63 results about "Maximum power density" patented technology

The invention relates to the technical field of capacitor preparation, in particular to a preparation process optimization method and system applied to a high-frequency special capacitor, and the method comprises the steps: confirming a preparation environment, receiving a preparation instruction based on the preparation environment, and if the quality of a modified polypropylene film is not within a preset quality interval, determining that the modified polypropylene film is not in the preset quality interval; if yes, returning to the step of obtaining the modified polypropylene film according to the preparation instruction, and if the mass of the modified polypropylene film is within a preset mass interval, metallizing the modified polypropylene film by utilizing distillation equipment to obtain a metallized modified film; and completing the preparation process optimization method applied to the high-frequency special capacitor based on the sealed capacitor, the maximum power density report and the conductivity report. According to the invention, key parameters in the preparation process can be acquired and dynamically adjusted in real time, so that the accuracy of capacitor performance evaluation is improved.

The invention belongs to the technical field of microbial fuel cells, and particularly relates to a microbial fuel cell, a carbon-based anode and a preparation method of the carbon-based anode. Preparing a polyaniline / dopamine modifier from an aniline monomer and dopamine hydrochloride, and modifying the polyaniline / dopamine modifier on a carbon felt electrode to form a PANI-DA / CF anode; the preparation method comprises the following steps: preparing flower-like Fe2O3 nanoparticles by adopting a hydrothermal method, and electrochemically depositing the flower-like Fe2O3 nanoparticles on a PANI-DA / CF electrode to prepare a Fe2O3 / PANI-DA / CF anode; according to the microbial fuel cell disclosed by the invention, the maximum power density of the phenol wastewater anolyte reaches 4594 + / -97 mW / m < 2 > and is improved by 83.1% compared with that of a carbon felt anode MFC (Microbial Fuel Cell); after operation for 96 hours, the phenol degradation rate reaches 99.4%; and the electricity generation performance is still kept stable after three months of operation. The Fe2O3 / PANI-DA / CF anode provided by the invention improves the power density output of the microbial fuel cell and the wastewater treatment efficiency.

The invention discloses a nitrogen / boron-doped non-noble metal-based material, a synthesis method thereof and application of the nitrogen / boron-doped non-noble metal-based material in a microbial fuel cell. According to the method, a carbon fiber brush is used as a substrate, urea and sodium borohydride are used as a nitrogen source and a carbon source respectively, and the nitrogen / boron doped non-noble metal-based material is synthesized through a hydrothermal method. The electrostatic interaction between graphene oxide and FeCoNi-LDH is utilized to realize tight combination, so that FeCoNi-LDH nanosheets are uniformly dispersed on the surface of the carbon fiber brush, and the problems that LDHs are easy to agglomerate and poor in conductivity are solved; in the boron / nitrogen co-doping process, an efficient electron transmission channel is constructed by adjusting the electronic structure of the composite material, and the material is endowed with excellent electron transmission capability and oxygen reduction performance. In an MFC (Microbial Fuel Cell) test constructed by taking a nitrogen / boron-doped non-noble metal-based material as a cathode, the output voltage and the maximum power density are several times of those of commercial Pt / C and a blank carbon fiber brush, and the carbon fiber brush has a wide application prospect in the field of microbial fuel cells.

The invention relates to a design method and device of a vibration energy taking device, computer equipment and a storage medium. The method comprises the following steps: respectively determining influence ratios of a coil, a magnet and a spring on key performance parameters based on initial design parameters; wherein the key performance parameters comprise the characteristic frequency, the device volume and the output power of the vibration energy taking device; determining an optimal design sequence of the coil, the magnet and the spring based on the influence ratio; component parameters of the coil, the magnet and the spring are determined based on the optimization design sequence, so that the power density of the vibration energy taking device is the maximum power density, and the characteristic frequency of the vibration energy taking device is the target characteristic frequency. Through the design method of the invention, the vibration energy taking device with high power density can be obtained.

The invention relates to an iron single atom / zinc atom cluster-nitrogen-carbon composite material as well as a preparation method and application thereof. Zinc nitrate hexahydrate, ferric acetylacetonate and dimethylimidazole are used as raw materials, and the iron single atom / zinc atom cluster-nitrogen-carbon composite material FeSA / ZnAC-N-C is prepared through stirring and thermal shock at room temperature. The preparation method comprises the following steps: a, stirring at room temperature to prepare an iron-zinc bimetallic zeolite imidazole organic framework FeZn-ZIF precursor; and b, carrying out thermal shock on the precursor to prepare the FeSA / ZnAC-N-C. The FeSA / ZnAC-N-C shows excellent oxygen reduction reaction (ORR) catalytic performance, the half-wave potential is 0.90 V, the Tafel slope is 46.4 mV dec-1, and the performance exceeds that of commercial Pt / C. Besides, the zinc-air battery constructed by taking FeSA / ZnAC-N-C as the air cathode can reach the maximum power density of 161.5 mW cm <-2 > and the specific discharge capacity of 792.7 mAh g <-1 >, can stably circulate for 1500 circles, and shows good practical application value. The preparation method can be expanded to preparation of other monatomic / atomic cluster composite materials, and a new idea is provided for development of efficient electrocatalysts.

A method for directionally constructing a non-precious metal catalyst with a high proportion of alloyed diatomic pairs, which relates to a method for preparing a non-precious metal catalyst, is intended to solve the technical problems of low proportion of diatomic pairs and poor catalytic effect in existing diatomic catalysts. This method uses small cyanamide molecules and two transition metal ions to prepare a salt solution pre-anchored with dimetallic ions, then adsorbs the ZIF‑8 powder onto the salt solution, anneals it at high temperature under a protective atmosphere after drying, and obtains a non-precious metal catalyst loaded with a high proportion of alloyed diatomic pairs. The maximum power density of the hydrogen-oxygen proton exchange membrane fuel cell prepared using the catalyst is 1070mW cm in a H2 / O2 environment. ‑2 , the maximum power density in Air / H2 environment reaches 624mW cm ‑2 , which can be used in the field of hydrogen proton exchange membrane fuel cells.

This invention relates to a medium-temperature solid oxide fuel cell cathode material and its preparation method. The invention employs a sol-gel method to synthesize perovskite oxide Pr 0.1 Ba 0.9 Co 0.8 Zr 0.1 Y 0.1 O 3‑δ The material contains PrBaCo2O with a double perovskite structure. 5+δ BaCo with single perovskite structure 0.8 Zr 0.1 Y 0.1 O 3‑δ Two phases. Multiphase Pr 0.1 Ba 0.9 Co 0.8 Zr 0.1 Y 0.1 O 3‑δ The sample achieved a conductivity of 100 S / cm within the operating temperature range of a mid-temperature solid oxide fuel cell. ‑1 At 700℃, the polarization impedance is 0.06 Ωcm. 2 This meets the requirements for cathode materials in solid oxide fuel cells. The electrolyte-supported single cell achieved a maximum power density of 710 mW / cm³ at 800℃. ‑2 The single cell underwent continuous and stable discharge at a constant current for 200 hours without performance degradation, demonstrating excellent output performance stability. In summary, perovskite oxide Pr 0.1 Ba 0.9 Co 0.8 Zr 0.1 Y 0.1 O 3‑δ It is a potential cathode material for intermediate-temperature solid oxide fuel cells.

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.

The invention discloses a novel method for generating electricity by treating aged landfill leachate through a Co3O4 / Ni-MOF anode single-chamber MFC, and belongs to the technical field of inorganic environment materials and waste water resource utilization. The method comprises the following steps: firstly preparing different materials and taking the different materials as an anode catalyst of a microbial fuel cell (MFC), then constructing a single-chamber MFC, taking anaerobic activated sludge obtained by culturing aerobic activated sludge of a sewage treatment plant as anolyte, adding a nutrient solution, stabilizing for several periods, replacing an anaerobic sludge matrix in an anode chamber with the aged landfill leachate, and finally preparing the aged landfill leachate in the single-chamber MFC. The MFC is operated at room temperature and constant pressure, organic pollutants and ammonia nitrogen in the aged landfill leachate can be removed, and meanwhile electric energy can be recycled. The method is simple in equipment, convenient to operate, energy-saving and free of secondary pollution. When the anode catalyst is Co3O4 / Ni-MOF, the maximum power density of the single-chamber MFC reaches 882 mW / m < 2 >, the maximum output voltage is 524 mV, the COD removal rate can reach 35.3%, and the ammonia nitrogen removal rate can reach 48.5%.

The present invention provides a conductive hydrogel and its derivatives, carbon nanomaterials, and enzyme bioelectrodes and their applications. The designed and synthesized conductive hydrogel and its derivatives can serve as electrolytes for flexible / rechargeable enzyme biofuel cells, ensuring ion conduction between the enzyme bioanode and enzyme biocathode while also serving as a fuel tank. Furthermore, the use of the hydrogel simplifies and facilitates the assembly of the biofuel cell, allowing the enzyme bioanode and enzyme biocathode to be directly pressed onto the sides of the hydrogel electrolyte plate, thereby eliminating the cumbersome battery assembly and packaging issues. The present invention uses a catalyst to activate asphalt to produce RADC and enzyme bioelectrodes prepared using RADC. The biofuel cell / capacitor hybrid biodevice assembled based on the conductive hydrogel electrolyte and enzyme bioelectrode outputs up to 0.64V OCP and 1.01μW·cm ‑2 It has the maximum power density and has high stability, excellent self-healing, ductility, adhesion, puncture resistance and plasticity.

The present invention belongs to the technical field of fuel cells, and discloses a bionic peregrine falcon flow channel structure of a proton exchange membrane fuel cell, the upper surface of which is a periodic structure composed of a plurality of asymmetric waveform units with streamlined shapes of the abdomen of a bionic peregrine falcon, and the lower surface is horizontal. The three-dimensional structure flow channel of the present invention is applied to the bipolar plate of a proton exchange membrane fuel cell, which can not only force the reaction gas to impact the membrane electrode, making it easier to enter the interior of the battery, easier to diffuse evenly, forcing more oxygen to enter the catalyst layer, increasing the oxygen concentration of the battery catalyst layer, and increasing the maximum power density of the battery, but also can generate a horizontal fast airflow, which has a purging effect on the generated liquid water, and has excellent water removal ability, and can also use its drag-reducing streamlined structure to greatly reduce the pressure drop difference of the flow channel, reduce the parasitic power of the system, and improve the comprehensive performance of the fuel cell.

This application provides a sheet-like spinel cobalt ferrite, its preparation method, and its application, belonging to the field of solid oxide battery technology. In this application, a Co source and an Fe source are dissolved in deionized water, citric acid is added and stirred until homogeneous, then heated in a water bath until the solution becomes a reddish-brown transparent gel. The gel is then dried and ground to obtain a first powder. The first powder is then subjected to two CO2 laser-induced oxidation processes in air at a laser power of x to obtain a second powder. Wherein, 4W < x ≤ 10W. Finally, the second powder is washed and dried to obtain a sheet-like spinel cobalt ferrite. Compared with ordinary spinel cobalt ferrite, using the aforementioned sheet-like spinel cobalt ferrite as a cathode material in SOFC can reduce the polarization impedance of the battery by 0.023 Ωcm. 2 The maximum power density increased by 0.38 W / cm². ‑2 This improves the oxygen reduction activity and stability of SOFCs. Furthermore, using CO2 laser-induced methods simplifies the preparation process, reduces time costs, and increases production efficiency.

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 present application relates to a kind of boron ruthenium co-doped cobalt three oxide catalytic material and its preparation method and application, by hydrothermal, pyrolysis, etching three-step method preparation synthesis out with superfine nanoparticle B-Ru-Co3O4 Catalytic material, in alkaline total water splitting condition 10mA cm ‑2 Potential is 1.49V, simulate seawater total water splitting condition 10mA cm ‑2 Potential is 1.54V, using 3.5wt% NaCl as magnesium / seawater battery electrolyte, its maximum power density is 15mW cm ‑2 , and at 2mW cm ‑2 Power density under stable discharge 24h without attenuation.The synthesis method is simple and efficient, while realizing low noble metal loading rate, show higher than commercial noble metal catalyst performance, has broad application prospect.

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 application provides a method for removing uranium and organic matters in water body and generating electricity simultaneously, and particularly relates to the field of resourceful treatment of wastewater. The method comprises the following steps: placing an electrolyte solution containing a source of hexavalent uranium and organic matters in a photoelectrocatalytic reaction tank for light irradiation; the photoelectrocatalytic reaction tank uses tin sulfide nanosheet / carbon felt as a cathode, and uses titanium dioxide nanomaterial and a photovoltaic cell as a composite anode. The application utilizes the light anode to generate electron-hole pairs under light excitation, and the post-positioned photovoltaic cell generates a bias voltage under light excitation to drive the photo-generated electrons to transfer to the cathode and generate electricity, while improving the separation efficiency of the electrons and the holes. The soluble and easily migratory hexavalent uranium is quickly enriched by the tin sulfide nanosheet / carbon felt and is reduced to the non-migratory tetravalent uranium precipitate on the surface of the tin sulfide nanosheet / carbon felt by the photo-generated electrons and low-valence S. According to the test results, the highest removal rate of the method provided by the application to the organic matters and the uranium can reach more than 97%, and the maximum power density is 2.01 mW·cm ‑2 .

The invention provides flaky spinel cobalt ferrite as well as a preparation method and application thereof, and belongs to the technical field of solid oxide batteries. The preparation method comprises the following steps: dissolving a Co source and a Fe source in deionized water, adding citric acid, uniformly stirring, heating in a water bath until the solution becomes reddish brown transparent gel, drying, and grinding to obtain first powder; secondly, CO2 laser induction is conducted on the first powder twice in the air atmosphere with the laser power being x, and second powder is obtained; wherein x is more than 4W and less than or equal to 10W. And finally, washing and drying the second powder to obtain the spinel cobalt ferrite with the flaky morphology. Compared with common spinel cobalt ferrite, the flaky spinel cobalt ferrite is applied to the SOFC as a cathode material, so that the polarization impedance of the battery can be reduced by 0.023 ohm cm < 2 >, the maximum power density can be increased by 0.38 W cm <-2 >, and the oxygen reduction activity and stability of the SOFC can be improved. In addition, by adopting the CO2 laser induction method, the preparation process is simplified, the time cost is reduced, and the production efficiency is improved.

This invention discloses an SOFC fuel electrode, its preparation method, and its application, belonging to the field of fuel electrode technology. The SOFC fuel electrode of this invention has a three-layer structure, including a first layer, a second layer, and a third layer. By increasing the proportion of plate-like NiO in the second layer, the contact area between the electrode and the reacting gas can be increased, thereby improving the reaction rate. By increasing the proportion of particulate NiO in the first and third layers, the gas diffusion rate can be improved. The SOFC fuel electrode prepared using the method described in this invention exhibits good stability, durability, fuel utilization rate, and maximum power density.

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.

This invention provides a one-dimensional surface-shared oxide air electrode material, its preparation method, and its application, belonging to the technical field of air electrode materials. The novel one-dimensional surface-shared oxide air electrode material provided by this invention, which is non-stoichiometric, is A5B5O. 14 Type oxide, with the chemical formula Ba 5‑x Co 2.85 Fe 1.9 Ni 0.25 O 14‑δ Where 0 ≤ x ≤ 0.8. This invention modulates the oxygen vacancy concentration by changing the stoichiometric ratio of Ba at the A-site of the oxide, thereby improving its electrochemical performance in proton-conducting ceramic batteries. In Example 3 of this invention, Ba with x = 0.5... 4.5 Co 2.85 Fe 1.9 Ni 0.25 O 14‑δ When applied to proton-conducting ceramic batteries, it exhibits the highest measured electrochemical performance; at 700℃, in fuel cell mode, the measured polarization impedance is only 0.041 Ω·cm. 2 Its maximum power density reaches 2.101 W·cm³. ‑2 In electrolytic cell mode, after introducing humid air to the air electrode side, the current density reached 5.080 A·cm⁻¹ at an electrolytic voltage of 1.3V. ‑2 .

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 relates to the field of microbial fuel cells, in particular to a tungsten-based nano-particle material, a preparation method thereof and application of the tungsten-based nano-particle material in preparation of a microbial fuel cell anode. The preparation method comprises the following steps: taking Na2WO4. 2H2O and C2H2O4. H2O as raw materials, carrying out hydrothermal reaction in an acid environment in the presence of thiourea, and drying after the reaction to obtain the tungsten-based nanoparticle material. The tungsten-based nanoparticle material with the nanoflower or nanorod structure is obtained. The voltage of the MFCs with the tungsten-based nano-material modified carbon paper composite electrode as the anode reaches 0.556 V (R = 1000 omega), and the average maximum power density reaches 2.32 W.m <-2 >, so that a device assembled by using the tungsten-based nano-material modified carbon paper composite electrode as the anode has excellent power output, possibility is provided for commercial application of the MFC, and the application prospect is good.

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.

The invention discloses an Mg-N-C oxygen reduction reaction catalyst as well as preparation and application thereof, and belongs to the technical field of battery materials. Preparing a precursor solution from a high-molecular carbon-nitrogen polymer (PVP or PANI) and MgO, drying by distillation, grinding, primary annealing, pickling and secondary annealing, providing rich carbon and nitrogen sources for the high-molecular carbon-nitrogen polymer, taking MgO as a reaction type template, reducing MgO by part of C under the action of high temperature to form Mg steam, and forming pores in the carbon template to obtain the high-molecular carbon-nitrogen polymer / MgO composite material with the high-molecular carbon-nitrogen polymer and the high-molecular carbon-nitrogen polymer / MgO composite material with the high-molecular carbon-nitrogen polymer and the high-molecular carbon-nitrogen polymer / MgO composite material. The rest of C anchors free Mg < 2 + > on a carbon skeleton to realize doping of the magnesium element, and finally, the porous stacked Mg-N-C oxygen reduction reaction catalyst is synthesized, and the catalyst material shows excellent ORR performance under an alkaline condition; after the catalyst is assembled into a zinc-air battery, the open-circuit voltage and the maximum power density of the battery are far superior to those of commercial Pt / C, and the catalyst has a wide 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.