5results about How to "High room temperature ionic conductivity" patented technology

This invention discloses a high-performance polymer electrolyte based on a functionalized fluorinated ether diluent and its preparation method, relating to the field of electrochemical energy storage materials technology. The high-performance polymer electrolyte comprises: a polymer matrix, a lithium salt, an organic dispersion solvent, and a functionalized fluorinated ether diluent. By introducing a fluorinated ether diluent with a specific structure, this invention synergistically regulates the crystallization behavior of the polymer matrix and the lithium-ion solvation structure, solving core problems in traditional polymer electrolytes such as low ionic conductivity, poor interfacial stability, and lithium dendrite growth. The resulting electrolyte possesses high ionic conductivity, high lithium-ion transference number, and excellent interfacial stability, making it suitable for high-energy-density lithium metal batteries.

The invention discloses a solid polymer electrolyte diaphragm as well as a preparation method and application thereof, and the solid polymer electrolyte diaphragm is formed by mixing a polymer monomer of a formula 1 and an electrolyte, then carrying out polymerization reaction and curing to form a film, and the solid polymer electrolyte diaphragm is # imgabs0. The adopted preparation method is mild in condition and simple to operate, the film is directly formed on the surface of a pole piece through an ultraviolet irradiation polymerization process, the interface performance of a battery pack can be improved, the interface resistance between electrodes is greatly reduced, the room-temperature ionic conductivity of the prepared solid electrolyte diaphragm reaches up to (2.3 * 10 <-4 > S / cm, 25 DEG C), and the solid electrolyte diaphragm is nonflammable and has a great application prospect.

The invention relates to the technical field of lithium ion batteries, and discloses a multipolymer, a preparation method thereof, a polymer electrolyte and a solid lithium ion battery. The multipolymer comprises structural units shown in formulas (a), (b) and (c), and structural units shown in formulas (II), (III) and (IV), r1 is alkyl of C2-C4; r2 is H and / or alkyl of C1-C4; r3 is at least one of H, F, Cl, Br, I, methyl, ethyl and phenyl; r4 is at least one of H, methoxyl, ethyoxyl, cyclopentyl, phenyl and p-fluoro substituted phenyl; r5 is H and / or alkyl of C1-C4; r6 is at least one of phenyl, C1-C4 alkyl and fluoroalkyl; m is greater than or equal to 1, p is greater than or equal to 1, n is greater than or equal to 1, and R7 is C1-C4 alkyl; # imgabs0 #

The invention relates to a double-faced adhesive tape-like viscous polymer solid electrolyte membrane and a preparation method thereof, the electrolyte membrane has characteristics similar to that of a double-faced adhesive tape, a porous membrane is used as a three-dimensional network skeleton to provide mechanical strength for the electrolyte membrane, and on the basis, the electrolyte membrane is compounded with a lithium salt, an ionic conductive polymer and an ionic liquid to adjust the proportion of the ionic liquid, so that the electrolyte membrane is prepared. And the similar double-faced adhesive tape type viscous polymer solid electrolyte membrane can be obtained. The preparation method is simple, the obtained viscose type solid electrolyte membrane has high room-temperature ionic conductivity, strong mechanical performance and good stability, the viscosity of the membrane can provide a new bonding process for preparation of a lithium ion battery, positive and negative electrodes can be rapidly and efficiently bonded, bonding is firm, safety and reliability are achieved, a traditional lithium ion battery preparation process can be simplified, and the production cost is reduced. The preparation efficiency of the lithium ion battery is greatly improved, and the production cost of the lithium ion battery is reduced.

The invention relates to the technical field of solid-state batteries, and particularly discloses a modification method for solvent annealing of a solid-state polymer electrolyte membrane and application of the solid-state polymer electrolyte membrane in a secondary ion battery. The amount of solvent molecules introduced into a sample is regulated and controlled through a solvent annealing technology, so that electrochemical side reaction in battery operation can be effectively avoided, surface softening of a solid polymer electrolyte membrane can be realized, contact between the solid polymer electrolyte membrane and a solid electrode material is improved, interface resistance between electrolyte and an electrode is reduced, and the service life of the battery is prolonged. And transmission of metal cations in the charging and discharging process is facilitated. The complexation among solvent molecules, the polymer and the electrolyte salt is beneficial to dissociation of the electrolyte salt so as to obtain more metal cations capable of freely diffusing in the charge-discharge process. Besides, a small amount of complexing solvent molecules can improve the movement capability of a polymer molecular chain, and the improvement of the movement capability of the polymer molecular chain is beneficial to diffusion of dissociated metal cations, so that a polymer electrolyte membrane and a secondary ion battery with high room-temperature ionic conductivity are obtained.