84results about How to "Increased electron transport capacity" patented technology

The invention discloses a nitrogen-sulfur double-doped mesoporous carbon electrode material as well as a preparation method and application thereof. A precursor of the electrode material comprises the following components in percentage by mass: 20%-85% of a template agent, 10%-75% of a nitrogen-containing compound and 5%-50% of a transition metal salt. The preparation method comprises the following steps: dissolving the template agent, the nitrogen-containing compound and the transition metal salt in a solvent, so as to obtain the precursor; carrying out calcination reduction on the precursor to obtain a primary carbonized material; carrying out acid pickling on the primary carbonized material to obtain a nitrogen-containing mesoporous carbon material; carrying out acid pickling and calcination reduction again, so as to obtain the nitrogen-sulfur double-doped mesoporous carbon electrode material. The application of the nitrogen-sulfur double-doped mesoporous carbon electrode material in a supercapacitor comprises the following steps: transferring a mixed solution of the electrode material, acetylene black, a binder and a dispersant to a glassy carbon electrode; carrying out three-electrode system testing in electrolyte solutions of different concentrations by virtue of an electrochemical workstation. The nitrogen-sulfur double-doped mesoporous carbon electrode material is of a hierarchical pore structure, has a high specific surface area and is an excellent supercapacitor material.

The invention belongs to the field of preparation of lithium-ion battery materials and particularly relates to high-cycle nickel-cobalt-manganese ternary material and a preparation method thereof; the high-cycle nickel-cobalt-manganese ternary material is mainly characterized in that the cycle performance of the material is improved by coating nickel-cobalt-manganese ternary material with a layer of nitrogen-phosphorus-containing compound to improve the compatibility of the material with electrolyte. The preparation method comprises: adding a nitrogen-phosphorus-containing polymer and a binder to 1-methyl-2-pyrrolidinone, stirring well, adding ternary material, stirring well, carbonizing, and soaking in ethylene carbonate solution to obtain the nickel-cobalt-manganese ternary material with nitrogen-phosphorus coating. The material prepared herein has surface charge distribution that is improved by means of nitrogen doping in the nitrogen-phosphorus compound, electron transfer performance is improved, quasi-Faraday effect is achieved, and capacity is given to better play; in addition, lattice structural stability of the material and the compatibility of the material with electrolyte are improved by the aid of phosphorus doping; the ethylene carbonate adsorbed by the material can provide improved compatibility of the material with electrolyte, the synergy of the doped nitrogen-phosphorus and the ethylene carbonate can be given to play, and the cycle performance of the material is improved.

The invention relates to a method for preparing a hydrogen sulfide gas sensor, in particular to a gas sensor constructed based on a novel two-dimensional nanocomposite material, which can be used to detect the hydrogen sulfide gas content in the environment. It belongs to the technical field of new nanometer functional materials and environmental monitoring. The present invention firstly prepares a kind of cerium and manganese bimetallic co-doped titanium dioxide nanosheet in-situ composite carbon nitride two-dimensional nanocomposite material CeMn-TiO2 / g-C3N4, utilizes the material's large specific surface area, mesoporous high gas Adsorption characteristics and electron transfer are sensitive to many characteristics affected by gas changes on the surface of the material, and the construction of a gas sensor with sensitivity and rapid response to hydrogen sulfide gas is realized.

The invention discloses a preparation method of a nanoparticle bionic enzyme sensitive element, a product and application of the nanoparticle bionic enzyme sensitive element. The method includes: dispersing a two-dimensional nanomaterial in a solvent, adding acetate containing a transition metal source, performing water bath for a certain time at a certain temperature, and conducting freeze drying to remove the solvent; grinding the obtained product, a six-membered heterocyclic compound and a substance amino acid into a uniform mixture, then performing pyrolyzing in an inert atmosphere, and conducting cooling to obtain the nanoparticle bionic enzyme sensitive element. After the prepared sensitive element is prepared into a sensor, the sensor not only has extremely short response time, extremely high reaction sensitivity and relatively low detection limit, but also has excellent selectivity; the material has an important application prospect in the aspect of real-time detection of superoxide anion free radicals released by living cells, and is outstanding in performance, convenient in material taking and beneficial to commercial application.

The invention discloses a preparation method of a nitrogen-doped carbon nanotube supercapacitor. The preparation method comprises the following steps: (1) preparing a stainless steel substrate; (2) carrying out vapor deposition on a one-dimensional carbon nanotube on the stainless steel substrate; (3) carrying out air annealing; and (4) preparing the nitrogen-doped carbon nanotube. Stainless steelis adopted as a substrate to be directly used for preparing the carbon nanotube, and Fe and Ni which are uniformly distributed in the substrate are used as catalysts, so other catalysts do not need to be introduced any more, and the raw material cost is reduced; Fe and Ni based on the stainless steel are uniform in distribution and good in corrosion resistance, and the prepared carbon nanotube isuniform and stable in structure; the specific surface area and the electrochemical activity are improved through air annealing treatment; nitrogen doping treatment can improve the hydrophilicity of the carbon nanotube, and enables the electrode to have an electric double-layer capacitor and a Faraday capacitor at the same time, thereby improving the capacitance performance of the electrode. The method provided by the invention is low in equipment requirement, controllable in cost and short in preparation time, and has a relatively great application prospect.