30results about How to "Play a doping role" patented technology

The invention relates to a doped BaSO 4 Anode material for sodium ion battery and preparation method thereof, comprising the following steps: (1) one-step hydrothermal method for preparing SnO 2 Material; (2) SnO 2 The material was dissolved in deionized water, dilute sulfuric acid solution and Ba(OH) 2 solution, to achieve BaSO 4 Doped SnO 2 Composite material; (3) ZnS / C composite material prepared by carbothermal reduction method: take zinc salt and sulfur source as raw materials and dissolve them in deionized water, and obtain a ZnS material precursor after the reaction, then dissolve the precursor in deionized water, add Organic carbon source, stir until the water evaporates completely, then place in an inert atmosphere and roast; (4) BaSO 4 Doped SnO 2 The composite material and the ZnS / C composite material are mixed in proportion. The doping BaSO that the inventive method makes 4 The prepared electrode material can meet the performance requirements of the negative electrode material of the sodium ion battery, and has a high initial capacity, a good specific capacity, a high first Coulombic efficiency and ideal cycle stability, making the sodium ion battery in the energy storage system status has been elevated.

The invention discloses an amorphous metal powder catalyst for decomposition of water into hydrogen and a preparation method of the amorphous metal powder catalyst. The preparation method comprises the steps that 1, a hydrotalcite-like compound, a molybdenum-containing compound and a tungsten-containing compound are weighed according to the metal ion molar ratio of 1:1:(0.01-1) and mixed to obtain mixed powder; 2, 35-60 L of mixed solution is weighed for use on the basis of every 1 mol of metal ions in the hydrotalcite-like compound; 3, the mixed powder is added into the mixed solution to be evenly mixed, reflux heating is carried out at the temperature of 150-200 DEG C, a stirring reaction is carried out for 20-30 h, and a sediment is obtained; 4, the sediment is heated and dried at the temperature of 120-150 DEG C for 3-5 h after being cleaned, and then is roasted at the temperature of 300-400 DEG C for 2-4 h, and a catalyst precursor is obtained; and 5, the catalyst precursor is subjected to heat preservation at the temperature of 600-700 DEG C for 1.5-10 h, and then naturally cooled to indoor temperature.

The invention provides a preparation method of polyaniline nanotubes. The preparation method comprises the steps of: firstly, taking rodlike silicate clay as a nuclear body, conducting surface initiated polymerization to coat polyacrylic acid, and then conducting oxidative polymerization to coat polyaniline, thereby preparing silicate clay / polyaniline composite; and finally dissolving the rodlike silicate clay with hydrofluoric acid, and then conducting duel-doping to polyaniline to obtain conductive polyaniline nanotubes. Polyacrylic acid coated on the surface of the silicate clay has two aspects of advantages that the surface activity of the silicate clay is increased and polyaniline can be easily adsorbed on the surface; polyacrylic acid can play a role in doping polyaniline, so that an acid is not needed to be additionally added into a polyaniline synthesis system; the hydrofluoric acid applied not only can remove a silicate clay template to produce the polyaniline nanotubes, but also can further improve the conductivity of the polyaniline nanotubes; the silicate clay selected as the template has the advantages of no need of painstakingly conducting artificial synthesis, low cost and the like; and the production cost can be further lowered.