production assembly and an electrolyte circulating assembly.According to the scheme, alkali liquor does not need to be stored in the galvanic pile box, and long-term storage of the galvanic pile box is facilitated; the air supply assembly supplies air into the electric pile box through the air inlet; the water production assembly is used for extracting moisture in air when the air supply assembly supplies the air into the galvanic pile box and conveying the extracted water into the galvanic pile box, and the water entering the galvanic pile box can be mixed with potassium hydroxide and catalyst powder to form electrolyte; the electrolyte circulating assembly can collect wastes generated by power generation in the electric pile box, so that the probability of influencing the power generation efficiency is reduced; the electrolyte is prepared by using moisture in air, so that the problem that the battery cannot be used in a water-free environment is avoided, and the problem that the application scene of the aluminum air battery is limited is solved.

In accordance with some embodiments of this disclosure, a metal-hydrogen battery according to embodiments of the present disclosure includes a vessel; a plurality of electrode stacks arranged in the vessel, wherein each electrode stacks of the plurality of electrode stacks includes a plurality of layers of electrodes, the layers of electrodes including alternating cathode electrodes and anode electrodes, the anode electrode being from of a transition metal anode with a catalyst, one or more separators separating the layers of electrodes, and an electrolyte that saturates each of the electrode stacks in the plurality of electrode stacks.

Methods and systems of changing ion concentrations in a water, involving extracting and providing ions from and to water masses or aliquots, where extracting and providing said ions may motivate partitioning of CO2 into the water.

The invention relates to the technical field of catalysts, and particularly discloses a Pd-coated PdPtCuNiCoZn octahedral nano high-entropy alloy as well as a preparation method and application of the Pd-coated PdPtCuNiCoZn octahedral nano high-entropy alloy. The Pd-coated PdPtCuNiCoZn octahedral nano high-entropy alloy provided by the invention is a core-shell octahedral nano crystal which takes Pd as a core and takes Pd, Pt, Cu, Ni, Co and Zn as a shell layer. According to the Pd-coated PdPtCuNiCoZn octahedral nano high-entropy alloy provided by the invention, the dosage of noble metals Pt and Pd is greatly reduced, and meanwhile, through the synergistic effect of various transition metals and noble metals, the preparation cost of a catalyst is reduced, and the adsorption / desorption process of OER and ORR reaction intermediates is optimized by effectively regulating and controlling an electronic structure, so that the performance of the catalyst is improved. And the catalytic activity and durability of the catalyst are obviously improved.

Asymmetric hybrid electrode (110) for a capacitor-assisted battery, comprising: a current collector (114) containing an electrically conductive material; a first electroactive portion (118) on a first surface (126) of the current collector (114), the first electroactive portion (118) comprising: a first battery layer (134) with a first electroactive battery material and a first binder; a second electroactive portion (122) on a second surface (130) of the current collector (114) facing away from the first surface (126), the second electroactive portion (122) comprising: a second battery layer (138) with a second electroactive battery material and a second binder; and a capacitive layer (142) comprising: a capacitive electroactive material and a third binder, whereby the first electroactive section (118) and the second electroactive section (122) are asymmetric, the first electroactive battery material and the second electroactive battery material are each positive electroactive materials or each negative electroactive materials, and the asymmetric hybrid electrode (110) has a capacitor hybridization ratio of 0.01 - 1%, wherein the second battery layer (138) is located between the capacitive layer (142) and the current collector (114), the first battery layer (134) is located directly on the first surface (126) of the current collector (114), the second battery layer (138) is located directly on the second surface (130) of the current collector (114), and the capacitive layer (142) is located directly on the second battery layer (138), and wherein the first battery layer (134) has a first thickness (154) of less than 5 mm, the second battery layer (138) has a second thickness (158) of less than 5 mm, and the capacitive layer (142) has a thickness (162) in a range of 1 - 200 µm.

The invention provides a bimetallic nitride catalyst and a preparation method and application thereof, and relates to the technical field of catalysts.The preparation method comprises the steps that ferric nitrate and soluble starch are added into water and stirred to be gelatinized, and gelatinized liquid is obtained; adding zinc nitrate, dicyandiamide and cobalt nitrate into the gelatinized liquid, and uniformly stirring to obtain hydrogel; the hydrogel is subjected to freeze drying, and aerogel is obtained; the aerogel is placed in an ammonia atmosphere, heat preservation is conducted for 2-6 h at the temperature of 850-950 DEG C, the bimetallic nitride catalyst containing the iron-cobalt nitride is obtained, and the bimetallic nitride catalyst is high in oxygen reduction reaction activity and cycling stability.