11 results about "Ion transportation" patented technology

The application provides a high-nickel ternary material modification method and a high-nickel positive electrode material with a nitrogen-oxygen coating layer, and relates to the field of lithium ion batteries. In the high-nickel ternary material, surface lattice oxygen is gradually replaced by nitrogen atoms in a high-temperature long-time calcination process in a nitrogen-oxygen mixed atmosphere, so that a nitrogen-oxygen layer is formed on the surface, which is beneficial to the delocalization of electrons, thereby endowing the material with excellent electronic conductivity; meanwhile, the presence of the nitrogen-oxygen layer inhibits the transformation of the surface layer structure into a rock salt phase structure, which is beneficial to realizing efficient ion transport. The formation of the nitrogen-oxygen layer on the surface of the high-nickel ternary material can simultaneously improve the electronic and ionic conduction of the surface of the high-nickel positive electrode material, inhibit the interface side reaction, relieve the volume change, and thereby improve the cycle stability of the battery.

The invention discloses a two-dimensional covalent organic framework separation membrane for an electro-catalysis carbon dioxide reduction reaction system, and belongs to the technical field of separation membranes. The two-dimensional covalent organic framework separation membrane is composed of trialdehyde monomers and various diamine monomers, covalent organic framework nanosheets are prepared through an oil-water-oil three-phase interfacial polymerization process, and then the nanosheets are assembled on a porous substrate through vacuum-assisted assembly. The covalent organic framework separation membrane with high charge density can allow OH <-> to realize rapid ion transportation with minimum resistance under the interaction of size screening and static electricity, and meanwhile, the transmission of CO3 < 2-> is effectively blocked. The covalent organic framework separation membrane has excellent OH <-> transport capacity and relatively high OH <-> / CO3 < 2-> selectivity. According to the invention, effective separation of OH <-> and CO3 < 2-> in an electro-catalysis carbon dioxide reduction reaction system is realized, and the collection efficiency of products in the electro-catalysis carbon dioxide reduction reaction system is improved.

The application discloses an ultrathin asymmetric structure graphene separation membrane and a preparation method thereof, and the method comprises the following steps: obtaining a graphene separation membrane; performing first soaking on the graphene separation membrane in an alkaline aqueous solution to activate functional groups on the edges of graphene nanopores, and then performing flushing to obtain an activated separation membrane; performing second soaking on the activated separation membrane in a chloroacetic acid solution, then adding sodium hydroxide to perform a modification reaction, and then performing flushing after the reaction to obtain an ultrathin asymmetric structure graphene separation membrane. The ultrathin asymmetric structure graphene separation membrane prepared in the application has uniform pore size and ultrahigh surface charge density, and can be applied to the field of ion transportation in a membrane separation process.

The invention relates to the technical field of electrochemical energy storage batteries, in particular to an asymmetric fluorinated electrolyte for a wide-temperature-range lithium battery. The asymmetric fluorinated electrolyte is formed by mixing a lithium salt, an organic solvent and an asymmetric fluorinated solvent according to the molar ratio of 1: (1-10): (1-10), the charge distribution of the asymmetric fluorinated solvent is non-uniform, and the asymmetric fluorinated solvent has stronger electropositive hydrogen atoms and electronegative fluorine atoms. And a stable dual hydrogen-bond interaction is easily established with electronegative oxygen atoms and electropositive hydrogen atoms in an organic solvent in the electrolyte. On one hand, electronegativity of polar groups in the organic solvent is weakened, binding energy of the organic solvent and lithium ions is reduced, transportation of the lithium ions is promoted, and low-temperature performance of the electrolyte is improved; and on the other hand, active hydrogen atoms of the organic solvent are anchored, the electron cloud density on the hydrogen atoms is reduced, the side reaction of the solvent at high temperature is inhibited, the excellent wide-temperature-range performance of the electrolyte can be realized, and a new thought is provided for the design of the electrolyte applied to the wide-temperature-range lithium battery.

The invention relates to a hierarchical microphase separation strain enhanced ionic conductive elastomer fiber and a preparation method and application thereof, the interior of the ionic conductive elastomer fiber has a bicontinuous network structure, and the ionic conductive elastomer fiber comprises an EOEOEA / PAA continuous phase and a PEA / LiTFSI continuous phase which are interpenetrated. According to the fiber, a copolymer P (PEA-co-EOEOEA) is used as a structural framework, an EOEOEA / PAA continuous phase is constructed by an EOEOEA chain segment and PAA based on a hydrogen-bond interaction, a PEA / LiTFSI continuous phase is constructed by a PEA chain segment and LiTFSI based on a strong coordination interaction, the EOEOEA / PAA continuous phase is used as a mechanical reinforcement phase, and the PEA / LiTFSI continuous phase is used as an ion transport phase. Through hierarchical microphase separation engineering and a dual swelling process, a bicontinuous network structure with EOEOEA chain segment (soft segment) / PAA as a mechanical reinforcement phase and PEA chain segment (hard segment) / LiTFSI as an ion transport phase is constructed, collaborative optimization of mechanical properties and conductivity is realized, and the performance of the composite material is improved. The ionic conductive elastomer fiber with ultrahigh stretchability, toughness, rapid self-repairing property and strain-insensitive ionic conductivity is obtained, and meanwhile, simple and continuous preparation of the fiber is realized.

The present disclosure provides "lithium-ion battery additives". A lithium-ion battery cell is presented. The lithium-ion battery cell includes a current collector and an active material layered on the current collector. The active material layer includes an electrode active material, a conductive agent, and a binder, and has a bottom adjacent to the current collector that includes a solid electrolyte. The battery cell further includes a liquid electrolyte that permeates the active material layer, thereby increasing ion transport during cycling through interaction with the solid electrolyte.

The invention discloses a nano confinement channel preparation method based on a bubble-solid interface, a channel and application, and relates to the field of micro-nano fluid technology, interface science and nano confinement ion transportation. The preparation method comprises the following steps: firstly, carrying out interface functionalization treatment on the surface of a solid substrate of a micro-fluidic chip with a micro-fluidic channel to form a hydrophilic functional surface; then injecting an electrolyte into the channel, then introducing gas into the micro-channel to form a single bubble on the hydrophilic functional surface, and forming a nano liquid film between a gas-liquid interface of the bubble and the hydrophilic functional surface to form a nano confinement channel; the confinement height of the channel can be regulated and controlled in situ through the concentration, the type and the pH value of the electrolyte. The device is simple in construction method and dynamically adjustable in performance, and a new platform is provided for researching the nano confinement effect and developing a novel ion screening device.

The invention belongs to the field of anion exchange membranes, and particularly relates to an anion exchange membrane based on piperidine functionalized main-side chain dication and a preparation method of the anion exchange membrane. The preparation method comprises the following steps: carrying out a Friedel-Crafts polymerization reaction on p-terphenyl, N-methyl-4-piperidone and 2, 2, 2-trifluoroacetophenone, so as to synthesize the poly (terphenyl-piperidone-trifluoroacetophenone). The preparation method comprises the following steps: reacting 1, 6-dibromohexane with 1-methylpiperidine to synthesize a hydrophilic long alkyl piperidine cationic side chain; and then adopting a comb grafting strategy to act with main chain piperidine cations, and then carrying out quaternization to obtain the anion exchange membrane. A good hydrophilic / hydrophobic microphase separation structure is constructed, and the hydrophilic phase is beneficial to improvement of OH <-> transmission efficiency and provides an exclusive channel for ion transportation; the hydrophobic phase improves the mechanical property of the membrane; the conductivity is improved by increasing the number of cations, and the dimensional stability and alkali-resistant stability are improved by introducing an ether-free alkyl side chain in a grafting manner.

The application discloses an amphiphilic hydrogel electrolyte and a preparation method and a water-based zinc-manganese battery. The method comprises the following steps: providing a surfactant and an initial electrolyte solution; the electrolyte salt solution is a mixed solution of an electrolyte zinc salt and an electrolyte manganese salt; the surfactant is dissolved in the initial electrolyte salt solution to obtain an electrolyte salt solution containing the surfactant; hydrophobic polymer chain monomers, hydrophilic polymer chain monomers and initiators are sequentially dissolved in the electrolyte salt solution containing the surfactant, and after heating treatment, an amphiphilic hydrogel electrolyte is obtained. The above method only uses the surfactant as a physical crosslinking agent, so that the prepared amphiphilic hydrogel electrolyte has the characteristics of segment dynamic movement, can well control ion transport and optimize electrochemical performance. Moreover, the preparation is achieved by a one-pot method, and the method has the advantages of precise control of the state of the polymer, high repeatability, accurate control of ion concentration, adjustable ion state, and improved electrochemical performance of the electrolyte.

A solid polymer electrolyte and a rechargeable battery includes the solid polymer electrolyte. The solid polymer electrolyte includes a polymer matrix including a vinylidene fluoride (VDF)-based compound and a residual solvent including a fluorinated solvent, wherein the residual solvent is arranged facilitate ion transportation of ions of a solvation complex of a metal in the rechargeable battery.

This invention relates to the field of batteries, specifically to a three-dimensional MXene / carbon synergistic framework-supported silicon-oxygen composite anode material, its preparation method, and a lithium-ion battery. The material comprises an MXene / carbon three-dimensional porous framework and silicon-oxygen active materials, wherein the silicon-oxygen active materials are embedded in the pores of the framework in the form of nanoparticles or in-situ gels. The porous framework is a three-dimensional network structure constructed from MXene sheets and carbon materials. This silicon-oxygen composite anode material exhibits excellent electron and ion transport pathways, and the porous framework can buffer the volume expansion of silicon-oxygen particles.