13results about "Hybrid cells" patented technology

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 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 present application relates to the technical field of electrode, especially to a kind of triatomic catalyst integrated electrode and its preparation method and application.The pyrazole precursor monomer and metal salt are dissolved in solvent respectively in the present application;Then two solutions are sprayed on carbon cloth or carbon paper in turn evenly, and solidified at room temperature;Pyrazole precursor monomer is 2,4,6-tris (4- (1H-pyrazol-4-yl) phenyl) -1,3,5-triazine and / or 1,3,5-tris (1H-pyrazol-4-yl) phenyl;Metal is one or more of Co, Fe, Mn and Ni.The present application utilizes the high reactivity of pyrazole monomer, and generates triatomic catalyst under the traction of metal ion at room temperature, and is in-situ synthesized and grown on the surface of conductive substrate at room temperature, without high-temperature heat treatment, avoids using binder, improves electron conduction rate and structural stability, has good catalytic performance, and has excellent electrochemical performance when assembled into zinc-air battery.

This application discloses a lithium battery and a method for restoring its capacity. The method includes the following steps: placing the lithium battery at room temperature for multiple rounds of constant current charge-discharge cycles, stopping the cycles when the battery's state of charge (SOC) reaches 0%; and subjecting the lithium battery to heat treatment after each round of constant current charge-discharge cycles, wherein the heat treatment time is 0.5 h to 5 h, and the heat treatment temperature is 35 °C to 65 °C. This application effectively improves the cycle stability and cycle life of the lithium battery by heating the lithium battery after a certain number of cycles and controlling the heating temperature and time within a certain range.

This invention discloses an oxygen reduction reaction catalyst, its preparation, and its application. The catalyst comprises a layered structure formed by an array of hollow carbon nanocages loaded with p-doped metal single atoms. The preparation method involves: dissolving a zinc salt and a second metal salt in water to obtain a metal source solution; mixing the metal source solution with an aqueous solution of 2-methylimidazole to obtain metal-organic framework nanoparticles; dispersing the metal-organic framework nanoparticles and a phosphorus-containing etchant capable of thermally decomposing to generate ammonia in water to form a mixed colloidal solution; freeze-drying the mixed colloidal solution to obtain a layered precursor; and calcining the layered precursor to obtain the oxygen reduction reaction catalyst. This catalyst can be applied to electrochemical oxygen reduction testing and the preparation of proton exchange membrane fuel cells and zinc-air batteries. The catalyst prepared by this invention exhibits good mass transfer performance and a high specific surface area, significantly improving the accessibility of active sites and possessing excellent electrocatalytic performance.

A system including a plurality of electrochemical cells and a charge voltage decay control system for the system is disclosed.

The application relates to a bimetallic phosphide / nitrogen-carbon electrocatalyst based on active site protection and three-dimensional mass transfer channel design and a preparation method thereof. The preparation process of the catalyst comprises the following steps: firstly, mixing 2-methyl imidazole aqueous solution and cobalt and zinc-containing nitrate aqueous solution, stirring, washing and drying to obtain a Co-ZIF-8 precursor. Then, the precursor is secondarily modified by using phytic acid as a phosphorus source and iron ions. Finally, the CoFeP-NC electrocatalyst is prepared through a high-temperature chemical vapor deposition reaction under the assistance of dicyandiamide. The preparation process has the advantages of environmental protection, convenience and low cost. The obtained CoFeP-NC catalyst exhibits excellent bifunctional electrocatalytic activity (oxygen reduction and oxygen evolution reaction) and stability, and the potential difference (△E) between the oxygen evolution and oxygen reduction reactions is as low as 0.70 V. The zinc-air battery assembled based on the catalyst shows high peak power density and excellent cycle stability.

The application relates to the field of self-powered electrochemical biosensing technology, and particularly discloses a zinc-air fuel cell self-powered hydrogel sensor for detecting pathogenic bacteria, a sensing device, a preparation method and application thereof. The sensor takes a zinc-air fuel cell as a self-powered module, combines DNA molecular recognition technology and nucleic acid amplification reaction, realizes targeted release of an oxygen reduction catalyst, obtains an electric current signal required for electrochemical detection, and constructs a regression model based on the above-mentioned sensor and a machine learning algorithm module, taking electrochemical signals as input and the concentration logarithm of a pathogenic target gene fragment as output, so that intelligent analysis and accurate quantification of signals are realized. The application combines DNA molecular recognition, nucleic acid amplification reaction and a machine learning intelligent model, realizes integrated detection of 'biological recognition-signal conversion-intelligent analysis', and simultaneously provides application of the application in detection of the brown rot, and has potential field application value.

This invention relates to a Pr-doped transition metal-based atomic-level catalyst, its preparation method, and its application. It aims to address the technical problems of insufficient activity and stability in existing transition metal-based single-atom catalysts. The Pr-doped transition metal-based atomic-level catalyst of this invention consists of Pr and M atoms forming atomic pairs embedded in a carbon support. M is coordinated with 4 N atoms, and Pr is coordinated with 6 O atoms. N and O atoms are connected through C atoms, and Pr atoms have 3 OH groups along their axial direction. Preparation method: Using ZIF-8 as a support, a Pr-ZIF-8 precursor is prepared by chemical doping, and a Pr-N co-doped porous carbon material is obtained through high-temperature heat treatment. M salt is introduced using ultrasonic adsorption, and an MPr-NC diatomic catalyst is obtained through high-temperature heat treatment. The peak power density in the fuel cell exceeds 1 W / cm³. 2 It can be used in the battery field.

This invention discloses a zinc-air battery cathode material and an integrated flexible zinc-air battery, belonging to the field of energy storage technology. The invention first carbonizes bamboo pulp fiber cloth to obtain modified bamboo charcoal fiber, providing a stable and high-performance substrate for subsequent loading of active materials. Then, a mixture of manganese acetate tetrahydrate, sodium diacetate, nickel acetate tetrahydrate, cobalt acetate tetrahydrate, and water is prepared and electrochemically deposited in a three-electrode system to deposit nickel-cobalt co-doped manganese dioxide onto the modified bamboo charcoal fiber, forming an integrated flexible cathode. The doping of nickel and cobalt can improve the electronic structure and stabilize the crystal structure of manganese oxide, inhibit the dissolution of manganese during charging and discharging, accelerate electron transfer during battery charging and discharging, and improve the overall efficiency of the battery. Furthermore, electrochemical deposition in a three-electrode system allows for the composite deposition with modified bamboo charcoal fiber, enhancing electrode performance.

The present application relates to a kind of irradiation modified proton conductor solid oxide fuel cell air electrode and its preparation method and proton conductor solid oxide fuel cell, including providing air electrode powder;The air electrode powder is prepared into air electrode slurry, slurry is coated on the electrolyte surface of half cell and is dried;After coating slurry, half cell is sintered, and full cell equipped with air electrode is obtained;The full cell is placed in electron accelerator irradiation area, and air electrode is irradiated and modified, and the irradiation dose is 1000KGy~5000KGy, and the air electrode of irradiation modification is obtained.The present application is simple, and parameter is controllable, realizes the significant improvement of catalytic activity under the premise of not changing electrode material basic structure, and the air electrode prepared has high catalytic activity and good structural stability, and when it is applied to proton conductor solid oxide fuel cell, the power generation, electrolysis comprehensive performance of cell under low temperature working condition can be effectively improved.