59results about How to "Good lamellar structure" patented technology

The invention discloses a nitrogen-doped three-dimensional bicontinuous porous structure ultrathin carbon layer and a preparation method and application thereof. The preparation method comprises the steps that shrimp shell pretreatment is conducted, by taking urea or melamine or pyrrole as a nitrogen source and taking shrimp shells subjected to treatment as a raw material, under inert gas flow, low-temperature pre-carbonization is conducted, then, high-temperature pyrolysis is conducted with alkaline matter, acid treatment is conducted at last, and the nitrogen-doped three-dimensional bicontinuous porous structure ultrathin carbon layer is obtained. The nitrogen-doped three-dimensional bicontinuous porous structure ultrathin carbon layer prepared through the method has a unique nano ultrathin carbon layer structure, a high specific surface area and a total pore volume, is simple in technology, low in cost, friendly to environment, and has good physical and chemical properties. The nitrogen-doped three-dimensional bicontinuous porous structure ultrathin carbon layer can be applied to a supercapacitor, a secondary battery and gas absorption, and a new way for developing new energy biomass materials is opened up.

The invention provides a cathode material of a Li-ion secondary battery, the general formula is LiNiaMnbCocO2-XFX, wherein the relationships that a is more than or equal to 0.1 and less than or equal to 0.45, b is more than or equal to 0.1 and less than or equal to 0.45, c is more than or equal to 0.1 and less than or equal to 0.45 and a+b+c=1 are satisfied; the relationship that X is more than or equal to 0.001 and less than or equal to 0.2 is satisfied; Li-Ni-Mn-Co-Fl composite oxide is in an R-3m rhombus lamellar structure; and in XRD, the value of R is 0.25-0.42. The invention also discloses a preparation method of the cathode material, which comprises the following steps: adding the mixed solution of nickel salt, cobalt salt and manganese salt and precipitator solution containing fluorion into an agitated reactor to react and precipitate; after the reaction is completed, washing and drying the precipitation, and preparing the precipitation into a precursor; mixing the precursor and composite containing lithium in the proportion of mass of 1:1 to 1.1; and sintering in the environment atmosphere containing oxygen at a high temperature. The cathode material provided by the invention has good cycle performance and easy control of metal ion precipitation.

The invention relates to a preparation method of a high-dispersion supported nano metal Fe-based catalyst and belongs to the technical field of Fe-based catalysts. According to the preparation method, an Mg-LDHs precursor containing an iron coordination ion intercalation is prepared by virtue of an intercalation assembly method; and then, with methane as an air source, iron nano particles are further reduced and multiwalled carbon nano tubes grow out simultaneously in one step by virtue of a chemical vapor deposition method, and thus the magnalium composite metal oxide supported high-dispersion iron-based catalyst containing the iron nano particles coated with the multiwalled carbon nano tubes. The high-dispersion supported nano metal Fe-based catalyst is structurally characterized in that the iron nano particles are supported on the surface of the magnalium composite metal oxide after being coated with the multiwalled carbon nano tubes. By utilizing the preparation method, the chemical stability of active nano metal particles is improved, the gather of the active nano particles is restrained, and the structure stability of the catalyst is improved due to the strong interaction between the multiwalled carbon nano tubes and the iron nano particles. When used as a fenton-like catalyst, the high-dispersion supported nano metal Fe-based catalyst shows good catalytic oxidation performance to organic dyestuff methylene blue, the degradation rate reaches 95.0-100%, and the high-dispersion supported nano metal Fe-based catalyst has potential practical application value.