19 results about "Maximum power density" patented technology

The utility model provides a kind of high-power thick film heating device for new energy vehicle, including thick film heating plate, the upper surface of thick film heating plate is equipped with ceramic dielectric surface layer, the lower surface of thick film heating plate is equipped with metal base plate face, the upper of thick film heating plate is equipped with upper flow channel cavity mechanism, and lower is equipped with lower flow channel cavity mechanism;The utility model is by using single-layer thick film heating plate, and cooperate upper flow channel cavity mechanism and lower flow channel cavity mechanism to carry out up and down parallel flow guiding to heat conducting medium, so as to utilize heat conducting medium to synchronously absorb the heat of the upper and lower two sides of thick film heating plate, so as to reach double-sided heat exchange effect, to improve thick film heating device heat exchange coefficient and heat exchange area, to break through the maximum power density limit that thick film heating plate can use on traditional design, make thick film heating device realize higher electric power output under the same area, and simultaneously due to the improvement of heat exchange capacity, the thermal conversion efficiency of its product is also improved.

This invention belongs to the field of catalyst technology, specifically relating to a polyoxometalate-anchored cobalt single-atom catalyst, its preparation method, and its application. The invention uses a polyoxometalate as the anchoring substrate and electronic control unit. First, a cobalt-substituted polyoxometalate precursor is prepared via a coordination reaction, then composited with a ZIF-derived conductive carbon substrate, and finally reduced with hydrogen to obtain the target catalyst. This catalyst effectively inhibits cobalt single-atom aggregation, achieving a cobalt single-atom loading of 3.55 wt%. Under alkaline conditions, it exhibits excellent oxygen reduction catalytic activity, stability, and methanol resistance, with a half-wave potential of 0.826 V. When used in a zinc-air battery, it achieves an open-circuit voltage of 1.48 V and a flow rate of 239.6 mW / cm². 2 With maximum power density and excellent cycle stability, it can replace commercial platinum-carbon catalysts.

The application discloses a carbon dioxide capturing method, a capturing system and application thereof. The method comprises the following steps: mixing potassium carbonate solution and carbon dioxide gas to obtain a suspension, filtering the suspension to obtain a filtrate; after the battery device is powered on, the filtrate is introduced into a cathode area of the battery device, and carbon dioxide gas is introduced into the cathode area; after the solution in the cathode area is heated and the carbon dioxide is separated, the solution is introduced into an anode area of the battery device. The carbon dioxide capturing method provided by the application can generate electric energy while capturing carbon dioxide by using a battery device, carbon dioxide gas is introduced into the cathode area of the battery device to capture the carbon dioxide, after power on, K2CO3 is used as a reaction raw material of the anode area, the output power of the battery and the conversion rate of CO2 are high, the maximum power density can reach 50 W / m 2 , and the CO2 conversion rate can reach more than 24%.

The invention provides a cathode material and a preparation method and application thereof. The cathode material disclosed by the invention comprises the perovskite type ferrite core and the CeO2 nanoparticles covering at least part of the surface of the core, so that the cathode material has relatively high oxygen reduction catalytic activity; the Ca element is used for replacing the Sr element, the defect that the Sr element is prone to segregation in the high-temperature and long-term operation process can be overcome, the problem that the Sr element reacts with electrolyte to generate a high-resistance third phase is thoroughly solved, and the tolerance of the cathode material to CO2 in feed gas is further enhanced. The chemical formula of the cathode material is LaaCa (0.4-x) CexCobFecO (3-delta), element selection of the cathode material is limited, and the proportion of each element is limited in a specific range, so that the cathode material has relatively high oxygen reduction catalytic activity and long-term running structural stability, the electrochemical performance of the battery is enhanced, the overall impedance of the battery can be reduced, and the service life of the battery is prolonged. And the maximum power density of the battery is improved.

The invention discloses a Fe-N-C-at-MXene composite material, a synthesis method thereof and an application of the Fe-N-C-at-MXene composite material in a microbial fuel cell. According to the method, an in-situ growth strategy is adopted, MIL-101 (Fe) is constructed on the surface of single-layer Ti < 3 > C < 2 > T < x > MXene, an MIL-101 (Fe)-MXene composite material with good interface bonding is formed, melamine is introduced as a nitrogen source, synergistic nitrogen doping and carbonization are achieved through high-temperature pyrolysis, and the Fe-N-C-MXene composite material with the high specific surface area and rich active sites is constructed. The Fe-N-C-at-MXene composite material disclosed by the invention not only has excellent conductivity and structural stability, but also has a hierarchical pore channel and a high-density electrocatalytic active center, so that oxygen diffusion and interface reaction kinetics are effectively promoted. In an MFC performance test, as a cathode catalyst, the cathode catalyst remarkably improves the output voltage and the maximum power density of the battery, exceeds a commercial Pt / C catalyst, and shows a wide application prospect.

The invention relates to a preparation method and application of an iron / antimony diatom-nitrogen-carbon (Fe / Sb-N-C) composite material. The composite electrode is prepared according to the following steps: a, stirring at room temperature to synthesize a zeolite imidazole organic framework precursor (ZIF-8); b, preparing nitrogen-doped carbon through an annealing method; c, preparing a Fe / Sb-N-C precursor through solution dipping; and d, the Fe / Sb-N-C composite material is prepared through an annealing method. Fe / Sb-N-C shows excellent oxygen reduction reaction (ORR) catalytic performance, the half-wave potential is 0.92 V, the Tafel slope is 46.3 mV dec-1, and the performance is superior to that of commercial Pt / C. Besides, the zinc-air battery constructed by taking Fe / Sb-N-C as the air cathode can reach the maximum power density of 196mW cm <-2 > and the specific discharge capacity of 795mAh g <-1 >, can stably circulate for 1000 circles, and shows good practical application value. The preparation method can also be expanded to design of other diatomic composite materials, and a new idea is provided for development of efficient electrocatalysts.

The invention discloses a phosphorylated polyborosiloxane proton exchange membrane and application thereof, and belongs to the field of proton exchange membranes. The preparation method comprises the following steps: firstly preparing phosphorylated polyborosiloxane, grafting a phosphonic acid group to a polysiloxane main chain to ensure the stability of a proton carrier, and then blending with chitosan to form a hydrogen bond with phosphonic acid in the phosphorylated polyborosiloxane and unreacted free phosphoric acid. Compared with a method of doping or utilizing a metal organic framework for stabilization, the method provided by the invention fundamentally solves the problem that phosphoric acid is easy to lose by utilizing chemical bonds to graft phosphoric acid from the structure. Experimental results show that the phosphorylated polyborosiloxane proton exchange membrane provided by the invention has excellent thermal stability, the mass loss at 200 DEG C is lower than 10%, the high-temperature proton conductivity can reach 40-100 mS / cm, a single cell test shows that the open-circuit voltage is 0.2-1.0 V, the maximum power density reaches 200-800 mW / cm, and the phosphorylated polyborosiloxane proton exchange membrane shows good high-temperature low-humidity application performance.

The invention discloses a novel bacterium with an electrogenesis function and application thereof, and belongs to the technical field of microbial technology and biological energy. According to the invention, a novel strain with stable electricity generation capability is screened from papermaking wastewater in the final discharge phase of a microbial fuel cell (MFC). The homology between the 16s rRNA gene sequence of the bacterial strain and the known bacterial strain of Cupriavidus pauculus is the highest. The Cupriavidus pauculus PMWA1-3 strain is determined to be a new strain of Cupriavidus in combination with a phylogenetic tree construction result, and the new strain is named as Cupriavidus pauculus PMWA1-3. The bacterial strain can grow by taking a phenol organic pollutant catechol as a unique carbon source, and when the bacterial strain is used for constructing an MFC (Microbial Fuel Cell), the highest power generation voltage is 291.7 mV, and the maximum power density reaches 202.2 mW / m, which indicates that the bacterial strain has strong power generation capability.

The application discloses a novel bacterium with electricity generation function and application thereof, and belongs to the technical field of microorganisms and bioenergy. A novel bacterium with stable electricity generation capacity is screened in papermaking wastewater at the end of discharging of a microbial fuel cell (MFC). Cupriavidus pauculus The 16s rRNA gene sequence of the bacterium is most homologous to known strains. Combining with the construction result of a phylogenetic tree, it is determined that the bacterium is a novel strain of the genus Cupriavidus, and is named PMWA1-3. Cupriavidus pauculus The bacterium can grow by taking phenolic organic pollutants, namely catechol, as the only carbon source, a MFC is constructed by using the bacterium, the highest electricity generation voltage is 291.7 mV, and the maximum power density reaches 202.2 mW / m2, which indicates that the bacterium has strong electricity generation capacity.

The application is suitable for the technical field of parameter optimization, and provides an optimization method for maximizing power density of a proton exchange membrane fuel cell, comprising the following steps: optimization variable and optimization target selection; adopting an AdaBoost integrated neural network model as a proxy model for calculating fitness function values in an iteration process of a swarm intelligence optimization algorithm; selecting an improved grey wolf optimizer (IGWO) as an optimization tool for iteration optimization in a value range of the optimization variable, with the maximum power density as the target, to obtain an optimal optimization variable combination; and optimization result verification.The application proposes an optimization method for the power density of the proton exchange membrane fuel cell by coupling machine learning and a swarm intelligence algorithm, has a fast convergence speed, can obtain an optimal solution or an approximate optimal solution under a small number of iteration times, effectively reduces the number of target function calls, significantly reduces the calculation time and the calculation cost, and has a strong global search capability and can avoid falling into a local optimum.

The invention discloses heat-resistant glucose dehydrogenase and application thereof in an enzyme fuel cell, and belongs to the crossing field of bioelectrochemistry and new energy technologies. According to the invention, firstly, a heat-resistant glucose dehydrogenase TeGDH is screened, and the heat-resistant glucose dehydrogenase TeGDH is subjected to heterologous expression in escherichia coli BL21 (DE3) and shows good heat stability and catalytic activity; teGDH is dissolved in an anolyte containing an electron mediator anthraquinone-2, 6-disulfonic acid disodium salt, and the heat-resistant high-energy enzyme fuel cell is prepared by adopting a non-immobilized system; the maximum power density of the battery at 50 DEG C reaches 1.74 mW / cm, and the battery has good thermal stability and long-term operation performance; the invention combines big data mining, enzyme engineering and electrochemical technologies, provides a novel enzyme fuel cell solution with high activity, high stability and low cost, and has a good application prospect.

A cathode material, and a preparation method therefor and the use thereof. The cathode material comprises a perovskite-type ferrite core and CeO2 nanoparticles covering at least part of the surface of the core, which can make the cathode material have high catalytic activity for oxygen reduction. By replacing Sr with Ca, the drawback of Sr being prone to segregation during high-temperature and long-term operation can be overcome, the problem of Sr reacting with an electrolyte to form a high-resistance third phase can be completely solved, and the tolerance of the cathode material to CO2 in a feed gas can be favorably enhanced. The chemical formula of the cathode material is LaaCa0.4-xCexCobFecO3-δ. By limiting the options for the elements in the cathode material and limiting the proportion of each element to be within a specific range, the cathode material is made to have high catalytic activity for oxygen reduction and structural stability for long-term operation, which thus enhances the electrochemical performance of a battery, and can reduce the overall impedance of the battery and increase the maximum power density of the battery.

The invention discloses a preparation method of a cellulose-based ion separation membrane as well as a product and application of the cellulose-based ion separation membrane, and belongs to the technical fields of membrane materials, ion transmission and green energy. The ion separation membrane is composed of an anionic cellulose layer and a cationic cellulose layer, by means of dissolution and regeneration, anionic cellulose and cationic cellulose are dissolved in a cellulose solvent respectively to prepare solutions, then composite cellulose gel is formed through blade coating and coating, and finally the ion separation membrane is prepared through soaking and drying treatment. By adjusting the thickness ratio of the anion and cation cellulose layer, the membrane is endowed with a typical charge heterostructure, and rapid selective transmission of ions and excellent ion rectification characteristics are realized; meanwhile, the composite membrane is of an integrated structure, interlayer bonding is firm, and stability is excellent; the membrane can efficiently convert salinity gradient energy into electric energy, the maximum power density can reach 13.81 W / m < 2 >, the stability exceeds 30 days, and a new way is provided for developing efficient, green and renewable salinity gradient power generation membrane materials.

The application discloses a thermoelectric interface material and a preparation method thereof, and a thermoelectric device. a Ag b X c , X is a transition metal, a, b, c are atomic ratios, a = 0-2.5; b = 0-1.5; c = 0-1.5, and a, b, c are not zero at the same time. The thermoelectric device comprises the thermoelectric interface material. The thermoelectric interface material has a contact interface with high bonding strength and low contact resistivity of MgAgSb TEcM, and has excellent welding and thermal shock resistance in the phase transition temperature range. The thermoelectric device shows a maximum power density of 0.8 W cm ‑2 and a maximum conversion efficiency of 9.1% at a temperature difference of 325 DEG C, which is a breakthrough value of the full Mg-based Te-free thermoelectric device in the low temperature range. The application provides an ecological, high-performance and low-cost alternative solution to replace the traditional Bi2Te3-based thermoelectric device for low-grade waste heat recovery.

The invention discloses a novel carbon-encapsulated iron particle confinement catalytic biological battery cathode and a preparation method thereof.The preparation method comprises the steps that firstly, an ethanol dispersion solution of ZIF-8 and a K3 [Fe (CN) 6] solution are stirred, a ligand exchange reaction is conducted, a ZIF-8 (at) ZnFePBA precursor is generated after centrifugal washing and drying are conducted, then the ZIF-8 (at) ZnFePBA precursor is calcined in the inert atmosphere, and a novel carbon-encapsulated iron particle cathode catalyst (Fe / FinCx (at) NC) is obtained. Fe / FinCx (at) NC is doped into activated carbon, the activated carbon, PTFE emulsion and a proper amount of absolute ethyl alcohol are mixed and stirred according to the doping rate, slurry obtained through ultrasonic treatment serves as a catalyst layer, and then the catalyst layer and a stainless steel mesh current collection layer with the back face coated with conductive carbon black are co-pressed to obtain the air cathode. According to the carbon-encapsulated iron particle confinement catalyst disclosed by the invention, the output power of the activated carbon air cathode biological battery is remarkably improved by 134.5%, the output maximum power density is 2251 + / -43mW.m <-2 >, and the commercial application prospect of the activated carbon air cathode biological battery is very wide.

The invention discloses a preparation method of a lignin-based non-noble metal catalyst for a flow battery. The lignin-based non-noble metal catalyst is prepared by adopting nitrogen-doped reduced graphene oxide, sulfur / nitrogen-doped lignin, iron phthalocyanine and nitrate hexahydrate as raw materials, and the catalyst shows excellent oxygen reduction (ORR) and oxygen evolution (OER) bifunctional catalytic activity. When the lignin-based non-noble metal catalyst is applied to a lignin flow battery, the lignin-based non-noble metal catalyst shows good power generation performance, the open-circuit voltage is about 1.3 V, and the maximum power density can reach 162mW / cm < 2 >. In addition, the preparation process is simple, the production cost is low, on one hand, platinum carbon and other noble metal catalysts are expected to be replaced, and on the other hand, high-added-value utilization of industrial lignin is achieved. The industrial lignin is applied to the oxygen reduction and oxygen evolution reaction catalyst, and the industrial lignin is converted into electric energy and other chemicals.

The invention discloses a sulfonated polyaryletherketone proton exchange membrane and a preparation method thereof, and belongs to the technical field of fuel cells, and the method comprises the following steps: synthesizing a BDHPM monomer, carrying out polycondensation, bromination, phosphonic acid grafting and sulfonation to obtain PhSPAEK-x, carrying out composite membrane casting with 2-methylimidazole, annealing, and carrying out sulfuric acid protonation and strong phosphoric acid doping to prepare a PA / MeIm-PhSPAEK-x membrane. According to the membrane, PhSPAEK-x is used as a matrix, imidazole and phosphoric acid are compounded, a phosphoric acid pool is formed inside, the maximum power density is larger than or equal to 118 mWcm <-2 > under 130 DEG C / 20% RH, the maximum power density is larger than or equal to 487 mWcm <-2 > under 80 DEG C / complete humidification, the phosphoric acid retention rate is larger than or equal to 50%, and the thermal decomposition temperature is gt; the temperature is 400 DEG C; the membrane is simple in preparation process, low in cost and free of fluorine pollution, can replace a Nafion membrane and is suitable for proton exchange membrane fuel cells.

The application provides a proton exchange membrane fuel cell power density and operation parameter optimization method, taking the working temperature of a stack, anode pressure, cathode / anode relative humidity and current density as inputs, and power density as output, constructing a proton exchange membrane fuel cell agent model based on a random forest algorithm, and combining an improved spectrum algorithm to optimize the inputs and outputs of the agent model, so that the maximum power density and the corresponding operation parameters can be predicted. When the load demand changes, the fitness function of the improved spectrum algorithm can be changed, the power density corresponding to the load demand is calculated, and the corresponding operation parameters are predicted. The method shortens the optimization time, reduces the calculation burden in the optimization process, and improves the optimization efficiency.

The invention discloses a collaborative regulation and control optimization method for a multi-nano-channel ion permeation energy conversion device. The method comprises the following steps: determining structural parameters of the ion permeation energy conversion device; constructing a geometric model comprising a high-concentration liquid storage tank, a low-concentration liquid storage tank and a plurality of nano-channels connected between the high-concentration liquid storage tank and the low-concentration liquid storage tank in parallel; calculating the surface charge density sigma of the inner surface and the outer surface of the nano-channel; calculating the conductance Gtotal and the diffusion potential Ediff of the ion permeation energy conversion device; calculating the power density Pd of the device under different numbers of the nano channels to obtain a curve of the power density Pd changing along with the number N of the nano channels; determining the corresponding NlsrMP when the power density Pd reaches the maximum value; in a parameter area corresponding to the NlsrMP value, a curve that the power density changes along with the number N of the Pd nano channels is obtained, and the maximum power density Pd and MP of the ion permeation energy conversion device and the corresponding optimal structure parameters are determined according to the curve.