6results about How to "Reduce interfacial internal resistance" patented technology

The present application relates to the technical field of conductive foil, specifically to a multilayer composite conductive foil and its preparation method and application, specifically comprising the following steps: S1. aluminum foil is immersed in NaOH solution and then cleaned with deionized water, dried to obtain pretreated aluminum foil; S2. using a magnetron sputtering instrument, using a Ti-Zn-C-Ni composite target material to sputter the pretreated aluminum foil, and obtaining a transition layer conductive foil after deposition; S3. the modified functional slurry is coated on the surface of the transition layer conductive foil by a doctor blade coater, then added to an oven for segmented curing, and then annealed, and after cooling to room temperature, a multilayer composite conductive foil is obtained. The present application forms a strong adhesion bottom layer with the substrate through the composite process design of sputtering and coating, blocks the corrosion of electrolyte to the substrate, and also bears the conductive and catalytic functions. The two functional layers obtained by the two processes are further fused through annealing treatment, forming a gradient interface, eliminating interlayer stress, and improving the overall structural stability.

This invention provides a bipolar electrode and a bipolar all-solid-state battery. The bipolar electrode comprises a positive electrode film, a current collector, a bulk material layer, and a carbon material layer. Through the design of the carbonaceous framework and nucleating agent in the bulk material layer, efficient and dense lithium metal deposition is achieved under high voltage conditions. The carbon material layer significantly improves the interfacial contact between the bulk material layer and the all-solid-state electrolyte, reduces interfacial resistance, and improves the deposition and extraction efficiency of lithium metal in the bulk material layer. Furthermore, the carbon material layer provides storage space for lithium metal deposited from the positive electrode, mitigating volume changes during lithium metal deposition in the bulk material layer and improving the stability of the bipolar electrode. The bipolar all-solid-state battery fabricated using the bipolar electrode exhibits high rate capability and long lifespan.

The invention relates to a current collector module and a preparation method thereof, an electrode plate and a battery. The preparation method comprises the following steps: providing a current collector; performing plasma activating treatment on the surface of the current collector; and depositing a bonding enhancement layer on the surface of the current collector subjected to plasma activation treatment to obtain a current collector module, wherein the thickness of the bonding enhancement layer is less than 1 [mu] m. The current collector module prepared by the preparation method of the current collector module provided by the invention has relatively good bonding performance, and can effectively bond the active material layer, so that the electrode plate has relatively good use performance.

The application provides a battery aluminum foil and a preparation method thereof, and relates to the technical field of battery aluminum foils.The preparation method is as follows: S1, hot rolling of an aluminum foil blank to obtain an aluminum foil intermediate body with a thickness of 3.5-4.1 mm; S2, multi-pass cold rolling of the aluminum foil intermediate body under ultrasonic vibration system using lubricating oil to obtain a foil rolling blank with a thickness of 0.35-0.45 mm, wherein, when the cold rolling is rolled to an intermediate pass thickness of 0.6-0.9 mm, complete recrystallization annealing is carried out under nitrogen protection, and the annealing temperature is 400-450 DEG C; S3, foil rolling of the foil rolling blank to obtain an aluminum foil with a thickness of 0.01-0.015 mm; and S4, corona treatment of the aluminum foil, coating of modified paint on the surface of the aluminum foil, drying, and obtaining of the battery aluminum foil.The battery aluminum foil has excellent electrochemical performance, high strength, and high surface roughness.

The application provides a composite manganese-based positive electrode material, a preparation method thereof and a lithium ion battery, and the composite manganese-based positive electrode material comprises a manganese-containing positive electrode material and a coating layer coated on the surface of the manganese-containing positive electrode material, and the coating layer comprises a dioxole-containing organic matter and a 2-oxazolidone-containing organic matter. The manganese-containing positive electrode material is modified by the dioxole-containing organic matter and the 2-oxazolidone-containing organic matter, and the surface of the manganese-containing positive electrode material is physically formed into a film under the action of physical adsorption, which makes the ethylene oxide free radicals in the dioxole-containing organic matter and the 2-oxazolidone in the 2-oxazolidone-containing organic matter rapidly crosslink with each other in the charging and discharging process, so that a uniform, thin and stable CEI film with small polarization degree is formed on the surface of the positive electrode material, the dissolution of manganese is effectively inhibited, the interface resistance is reduced, and the cycle and rate performance of the positive electrode material are improved.

This application provides an electrolyte, a secondary battery, and an electrical device. The electrolyte includes a lithium salt, a non-aqueous solvent, a first additive, and a second additive. The first additive is a compound having a structure as shown in Formula I: Formula I, where n is a natural number, 1 ≤ n ≤ 8. The second additive includes at least one of lithium difluorooxalatoborate, lithium difluorodioxalatophosphate, and lithium fluorosulfonate. Adding a trithiocarbonate additive containing cyano and trimethoxysilane substituents, as well as a lithium salt-based second additive, to the electrolyte can significantly improve the interfacial stability and reduce the interfacial internal resistance of the secondary battery, thereby enhancing the electrochemical performance of the secondary battery at high voltages.