31 results about "Plastic crystal" patented technology

The invention discloses a multi-scale synergistically enhanced self-healing solid polymer electrolyte and a preparation method thereof, and belongs to the technical field of electrolyte materials. The preparation method of the electrolyte comprises the following steps: S1, adding the eight-arm star polymer, the carborane lithium salt, the neutral plastic crystal additive, the ionic liquid monomer and the crown ether functionalized boron alkene two-dimensional filler into a mixed solvent to form electrolyte slurry; s2, uniformly coating a base material with the electrolyte slurry to form a wet film, and drying the wet film; s3, transferring the dried membrane to an environment filled with inert gas, and initiating in-situ polymerization of an ionic liquid monomer by using ultraviolet irradiation to form a polyionic liquid nanofiber network; and S4, placing the membrane under a vacuum condition at a constant temperature of 120 DEG C for 5 hours to obtain the solid polymer electrolyte membrane. The solid polymer electrolyte membrane provided by the invention overcomes the problems of low ionic conductivity, low lithium ion transference number, insufficient mechanical properties, poor interface stability, narrow electrochemical window and the like of the existing solid polymer electrolyte.

The invention discloses a fluorinated polymer and application thereof in an electrode protection layer and a solid electrolyte, and belongs to the technical field of lithium metal secondary batteries, and the fluorinated polymer is obtained by reacting acrylate functionalized polyethylene glycol, HFBA and an initiator. When the fluorinated polymer is used as a lithium metal negative electrode protective layer, the LiFePO4 / Li total battery protected by the polymer shows more excellent cycle performance compared with an unprotected total battery. And the battery is stable in cycle performance, high in capacity retention rate and low in capacity fading speed. When the fluorinated polymer is applied to the solid-state electrolyte, the polymer solid-state electrolyte in which a polymer network wraps an ionic conductive plastic crystal can be formed through an in-situ reaction, so that the growth of Li dendritic crystals is effectively inhibited, and the stability of the polymer electrolyte and a lithium negative electrode is ensured. Moreover, the solid electrolyte can be adapted to a high-nickel ternary positive electrode material, and a thought is provided for realizing a stable and safe high-energy-density battery.

The invention discloses a low-temperature high-conductivity composite solid-state electrolyte membrane and a preparation method and application thereof, and relates to the technical field of solid-state lithium battery materials, the low-temperature high-conductivity composite solid-state electrolyte membrane comprises: a polymer matrix composed of poly (1, 3-dioxolame) and a polyvinylidene fluoride-hexafluoropropylene copolymer; the ion conduction network is composed of a metal organic framework filler with the surface modified with-SO3Li groups and sulfonic acid lithiated carbon nanotubes arranged in the axial direction of the polymer matrix; a first anti-freezing interface layer and a second anti-freezing interface layer are arranged on the surfaces of the two opposite sides of the polymer matrix, and the first anti-freezing interface layer and the second anti-freezing interface layer are butanedinitrile-glutaronitrile eutectic plastic crystal layers composed of butanedinitrile, glutaronitrile, lithium salt and a nano reinforcing agent respectively. The solid electrolyte is suitable for polar scientific investigation equipment, spacecrafts and other low-temperature environments, and solves the industrial problems of sharp increase of low-temperature grain boundary impedance and interface contact failure of the traditional solid electrolyte.

The utility model provides a bendable crystal strip which comprises a plurality of plastic crystal single bodies, the section of each plastic crystal single body is in an L shape, the side walls of one sides of every two adjacent plastic crystal single bodies in the section direction are connected through a plastic crystal, and the plastic crystal and the two adjacent plastic crystal single bodies are integrally formed. The side walls of the other sides, in the section direction, of every two adjacent plastic crystal single bodies are spaced by a certain distance to form a buffer gap, and the buffer gaps are used for providing bending receding of the crystal strips. By adopting the scheme, for the crystal chain, the material cost of the crystal lamp is further reduced on the basis of saving the assembly cost; for a PC crystal strip structure, the PC crystal strip structure is made of a crystal integrated material, so that a light-transmitting form that a light source directly irradiates on the front surface of the crystal strip can be met, various light emitting modes that the light source emits light on the back surface, the side surface and the end surface of the crystal strip can be realized, and a crystal strip-shaped frame is not arranged, so that the thickness is relatively thin, and the light emitting brightness is increased.

A battery component and a method for forming a battery component are described. The battery component can include a negative electrode assembly, a positive electrode assembly, and a solid electrolyte membrane layered between the negative and positive electrode assemblies. The solid electrolyte membrane has a binder matrix containing sulfide-based solid electrolyte particles with plastic crystal electrolyte particles occupying pores between the sulfide-based solid electrolyte particles.

The application discloses a kind of self-healing solid-state polymer electrolyte of multiscale synergistic enhancement and preparation method thereof, belong to electrolyte material technical field.The preparation method of electrolyte: S1, eight-arm star polymer, lithium carborane salt, neutral plastic crystal additive, ionic liquid monomer, crown ether functionalized boronene two-dimensional filler are added into mixed solvent to form electrolyte slurry;S2, electrolyte slurry is uniformly coated on substrate to form wet film, and is dried;S3, the film of drying is transferred to the environment filled with inert gas, and in-situ polymerization of ionic liquid monomer is initiated using ultraviolet irradiation to form polyionic liquid nanofiber network;S4, the film is placed at 120 DEG C under vacuum condition for 5 h, and solid-state polymer electrolyte film is obtained.The solid-state polymer electrolyte film of the application overcomes the problems of low ionic conductivity, low lithium ion transference number, insufficient mechanical properties, poor interface stability, narrow electrochemical window and other problems existing in existing solid-state polymer electrolyte.

The present technology relates to an ionic plastic crystal comprising at least one delocalized anion paired with at least one an organic guanidine, amidine or phosphazene organic superbase-derived cation for use in electrochemical applications, particularly in electrochemical accumulators such as batteries, electrochromic devices, and supercapacitors. The present technology also relates to an ionic plastic crystal composition, an ionic plastic crystal-based solid electrolyte composition, an ionic plastic crystal-based solid electrolyte, an electrode material comprising the ionic plastic crystal or the ionic plastic crystal composition. Their uses in electrochemical cells and electrochemical accumulators as well as their processes of manufacturing and an NHO-stabilized intermediary ion-neutral complex are also described.

The invention belongs to the technical field of phase change heat storage and heat exchange, and particularly relates to a heat exchange and heat storage method and system for realizing controllable heat absorption and release time sequence based on a periodic mechanical stress triggered plastic crystal non-equilibrium phase, a lower cold fluid applies thrust to a baffle when flowing, if the cold fluid and the hot fluid are gas, a pressure difference exists between the upper side and the lower side of a roller, and if the cold fluid and the hot fluid are gas, the pressure difference exists between the upper side and the lower side of the roller; rolling the drum; in the rolling process, the steel balls in the steel ball cylinder reciprocate along the path of the steel ball cylinder under the action of gravity, and when the steel ball cylinder moves to the lower part of the roller, the steel balls impact the inner wall of the roller to induce the plastic crystal material to be converted from an unbalanced phase to an ordered crystal phase, so that heat is released; when the steel ball cylinder moves to the upper part of the roller, the steel balls do not impact the inner wall of the roller, and the material is converted into a plastic crystal phase from a crystal phase again and absorbs heat. The device is simple in overall structure, high in stability and easy to maintain; meanwhile, the heat exchange process is more continuous, large temperature difference between the module and cold and hot fluid can be kept all the time, the heat exchange efficiency is improved, meanwhile, the heat exchanger is suitable for various working conditions, and specific heat exchange fluid states and types are not required.

The invention discloses a positive electrode material as well as a preparation method and application thereof, and relates to the technical field of batteries. The positive electrode material is coated with a composite plastic crystal composed of an ionic plastic crystal and a lithium salt in a molar ratio of 1: 3-1: 5; in the preparation of the positive pole piece, the problems of interface impedance and stability of sulfide electrolyte are solved through the dielectric property and fluidity of composite plastic crystal by using a non-polar mixed solvent, a composite plastic crystal infiltration process and low-temperature annealing treatment for cooperative treatment during the preparation of the positive pole piece; a specific type of non-polar mixed solvent is selected, so that dissolution and decomposition of sulfide electrolyte can be reduced to the maximum extent; a three-dimensional lithium conduction network formed by infiltration of the composite plastic crystal coating layer and the melt ensures that the sulfide electrolyte constructs a continuous transmission path in a wet process; and the low-temperature annealing treatment promotes interface fusion of plastic crystals and sulfide electrolyte to form a stable high-conductivity ion phase, so that the comprehensive performance of the battery is promoted to be remarkably improved.

The invention belongs to the field of lithium ion batteries, and relates to a silver salt modified polyacrylonitrile quasi-solid electrolyte, a preparation method thereof and a lithium ion battery. The quasi-solid polymer electrolyte comprises polyacrylonitrile, a lithium salt, a plastic crystal and a silver ion additive, based on the total weight of the quasi-solid electrolyte, the weight content of the polyacrylonitrile is 35-65%, the weight content of the lithium salt is 20-50%, the weight content of the plastic crystal is 3-35%, and the weight content of the silver ion additive is 0.01-10%. The strong oxidizing property of Ag < + > ions is utilized, a large number of Ag nano-particles can be formed on the surface of the Li negative electrode, the particles can serve as nucleation sites, uniform deposition of Li on the negative electrode side is induced, and improvement of the cycle performance of the solid-state battery is promoted. The quasi-solid electrolyte provided by the invention has higher conductivity and better cycle performance.

This invention relates to the field of new materials, specifically to an organic ionic plastic crystal that facilitates the conduction of anions and cations and its preparation method. The method involves adding different concentrations of anion and cation additives to a tetrafluoroborate-based quaternary ammonium salt plastic crystal, dissolving them in an appropriate amount of acetonitrile, stirring thoroughly, removing the solvent by rotary evaporation, and then vacuum drying to obtain a mixture doped with different concentrations of anions and cations. The tetrafluoroborate-based quaternary ammonium salt plastic crystal obtained by the above method exhibits an ionic conductivity close to practical values ​​after the introduction of anions and cations. The internal conduction of anions and cations can improve the conductivity of the organic ionic plastic crystal, providing a possibility for developing solid electrolytes with high conductivity.

A battery component and methods of forming a battery component are presented. The battery component may include a negative electrode assembly, a positive electrode assembly, and a solid electrolyte membrane layered between the negative electrode assembly and the positive electrode assembly. The solid electrolyte membrane has a binder matrix containing sulfide-based solid electrolyte particles with plastic crystal electrolyte particles occupying pores between the sulfide-based solid electrolyte particles.

The application relates to the technical field of lithium batteries, in particular to a solid electrolyte, a battery and a preparation method thereof. In the application, fluorine polymers (including a composite of multiple fluorine polymers) are used as a matrix, ion plastic crystals and lithium salts are introduced, the component structure is adjusted and controlled, and the proportion of each component is optimized, so that a fluorine polymer / plastic crystal solid electrolyte is prepared. In the application, the solid electrolyte prepared by the above method has high room temperature ionic conductivity, and can realize fast charging and long cycle of a lithium secondary battery.

The present disclosure relates to a polymer electrolyte. The polymer electrolyte includes a lithium salt polymer including an anionic functional group and including a salt having the anionic functional group and lithium, and a substance having plastic crystal properties. The present disclosure provides polymer electrolytes that improve electrical properties, in particular polymer electrolytes that improve lithium ion transference number.

The invention discloses a succinonitrile composite modified PEO-based solid electrolyte and a preparation method thereof. The electrolyte comprises sodium carbonate, DMF (Dimethyl Formamide), PAN (Polyacrylonitrile), PEO (Polyethylene Oxide), succinonitrile, LiTFSI (LiTFSI) and acetonitrile, and a porous structure formed by interweaving nanofiber membranes is formed. The preparation method comprises the following steps: carrying out ball milling, drying and calcining on sodium carbonate to obtain Beta powder; dissolving PAN and Beta powder in DMF, and performing electrostatic spinning to obtain a porous film; and finally, compounding a solution of PEO, LiTFSI and succinonitrile with the thin film, and drying to obtain the solid electrolyte. According to the electrolyte, the ionic conductivity and the lithium ion transference number are improved through the cooperation of the ceramic filler, the plastic crystal material and the polymer, the growth of lithium dendrites is inhibited, and the electrode / electrolyte interface stability is improved.

The present disclosure relates to a polymer electrolyte. The polymer electrolyte includes a lithium salt polymer including an anionic functional group and a salt with lithium, and a substance having plastic crystal properties. The present disclosure provides the polymer electrolyte improved in electrical performance, in particular, the polymer electrolyte improved in lithium ion transport number.

This invention relates to the field of solid-state refrigeration materials with pressure-sensitive effects, and discloses a technical method for improving the adiabatic temperature change decay of plastic crystal materials under constant pressure cycling conditions. The method involves uniformly mixing ammonium iodide plastic crystal grains with silicone oil to form a coating composite system with lubricating and isolating functions. A spherical shell encapsulation structure is then fabricated using PA12 nylon powder via laser sintering 3D printing. The composite system is filled and sealed within the spherical shell to form a stable encapsulation unit. During programmed pressurization and depressurization cycles of the encapsulation unit under constant pressure conditions, the silicone oil effectively reduces inter-grain friction and stress concentration, while the spherical shell structure prevents the loss of the coating medium and maintains the integrity of the system, thereby significantly suppressing the decay of the adiabatic temperature change of the plastic crystal material with increasing cycle count.

The invention discloses a manufacturing method of a ceramic-based all-solid-state battery. The manufacturing method comprises the following steps: preparation of a solid electrolyte, preparation of an organic ion plastic crystal transition layer, preparation of a positive plate and preparation of a negative plate, and sequentially laminating the positive plate, the organic ion plastic crystal transition layer, the solid electrolyte, the organic ion plastic crystal transition layer and the negative plate, and carrying out hot pressing to obtain the all-solid-state battery. Organic ion plastic crystal solids are clamped between the positive plate and the solid electrolyte as well as between the negative plate and the solid electrolyte to serve as transition layers, and the organic ion plastic crystal transition layers are ensured to be tightly attached and contacted with the positive plate, the negative plate and the solid electrolyte in a heating and pressurizing manner, so that the interface battery is effectively reduced, and the cycle performance is improved.

The present technology relates to an ionic plastic crystal comprising at least one delocalized anion paired with at least one an organic guanidine, amidine or phosphazene organic superbase-derived cation for use in electrochemical applications, particularly in electrochemical accumulators such as batteries, electrochromic devices, and supercapacitors. The present technology also relates to an ionic plastic crystal composition, an ionic plastic crystal-based solid electrolyte composition, an ionic plastic crystal-based solid electrolyte, an electrode material comprising the ionic plastic crystal or the ionic plastic crystal composition. Their uses in electrochemical cells and electrochemical accumulators as well as their processes of manufacturing and an NHO-stabilized intermediary ion-neutral complex are also described.

The application relates to a preparation method and application of a composite plastic crystal electrolyte with a molecular brush. The application belongs to the technical field of electrolyte materials. The composite plastic crystal polymer electrolyte material with the molecular brush is characterized in that the composite plastic crystal polymer electrolyte material is composed of a diaphragm with a molecular brush and a plastic crystal electrolyte obtained by in-situ polymerization in the diaphragm. A mixed solution of polymer monomers, lithium salt, additives and plastic crystal materials is heated to obtain the plastic crystal electrolyte. The application aims to solve the problem of uncontrollable side reactions in the plastic crystal electrolyte, so that the assembled battery can be stably and long-term cycled at room temperature. The preparation method comprises the following steps: (1) preparing the diaphragm with the molecular brush; (2) preparing a mixed solution of the polymer monomers, the lithium salt and the plastic crystal material, and mixing the mixed solution with the treated diaphragm. The application has the advantages of simple preparation process, good mechanical strength, long cycle life of the assembled battery and the like.

The present disclosure provides an electric double layer capacitor with an electrolyte layer which suppresses leakage current and has high ion conductivity. The electric double layer capacitor includes a pair of electrode bodies and an electrolyte layer. The electrode bodies have polarizable electrodes. The electrolyte layer includes ionic liquid plastic crystals.

This invention discloses a low-temperature high-conductivity composite solid electrolyte membrane, its preparation method, and its applications, relating to the field of solid-state lithium battery materials technology. The low-temperature high-conductivity composite solid electrolyte membrane comprises: a polymer matrix composed of poly(1,3-dioxolane) and polyvinylidene fluoride-hexafluoropropylene copolymer; an ion-conducting network composed of a metal-organic framework filler with surface-modified -SO3Li groups and lithium sulfonate carbon nanotubes arranged axially along the polymer matrix; and a first antifreeze interface layer and a second antifreeze interface layer disposed on opposite sides of the polymer matrix, wherein the first and second antifreeze interface layers are respectively succinic anion exchanger-glutaronitrile eutectic plastic crystal layers composed of succinic anion exchanger, glutaronitrile, lithium salt, and nano-reinforcing agents. It is suitable for low-temperature environments such as polar scientific research equipment and spacecraft, solving the industrial problems of drastic increase in low-temperature grain boundary impedance and interface contact failure in traditional solid electrolytes.

The present invention provides an all-solid-state rechargeable battery capable of suppressing deterioration of battery performance due to charging and discharging even when external pressure is not applied or under low confinement pressure. There is provided a positive electrode for an all-solid-state rechargeable battery, the positive electrode including a positive electrode current collector and a positive electrode mixture layer stacked on the positive electrode current collector, in which the positive electrode mixture layer includes a positive electrode active material capable of intercalating and deintercalating lithium ions, a sulfide solid electrolyte, and a positive electrode active material containing 1, 1, 2, 2, 3, 3-hexafluoropropane-1, 2, 3, 3-hexafluoropropane-1, 1, 2, 2, 3, 3-hexafluoropropane. The invention relates to an ionic soft viscous crystal of 1, 3-disulfonyl imide anions.

The invention belongs to the field of lithium ion batteries, and relates to a polyacrylonitrile quasi-solid electrolyte, a preparation method thereof and a lithium ion battery. The quasi-solid polymer electrolyte comprises polyacrylonitrile, a lithium salt, a plastic crystal and a urea additive, based on the total weight of the quasi-solid electrolyte, the weight content of the polyacrylonitrile is 35-65%, the weight content of the lithium salt is 20-50%, the weight content of the plastic crystal is 3-35%, and the weight content of the urea additive is 0.01-10%. According to the invention, the urea compound is introduced as an additive, and the adsorption of the urea compound to lithium ions is utilized to induce the uniform deposition of the lithium ions on the negative electrode side, so that the growth of lithium dendrites is inhibited, and the improvement of the cycle performance of the solid-state battery is promoted. The quasi-solid electrolyte provided by the invention has higher conductivity and better cycle performance.

This invention discloses a composite solid electrolyte membrane, its preparation method, and a battery, belonging to the field of battery material technology. The preparation of the composite solid electrolyte membrane includes: mixing a first lithium salt, polyethylene oxide, and filler, followed by annealing and pressing into a membrane. The preparation of the filler includes: mixing succinic anionylene, a second lithium salt, and a metal-organic framework material under vacuum, followed by ultrasonic treatment. The metal-organic framework material confines the succinic anionylene molecules within its pores, significantly reducing the plasticizing effect of succinic anionylene on the polymer chain segments, which is beneficial for improving the mechanical properties of the polymer electrolyte. Simultaneously, with the increase of the metal-organic framework material content, the succinic anionylene in the pores forms a connected three-dimensional network structure, which can improve the conductivity of the electrolyte and reduce impedance; furthermore, due to the unique solid-state characteristics of the plastic crystal, the succinic anionylene molecules fixed inside the pores will not react with the lithium metal anode, which is beneficial for improving the battery's discharge specific capacity.

The embodiment of the invention provides a positive plate, a preparation method thereof and a secondary battery. The positive plate comprises a current collector, a first positive active layer and a second positive active layer which are sequentially stacked, wherein the first positive electrode active layer comprises a first positive electrode active material, a liquid ion plastic crystal electrolyte, a first conductive agent and a first binder, and the second positive electrode active layer comprises a second positive electrode active material, a solid ion plastic crystal electrolyte, a second conductive agent and a second binder. The liquid ion plastic crystal electrolyte with high ionic conductivity is used in the first positive electrode active layer, and the solid ion plastic crystal electrolyte with high electrochemical stability is used in the second positive electrode active layer, so that partition collaborative optimization of an ion transmission channel and interface stability is realized; and the problem of contact inactivation of the positive active material due to volume change in the charging and discharging process is further avoided, so that the rate capability and long cycle performance of the all-solid-state battery under low test pressure are ensured.

The application discloses a fluorinated polymer and application thereof in electrode protection layer and solid-state electrolyte, and belongs to the technical field of lithium metal secondary batteries. The fluorinated polymer is obtained by the reaction of acrylate functionalized polyethylene glycol, HFBA and an initiator. When the fluorinated polymer is used as a lithium metal negative electrode protection layer, a LiFePO4 / Li full battery protected by the polymer shows more excellent cycle performance than an unprotected full battery. The battery cycle performance is stable, the capacity retention rate is high, and the capacity attenuation speed is slow. When the fluorinated polymer is applied to a solid-state electrolyte, the polymer solid-state electrolyte can form a polymer network to wrap ion-conducting plastic crystals through in-situ reaction, effectively inhibits the growth of Li dendrites, and ensures the stability of the polymer electrolyte and the lithium negative electrode. Moreover, the solid-state electrolyte can be adapted to high-nickel ternary positive electrode materials, providing a train of thought for realizing stable, safe and high-energy-density batteries.

The invention discloses a conductive mica composite solid electrolyte, a preparation method thereof and an all-solid-state battery. The conductive mica composite solid electrolyte is formed by compounding mica powder, a polymer matrix, a lithium salt, an ionic liquid and a plastic crystal material, wherein the mica powder is subjected to interlayer modification and the interlayer spacing is enlarged. The modified mica powder constructs an efficient ion transmission channel in the electrolyte. The preparation method comprises the steps of mica modification, solution membrane casting and the like, and a magnetic field can be applied to induce mica orientation during membrane formation. The invention also provides a solid electrolyte membrane which is composed of the conductive mica composite solid electrolyte and has a mechanical property gradient structure. The all-solid-state battery containing the conductive mica composite solid electrolyte has the advantages of low interface impedance, high ionic conductivity, long cycle life, good safety performance and the like. The process is compatible with an existing battery production line, and a new material scheme is provided for development of high-performance all-solid-state batteries.

The application discloses a composite quantum dot temperature memory material with a wide temperature range pressure card effect and a preparation method and application thereof, and belongs to the technical field of temperature control materials. The composite quantum dot temperature memory material is a carbon quantum dot / pressure card plastic crystal material composite, has a crystal lattice structure capable of reversibly deforming when temperature changes, and the reversible deformation is that when the temperature rises, the crystal lattice expands to absorb external heat; and when the temperature decreases, the crystal lattice shrinks to release the stored heat. The material realizes precise temperature memory in the full temperature range of-80 DEG C to 300 DEG C through heat absorption and release cycles and relies on the pressure card effect, has a wide temperature range coverage, has no brittle fracture, decomposition or performance attenuation at an extreme temperature, the pressure card effect is stable, the temperature memory error is not more than ±1 DEG C, can be adapted to various different forming modes, and can well meet the use requirements of different application scenarios such as building ceramics, refrigeration plates, building wall surfaces, industrial equipment, automobile surfaces and temperature control parts.