175results about How to "Reunion won't happen" patented technology

The invention relates to a method for preparing hybrid film through graphene / nano crystalline cellulose dispersion liquid. The preparation method comprises the following steps: respectively dispersing oxidized graphene obtained by oxidation treatment and nano crystalline cellulose in a dispersing agent, and then, gradually dripping nano crystalline cellulose dispersion liquid into oxidized graphene dispersion liquid to obtain graphene / nano crystalline cellulose dispersion liquid, adding a reducing agent under ultrasonic or mechanical stirring condition to reduce the oxidized graphene, inserting the crystalline cellulose between graphene pieces to prevent aggregation between the graphene layers and to form uniformly dispersed and stable graphene / nano crystalline cellulose dispersion liquid, and then, preparing a graphene / nano crystalline cellulose hybrid film through such methods as spin coating, spray coating, film casting, and the like. The prepared hybrid film has high uniformity, and the higher the content of the graphene in the hybrid film, the stronger the thermal stability and conductivity of the hybrid film are; the higher the content of nano crystalline cellulose in the hybrid film is, the smaller the contact angle of the hybrid film is, and the stronger the hydrophilicity is.

The invention provides a magnesium-lithium double-ion battery composite cathode material, a preparation method and application thereof, and a battery system, and belongs to the field of magnesium ionbatteries. In the magnesium-lithium double-ion battery composite cathode material, a polyaniline layer has a protective effect on the composite cathode material, and PANI-coated VS4 / rGO is higher in conductivity and of a more complete structure, which is favorable for achieving charging and discharging under a large current density; a PANI conductive layer does not participate in electrochemical reaction, and coats the surface of VS4 to improve the conductivity of VS4, and can well adapt to the charging and discharging process under the high current density; meanwhile, the PANI layer reduces the loss of active substances in the core VS4 during charging and discharging, thus maintaining the structural integrity; and the PANI layer allows VS4 to better adapt to the volume change caused by the intercalation and deintercalation of Mg<2+> and Li<+>, and reduces the loss of the active substances on a current collector, thereby significantly increasing the stable cycle capacity of the cathodematerial.

The invention discloses a dispersion method of a single-walled carbon nanotube. The invention provides a polymer shown in the formula I, and a preparation method of the polymer. In the formula I, i is a natural number between 20 and 150. The dispersion of the single-walled carbon nanotube in an organic solvent can be realized by mixing the polymer shown in the formula I and the single-walled carbon nanotube in an organic solvent. On the basis, a complex of the polymer shown in the formula I and the single-walled carbon nanotube can be obtained after the organic solvent is removed, and the dispersion of the single-walled nanotub in water can be realized by adding the complex into water and introducing CO2 gas. A polymer chain can be ensured to take effect with only one carbon tube by using a pyrene group-containing ATRP initiator (a compound shown in the formula II); the single-walled carbon nanotube can be dispersed by utilizing the polymer shown in the formula I and CO2, so that the carbon tube can be dispersed into the organic solvent and water; and the method is simple, convenient and easy, and mild in conditions; the SWNT dispersed by utilizing the method cannot be agglomerated, can be evenly dispersed, and can be used for further functionalization or industrial processing.

The invention belongs to the technical field of two-dimensional material preparation, and particularly relates to high-concentration high-stability transitional metal chalcogen compound printing ink for ink jet printing and a preparation method of the printing ink. Specific to the problem that as current transitional metal chalcogen compound nano sheet printing ink is low in concentration and poorin stability, the use and storage are inconvenient, the technical scheme of the invention is characterized in that the preparation method comprises the following steps: [1] selecting two kinds of stripping solvents, and preparing a binary good solvent system; [2] adding a water-soluble high-molecular compound into the binary good solvent system to obtain a mixed solvent; [3] stripping a nano sheet of a transitional metal chalcogen compound from transitional metal chalcogen compound powder by using an ultrasound stripping method; [4] performing centrifugal separation, and taking supernate, i.e., transitional metal chalcogen compound nano sheet dispersion liquid; and [5] adding a conditioning agent with a physical property to obtain the transitional metal chalcogen compound printing ink. The transitional metal chalcogen compound printing ink is suitable for the ink jet printing of a transitional metal chalcogen compound two-dimensional material.