5 results about "Chlorine doping" patented technology

This invention discloses a method for preparing a seawater-resistant, chlorine-doped carbon-based electrode material with five-membered ring defects. The method includes step one: mixing the chlorine-doped system; step two: pyrolysis activation treatment; step three: cooling and washing; and step four: rewashing and drying. This invention utilizes the synergistic construction of chlorine doping and five-membered ring defects. The localized negative charge induced by chlorine doping enhances its resistance to chloride ions in seawater, significantly improving the material's stability and service life in a seawater environment. The five-membered ring defects significantly improve the electronic structure and catalytic activity of the carbon material, thereby enhancing its electrocatalytic performance and improving the overall electrochemical performance of the carbon-based electrode material. The introduction of chlorine doping during the preparation process also serves as a template to promote the construction of porous nanosheet structures in the carbon material. The method is simple to operate, low in cost, and suitable for large-scale production. It balances structural innovation, superior performance, and process feasibility, possessing broad industrial prospects and technological promotion value.

The application relates to the technical field of sodium ion batteries, in particular to a chlorine-doped sodium iron sulfate composite positive electrode material and a preparation method and application thereof, which comprises a chlorine-doped sodium iron sulfate positive electrode material and carbon, and the mass ratio of the chlorine-doped sodium iron sulfate positive electrode material and the carbon is 1:0.01-0.1; the chemical formula of the chlorine-doped sodium iron sulfate positive electrode material is Na 2.4 Fe 1.8 (SO4) 3‑0.5y Cl y , wherein 0 The application adopts a modification strategy of doping oxygen sites with chlorine ions with a large ionic radius, adjusts the local crystal structure of sodium iron sulfate, expands the cell volume, provides more sufficient migration space for sodium ions, especially improves the sodium ion migration activity of the Na1 / Na2 sites, and further improves the specific capacity, rate performance and cycle life of the sodium iron sulfate.

The application belongs to the technical field of photothermal conversion materials, and particularly relates to a photothermal conversion coating, a preparation method thereof and a photothermal conversion device. The preparation method of the photothermal conversion coating comprises the following steps: obtaining a porous substrate, adsorbing an initiator in the porous substrate in situ to obtain a modified porous substrate, and performing a gas phase polymerization reaction on the modified porous substrate with a conjugated polymer monomer and a chlorine source to form a chlorine-doped photothermal conversion coating on the surface of the porous substrate in situ. In the preparation method of the photothermal conversion coating, the initiator is adsorbed in the porous substrate in situ, and the conjugated polymer monomer is diffused in the form of gas on the surface layer of the substrate, so that the monomer is polymerized in the pores of the substrate in situ, and the combination firmness of the coating and the substrate is improved. Meanwhile, the structuralization and doping effects improve the utilization rate of the coating to light energy, so that the photothermal conversion coating has the characteristics of high solar spectrum absorption efficiency, wide light absorption range, high absorption degree and high utilization rate, and exhibits super strong photothermal effect.

The invention discloses a preparation method of a chlorine-doped PbS colloidal quantum dot film, and relates to the technical field of PbS colloidal quantum dot film doping, in particular to a Cl-doped colloidal quantum dot. The chlorine-doped PbS colloidal quantum dot film is formed by doping 1 * 10 <-3 > M Cl in PbS colloidal quantum dots. The preparation method comprises the steps of preparation of PbS colloidal quantum dot powder, preparation of a PbS colloidal quantum dot film, preparation of an HCl / ethanol solution and doping. According to the solution method doping, expensive equipment of doping technologies such as ion implantation and thermal diffusion does not need to be used, the experiment cost is greatly reduced, and commercialized application becomes possible.

The invention relates to the technical field of sodium ion batteries, in particular to a chlorine-doped sodium ferric sulfate composite positive electrode material and a preparation method and application thereof, the chlorine-doped sodium ferric sulfate composite positive electrode material comprises a chlorine-doped sodium ferric sulfate positive electrode material and carbon, and the mass ratio of the chlorine-doped sodium ferric sulfate positive electrode material to the carbon is 1: 0.01-0.1; the chemical formula of the chlorine-doped sodium ferric sulfate positive electrode material is Na < 2.4 > Fe < 1.8 > (SO4) < 3-0.5 > y Cly, wherein y is more than 0 and less than or equal to 0.2. According to the invention, a modification strategy of doping chloride ions with oxygen sites with large ion radius is adopted, a more sufficient migration space is provided for sodium ions by adjusting the local crystal structure of sodium ferric sulfate, enlarging the unit cell volume and the like, and particularly, the migration activity of sodium ions at Na1 / Na2 site is improved, so that the specific capacity and rate capability of sodium ferric sulfate are improved, and the cycle life of sodium ferric sulfate is prolonged.