5results about How to "Facilitates ion diffusion" patented technology

The invention belongs to the field of polymer batteries, and particularly relates to a polymer solid-state battery electrolyte, a solid-state lithium battery and a method. The polymer solid-state battery electrolyte comprises one or more groups selected from an alcohol group, a hydroxyl group, an amine group, a halogenated group, a sulfonic acid group, an acyl group, a dilute hydrocarbon material and a carboxyl group, a film has high thermal stability, and the average coulombic efficiency of a battery of the polymer electrolyte is higher than 99%. The polymer solid-state battery electrolyte has high cycling stability, the membrane of the polymer solid-state battery electrolyte has good ionic conductivity, exchange and transmission of lithium ions are promoted, the high ionic conductivity of the membrane reflects good ion diffusion and migration ability of the membrane, and the membrane has a high electrochemical window; the membrane of the polymer solid-state battery electrolyte improves the contact or compatibility effect of an electrode and a solid-state electrolyte interface, and the membrane of the polymer solid-state battery electrolyte has profound significance in solid-state batteries and electrolytes.

This invention discloses a high-rate carbon-coated lithium iron phosphate cathode material and its preparation method, relating to the field of lithium-ion battery cathode material technology. The material constructs a unique bilayer composite carbon-coated structure on the surface of lithium iron phosphate particles, including an inner continuous dense conductive carbon layer and an outer three-dimensional porous carbon network layer. The inner carbon layer ensures rapid electron conduction, while the outer porous carbon layer maintains electron pathways, provides abundant ion diffusion channels, and buffers volume changes. The preparation method utilizes a stepwise liquid-phase coating and segmented heat treatment process. This invention effectively solves the problems of poor electronic conductivity and slow ion diffusion in lithium iron phosphate materials, significantly improving its high-rate charge-discharge performance and cycle stability. Furthermore, the process is controllable and suitable for large-scale production, showing broad application prospects in power batteries and high-power energy storage.

The invention discloses a preparation method and application of a porous nickel diselenide nanowire, and relates to the field of energy storage material preparation and performance research, the preparation process is as follows: firstly, under the condition of no template and surfactant, a soluble nickel salt and an alkali mixture are subjected to a hydrothermal reaction to obtain a precursor nickel hydroxide nanowire; and then under the protection of inert gas, performing heat treatment on the precursor by using selenium powder to obtain the nickel diselenide nanowire with a porous structure. The preparation method disclosed by the invention is simple and easy to implement, does not need a template, a surfactant and complex equipment, and is low in cost; the prepared nickel diselenide nanowire has a porous structure, has a large specific surface area, and has a wide application prospect in the fields of energy storage, catalysis and the like. The prepared porous nickel diselenide nanowire is used as a supercapacitor electrode material, shows large specific capacity, good rate capability and excellent cycling stability, and is a supercapacitor positive electrode material with application prospects.

This invention provides a thick electrode, its preparation method, and its applications. The thick electrode includes a current collector and at least two electrode layers located on the surface of the current collector. An electrospun layer is disposed between the electrode layers. The active material in the electrode layer closer to the current collector surface is a large-particle-size active material, while the active material in the electrode layer farther from the current collector surface is a small-particle-size active material. This invention improves the electrode loading and thickness by designing at least two electrode layers and optimizing the particle size distribution of the main active material in each layer, thereby increasing the specific capacity and energy density of the battery. Simultaneously, the electrospun layer connects the electrode layers, creating a porosity gradient distribution along the direction perpendicular to the electrode, constructing efficient ion diffusion and conduction channels and electron transport channels. This results in good ion diffusion and conduction, reduces polarization during charging and discharging, and ensures high energy density and power performance of the battery.

The invention provides a sodium-ion battery negative electrode material and a preparation method thereof, a sodium-ion battery and electric equipment, and relates to the technical field of sodium-ion battery negative electrode materials. The preparation method of the sodium ion battery negative electrode material comprises the following steps: mixing organic acid, organic amine and water to obtain a solution A, and mixing an additive, a P-123 copolymer, an F-127 copolymer and water to obtain a solution B; mixing the solution A and the solution B to obtain a solution C; carrying out hydrothermal treatment on the solution C, and carrying out solid-liquid separation to obtain a hollow graded carbon sphere precursor; mixing the hollow graded carbon sphere precursor, a thiazole compound and an organic solvent to obtain a mixed material; and roasting the mixed material in a protective atmosphere. A P-123 copolymer and an F-127 copolymer are used as soft template agents of a hollow graded carbon sphere precursor, and a thiazole compound is used for doping and coating heteroatoms, so that the sodium ion battery negative electrode material with ultra-long cycle capacity is obtained.