6results about How to "Improve rate discharge performance" patented technology

In order to overcome the problems of insufficient ion conduction efficiency and interface side reaction between the existing sulfide solid electrolyte and a positive electrode, the invention provides a solid-state battery and a preparation method thereof, and the solid-state battery comprises a positive electrode plate and a negative electrode assembly which are stacked in sequence, the positive plate comprises a positive current collector and a positive material layer arranged on the surface of the positive current collector, the negative assembly comprises a negative plate, a sulfide electrolyte layer and a polymer electrolyte layer, the sulfide electrolyte layer is located on the surface of the negative plate, and the polymer electrolyte layer is located on the surface of the sulfide electrolyte layer. A corrugated groove is formed in the surface, deviating from the negative plate, of the sulfide electrolyte layer, the polymer electrolyte layer is located in the corrugated groove, and the polymer electrolyte layer abuts against the positive electrode material layer and partially permeates into the positive electrode material layer.

The application discloses a high-rate valve-regulated lead-acid battery and a preparation method thereof. The battery comprises a battery shell, a positive plate, a negative plate and an electrolyte arranged in the battery shell. The positive plate and the negative plate are both honeycomb lattice structure plates, and the positive plate is coated with a positive active material, and the negative plate is coated with a negative active material. The components of the positive active material include lead powder, graphite, sulfuric acid, nano lead dioxide and pure water. The components of the negative active material include lead powder, barium sulfate, sodium lignosulfonate, graphene composite additive and carbon black. The discharge rate of the high-rate valve-regulated lead-acid battery can reach 3-5C, and the discharge capacity retention rate is above 95% under the 1C discharge rate, which can meet the demand of 5G base stations, data centers and other fields for instantaneous large current and high power output.

This invention belongs to the field of lithium battery material technology, specifically relating to a metal oxide / mesoporous manganese dioxide / conductive polymer composite material, its preparation method, and its application. The preparation method includes the following steps: 1) ball milling a commercial metal oxide; 2) mixing the metal oxide powder with an organic polymer monomer and a methyl orange solution and ultrasonically dispersing the mixture to obtain a liquid mixture; 3) adding a potassium permanganate solution to the liquid mixture and performing a high-pressure hydrothermal reaction under stirring to obtain the composite material; 4) subjecting the composite material to alkali treatment, filtering, washing with water, and drying to obtain the metal oxide / mesoporous manganese dioxide / conductive polymer composite material. This metal oxide / mesoporous manganese dioxide / conductive polymer composite material can be used to prepare lithium battery cathode materials with high specific capacity, high conductivity, and high stability in a simple, efficient, and low-cost manner. It is easy to industrialize and solves the problems of low conductivity and poor rate discharge performance of traditional metal oxide cathode materials.

This invention discloses a lithium-sulfur battery binder, its preparation method, and its application, belonging to the field of lithium-ion battery technology. The binder is prepared by grafting polyvinyl alcohol (PVA) with 3-(3,4-dihydroxyphenyl)-DL-alanine (DOPA) onto the PVA molecular chain, with a molar ratio of (0.9~1.2):(0.2~1). This invention, through directional molecular structure design of the binder, simultaneously achieves rapid lithium-ion conduction, improved electrochemical reaction kinetics, and optimized electrode mechanical structure stability, solving the industry problem of traditional lithium-sulfur battery binders' single-performance limitations and inability to meet multiple electrode requirements. The preparation method employs a controllable grafting reaction to functionalize the binder's polymer backbone, introducing sufficient polar functional groups and lithium-ion conduction active sites onto the molecular chain. This balances the stability of the polymer chain's cross-linking structure with electrode interface affinity, synergistically improving interfacial ion transport efficiency. The binder provided by this invention has broad application prospects in lithium-sulfur batteries.

The application discloses a secondary electrolyte injection method and an alkali metal ion battery thereof, and the secondary electrolyte injection method comprises the following steps: injecting a first electrolyte into a semi-finished product battery cell and sealing, aging, standing and forming, wherein the first electrolyte comprises an electrolyte salt, a non-aqueous solvent and a basic additive; continuously injecting a second electrolyte, and obtaining an alkali metal secondary battery after secondary sealing and capacity distribution; the second electrolyte comprises the first electrolyte, a first additive and a second additive; the first additive is lithium fluorosulfonate or sodium fluorosulfonate, and the second additive is at least one of a fluorine-containing pyridine compound shown in the following formula (I) or a fluorine-containing imidazole compound shown in the following formula (II), and the specific structure is referred to the description. Through the secondary injection of the first additive and the second additive, the high-temperature cycle performance, the high-temperature storage performance and the low-temperature cycle performance of the battery can be improved, the rate discharge performance of the battery is improved, and the power of the battery is improved.

This invention discloses a high-power battery integrating a radioactive structure and a multi-element corrosion-resistant alloy, belonging to the field of lead-acid battery technology. It constructs a core component integrating a radioactive grid structure and a multi-element corrosion-resistant alloy. The radioactive grid adopts a centrally radiating structure, with 8-12 variable cross-section radial grid bars and 3-4 rings of progressively spaced annular grid bars forming a closed conductive network. The multi-element alloy is composed of Pb 98.5%-99.2%, Sn 0.3%-0.8%, Ag 0.05%-0.1%, Ca 0.06%-0.12%, and Al 0.03%-0.05%, with precise matching between composition and structure. The battery is manufactured through medium-frequency induction melting, controlled-cooling grid forming, stepped heat treatment, and optimized assembly processes. The battery has a C10 capacity of not less than 100Ah, a P15min discharge time of not less than 15min, a cycle life of not less than 780 cycles, a grid corrosion rate of not more than 0.023mm / a, and an energy utilization rate of not less than 87%. This design overcomes the performance bottleneck of traditional grid-alloy separation designs, combining high power, long lifespan, and high stability.