72results about How to "Increase the effective reaction area" patented technology

The invention discloses a secondary aluminium cell and a preparation method thereof. Foamed aluminium serves as a cathode. A carbon and sulfur composite material or sulfurized polyacrylonitrile serves as an anode active material. A halogen aluminate ionic liquid formed from halogen aluminium acid and any one of halogenated quaternary ammonium salt, quaternary alkylphosphonium salt or quaternary sulfosalt is obtained by preparing electrolyte. The cell has the advantages of high energy density, good cycle performance, safety, environmental protection, no pollution in the preparation process, low cost and simple process.

The invention discloses a rechargeable aluminum-sulfur battery and a preparation method thereof. The rechargeable aluminum-sulfur battery is prepared by adopting metallic aluminum or aluminum alloy, preferably foamed aluminum as cathode, polymeric organosulfides as anode active substances, and halogenated aluminic acid ionic liquid formed by halogenated aluminum with any one of quaternary ammonium salt, quaternary phosphor salt or quaternary sulfosalt as electrolyte. The rechargeable aluminum-sulfur battery has high energy density, good circulation performance, safety and environmental protection, no pollution in preparation process, low cost and simple technique, thus having good application prospect.

The invention provides a neutral plug removal treating agent and a preparation method thereof. The neutral plug removal treating agent comprises the following components in percent by mass: 5 to 12 percent of an antiscaling agent, 0.5 to 1 percent of a synergist, 0.5 to 2 percent of a dispersing agent, 0.5 to 2 percent of a regulator, 5 to 10 percent of a cosolvent, and the balance of water. The neutral plug removal treating agent has the advantages that acidic materials are not added or produced during the whole process, wax, colloid and asphaltene covering the surface of sediments can be removed under a neutral low-temperature condition, and the neutral plug removal treating agent is neutral, non irritant, low-corrosion, low in transportation risk, and mild in plug removal reaction, effectively removes indissolvable inorganic scales, such as sulfate and carbonate, and achieves the purposes of elimination of transportation operation risk, reducing of tubular column corrosion rate, protection of a reservoir framework structure and improvement of the success rate of measures.

The invention discloses a proton exchange membrane water electrolyser structure and an anode plate. The proton exchange membrane water electrolyser structure comprises the anode plate, an anode diffusion layer, a CCM membrane electrode, a cathode diffusion layer and a cathode plate. The anode plate comprises a fluid distribution area, an arc flow channel reaction area and a dotted flow field reaction area; and an anode plate fluid distribution area is an arc-shaped stepped flow field area which is gradually reduced from two sides to the circle center, an ellipse-like distribution structure is arranged in the middle of the area, the part, close to a water inlet, of the anode plate is an arc-shaped flow channel reaction area, and a flow field tail end area is a dot-shaped flow field reaction area. According to the invention, uniform diffusion of reaction water in each flow channel after entering a flow field is ensured by arranging the ellipse-like distribution structure in a fluid distribution area; the flow resistance of reaction water is reduced through an arc-shaped flow channel of the arc-shaped flow field, and the transmission efficiency of the reaction water is improved; and through the dot-matrix type structure of the dot-shaped flow field, formation of bubble plugs is reduced, the mass transfer capacity of reaction water is enhanced, and then the performance of the electrolytic cell is improved.

The invention belongs to the technical field of lithium primary battery positive electrode material preparation, and particularly relates to a chromium oxide/CNTS composite material and preparation and application thereof. The chromium oxide/CNTS composite material is prepared from chromium oxide and carbon nanotubes as raw materials through a high-temperature solid-phase method or a high-energy ball milling method. The CNTS with good conductivity is compounded with the chromium oxide, so that the conductivity of the obtained composite material is obviously improved, the capacity is increased, and the rate capability is improved.

The invention discloses a preparation method of lithium titanium silicate anode material for a lithium ion battery. The method specifically comprises the following steps: 1) dissolving a lithium salt, a titanium source and a silicon source into an organic solvent, and uniformly mixing the lithium salt, titanium source and silicon source to obtain a mixed solution; (2) adjusting the pH value of the mixed solution to 1.5-6.5; (3) introducing water vapor carried by a carrier gas into the mixed solution obtained in the step (2) to perform a hydrolysis reaction in order to obtain a co-precipitate, and performing filtering, water washing and drying to obtain a precursor; and (4) pre-burning the precursor in an inert protection atmosphere at the temperature of 450-700 DEG C for 3-5 hours, and sintering the pre-burned precursor at the temperature of 750-950 DEG C to obtain the lithium titanium silicate anode material for the lithium ion battery. The anode material prepared with the preparation method is ideal in shape and particle size distribution, and has high electrochemical performance. The preparation method is simple in flow, high in operability, high in safety, and convenient for realizing industrialization.

The invention belongs to the technical field of electrochemistry, particularly relates to a calcium vanadate composite material and a preparation method thereof, and further relates to application ofthe calcium vanadate composite material. The calcium vanadate composite material is a sheet-shaped composite material formed by a graphene material and CaV4O9; the mass ratio of the graphene materialto the CaV4O9 is 1:(35-40). According to the calcium vanadate composite material disclosed by the invention, the CaV4O9 and the graphene material are compounded together, so that the calcium vanadatecomposite material has relatively good conductivity and electrochemical performance. When the calcium vanadate composite material disclosed by the invention is used as a positive electrode active material of an aqueous zinc ion battery, the calcium vanadate composite material has excellent electrochemical performance, good cycling stability and excellent rate capability.

The invention discloses a crystal silicon dioxide/carbon porous composite material and a preparation method thereof. Three-dimensional network-shaped crystal silicon dioxide is evenly distributed on the surfaces of carbon particles, so that the crystal silicon dioxide/carbon porous composite material is formed. The silicon dioxide is tetragonal crystals and belongs to a P41212 space group, a=b=4.973, and c=6.924. The porosity of the crystal silicon dioxide/carbon porous composite material is 40%-80%, the peso-position hole diameter is 100-2000 nm, and the electrical resistivity is 0.10-80 ohmcm. The crystal silicon dioxide/carbon porous composite material comprises, by mass, 30%-90% of silicon dioxide and 10%-70% of carbon materials. The preparation method at least includes the following steps of mixing, forming and sintering. According to the step of mixing, the silicon dioxide particles, the carbon materials and a fluxing agent are evenly mixed, so that a powder-like mixture is obtained. According to the step of forming, the powder-like mixture is formed so that a porous block body can be obtained. According to the step of sintering, the obtained porous block body undergoes high-heat treatment in an inert atmosphere, and after the fluxing agent is removed, the three-dimensional network-shaped crystal silicon dioxide/carbon porous composite material is obtained.

The invention discloses a method for preparing aluminum/hydrogen peroxide monomer batteries, and the method is used for hermetically and fixedly assembling an anode part and a cathode part into an integral monomer battery, wherein the anode part and the cathode part are successively prepared; and the method is characterized in that granular spacers are fully adhered to one surface of the anode part at a certain interval, and the interval is used as an anode channel; and a through trough is pressed on one surface of a cathode substrate of the cathode part and used as a cathode channel. In the invention, an anode channel is formed by using granular spacers, thereby reducing the weight of the battery, reducing the pressure loss of an electrolyte flowing through the anode part, better facilitating the discharge of hydrogen and reaction products AlO2<->, and improving the specific energy and energy density of the battery; a cathode channel is pressed on the cathode part so as to form a catalyst layer-flow field plate two-in-one structure, thereby reducing the thickness and weight of the battery; an oxidizing agent can directly flow in the three-dimensional catalyst layer, and the mass transfer of hydrogen peroxides is smooth, thereby improving the specific energy of the battery; and an ion exchange membrane achieve an effect of transformation between a double chamber structure and a single chamber structure of the battery, and is suitable for energy type power battery packs of low speed underwater equipment.

The invention discloses a full-through-hole metal fiber sintered body fuel cell bipolar plate and a fuel cell stack, the full-through-hole metal fiber sintered body fuel cell bipolar plate comprises a conductive partition plate and a flow field plate, the flow field plate is arranged on one side or two sides of the conductive partition plate, and the flow field plate is made of a metal fiber sintered body; the flow field plate and the conductive partition plate are in integrated sintering connection, welding connection or cementing connection. According to the all-through-hole metal fiber sintered body fuel cell bipolar plate and the fuel cell stack provided by the invention, the metal fiber sintered body is adopted as the flow field plate, so that fluid diffusion is uniform, the effective reaction area of gas is doubled, and the power density of the cell is improved; the metal fiber felt serves as a cooling channel of the cell stack, so that the cooling efficiency is improved; the cell stack volume is reduced; and the cell stack volume power is improved.

A method for preparing a nano carbon electrode comprises the following steps: 1) forming a precursor gas; 2) weighing raw materials; 3) putting a precursor obtained in the step 2) in a 60-70 DEG C vacuum oven, drying for 10-30 hours, then putting into a tube type vacuum furnace with atmosphere protection, placing on a conductive substrate, then introducing nitrogen gas or argon gas, and next introducing the precursor gas; 4) preparing a dispersion powder from the product obtained in the step 3), carrying out isopyknic immersion of the dispersion powder with a phenolic resin-P123 macromolecule copolymer-ethyl orthosilicate sol, and carrying out full condensation; 5) depositing the product obtained in the step 4 on a thin metal layer; and 6) depositing an electrolyte on the thin metal layer. The method can reduce the cost, and also improves the performance.

The invention aims at providing a novel battery structure. Laminated winding of anodes, electrolytes, partition membranes and cathodes is usually adopted in preparation of current ion batteries, and this mode has an obvious defect that the utilization rate of anode materials is not high, and correspondingly the density of battery energy is not high enough, so that the demand of electric cars cannot be met. It can be shown by a principle of a battery that by increasing the effective reaction area of electrodes and reducing internal resistance of the battery, the battery performance index can beeffectively upgraded. The utilization rate of the electrodes is increased, the internal resistance of the battery is lowered, and compared with a battery structure of a traditional mode, the batterystructure remarkably improves the performance of the battery.