15 results about "Plastic crystal" patented technology

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.

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.

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.

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 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.

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.

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.