645results about "Hybrid capacitor electrolytes" patented technology

A nanocomposite electrode and a supercapacitor device including said nanocomposite electrode. The nanocomposite electrode includes a mixture of at least one binding compound, at least one conductive additive, and at least one molybdenum doped carbon material coated onto a substrate. The supercapacitor device includes two nanocomposite electrodes disposed facing one another, wherein the substrate of each nanocomposite electrode is coated with the mixture on an inside facing surface and the outer surfaces of the nanocomposite electrodes are not coated with the mixture, and the inside facing surfaces are separated by at least one electrolyte.

The invention relates to the technical field of polymer photoelectric materials, in particular to a preparation method of a supramolecular gel electrolyte. The method comprises the following steps: esterifying tetraphenylethylene alcohol and methacryloyl chloride to form tetraphenylethylene methacrylate, and performing staged linear heating polymerization on the tetraphenylethylene methacrylate, 3-(methacrylamido) propyl dimethyl 3-thiopropyl ammonium oxide inner salt, acrylic acid, tetraphenylethylene methacrylate and 4-vinylpyridine under the action of ammonium persulfate to obtain a tetraphenylethylene copolymer. And finally, soaking in a lithium chloride aqueous solution to obtain the supramolecular hydrogel electrolyte. The hydrogel obtained by the invention has high mechanical strength and high ionic conductivity, and is suitable for energy storage devices such as flexible supercapacitors and the like.

The invention provides a design and application of a power type electrolyte of a double-electric-layer capacitor, and the electrolyte comprises an organic solvent, an electrolyte salt and an additive. Wherein the additive has a general formula structure as shown in Figure 1: the additive has a strong electronegativity part and a strong electropositivity part, a proper chain length is adjusted between the two parts, so that the whole molecular size of the additive can be matched with the micropore diameter of the activated carbon, adsorption and desorption are facilitated, bond breaking is easy, and when part of pseudocapacitance is contributed through oxidation bond breaking, the performance of the additive is improved. According to the present invention, the positive electrode and the negative electrode can be preferentially adsorbed to the positive electrode and the negative electrode so as to form the regulation and the low polarity and high density interface, such that the ion association of the salt ions at the double electrode layer is reduced, the reduction of the liquid phase transmission internal resistance is achieved, the excellent power performance is further represented, and the capacity retention rate in the 125A large-rate cycle (the conventional current is 25A) is increased to 90.1% from 76.3%. In addition, the silicon-containing part formed by broken bonds can also synergistically remove HF generated by hydrolysis of salt anions BF4 <-> in the electrolyte, passivate Al foil and reduce the contact internal resistance of the aluminum conducting bar. The configuration of the additive introduced into the electrolyte is shown in the specification.

The invention provides an anisotropic ion transmission supercapacitor based on topological insulator electrolyte. Relates to the technical field of energy storage devices, and comprises an electrolyte module, the electrolyte module comprises an electrolyte, the electrolyte is a network formed by Bi2Se3 nanowires, and the Bi2Se3 nanowires form an anisotropic ion transport channel through a surface modification method of sodium dodecyl benzene sulfonate and vertical orientation arrangement. According to the anisotropic ion transmission supercapacitor based on the topological insulator electrolyte, an electrolyte module with anisotropic ion transmission characteristics is formed by adopting a network formed by topological insulator electrolyte Bi2Se3 nanowires and a surface modification technology. The electrode performance of the electrode module is enhanced through a vertical heterojunction structure, laser reduction, plasma etching and other processes, and therefore the excellent performance of the solid-state supercapacitor in the aspects of high energy density, low-temperature stability and structural stability is achieved.

The invention relates to the technical field of electronic component manufacturing, solves the technical problem that interface contact resistance bounces and rises due to thermal stress mismatch, and particularly relates to an electronic component preparation parameter optimization method and system. Generating a gradient layer of which the thermal expansion coefficient continuously changes; and calculating a target thermal expansion coefficient for eliminating the interface thermal stress and an actual thermal expansion coefficient of the in-situ monitoring gradient layer based on the metal and ceramic concentration distribution function. According to the method, component continuous transition is achieved through metal / ceramic precursor dynamic flow control, continuous gradual change from metal to ceramic components is achieved, the coefficient of thermal expansion is in smooth transition in the thickness direction, and internal stress accumulation caused by material expansion difference is blocked from the source; and dynamic deposition regulation is combined to ensure that the thermal expansion gradient at any position is lower than a critical threshold value, and stripping or cracking caused by stress concentration in thermal circulation is avoided.

The invention provides a high-voltage-resistant electrolyte and a supercapacitor, the electrolyte comprises a mixed electrolyte salt, a mixed organic solvent and an additive, the additive is a mixed additive of a sulfur-containing additive and a functional additive, the functional additive containing cyano and nitrogen-rich pyrazine ring is introduced into the electrolyte, the functional additive can be oxidized preferentially at a positive electrode interface, and the positive electrode interface can be oxidized preferentially at a negative electrode interface. A stable and compact positive electrode electrolyte interface film (CEI) is constructed, and continuous decomposition of the electrolyte under high voltage is inhibited; and corrosive HF acid can be removed, transition metal ions are complexed, the catalytic chain reaction is cut off, and the structure degradation and capacity fading of the positive electrode material are relieved. By adopting the high-voltage-resistant electrolyte disclosed by the invention, the cycling stability and safety of the supercapacitor under high cut-off voltage can be remarkably improved, and the key technical problems of electrolyte decomposition, performance degradation of a positive electrode material and the like when the traditional electrolyte is applied at high voltage are effectively solved.

Disclosed are novel electrolytes, and techniques for making and devices using such electrolytes, which are based on compressed gas solvents. Unlike conventional electrolytes, disclosed electrolytes are based on “compressed gas solvents” mixed with various salts, referred to as “compressed gas electrolytes.” Various embodiments of a compressed gas solvent include a material that is in a gas phase and has a vapor pressure above an atmospheric pressure at room temperature. The disclosed compressed gas electrolytes can have wide electrochemical potential windows, high conductivity, low temperature capability and / or high pressure solvent properties. Examples of a class of compressed gases that can be used as solvent for electrolytes include hydrofluorocarbons, in particular fluoromethane, difluoromethane, tetrafluoroethane, and pentafluoroethane. Also disclosed are battery and supercapacitor structures that use compressed gas solvent-based electrolytes and techniques for constructing such energy storage devices. Techniques for electroplating difficult-to-deposit materials using compressed gas electrolytes as an electroplating bath are also disclosed.

The invention discloses a high-energy sodium ion hybrid capacitor, which is characterized in that an active material of a positive electrode is a sodium ion battery type positive electrode material, an active material of a negative electrode is a carbon material with a high specific surface area, and an electrolyte is an organic ether electrolyte containing sodium ions; and the mass ratio of the active material of the positive electrode to the active material of the negative electrode is (1: 1)-(2.5: 1). The working voltage of the high-energy sodium ion hybrid capacitor is up to 4.1 V, the high-energy sodium ion hybrid capacitor has high energy density, high power density and tens of thousands of cycle stability, pre-sodium treatment is not needed in device assembly, and large-scale preparation is easy.

To provide a composition for an electrolyte capable of suppressing gas generation during high-temperature storage, and to provide an electrochemical device, a secondary battery and a lithium ion secondary battery using the composition for the electrolyte.SOLUTION: The composition for an electrolytic solution contains a compound (A) represented by formula (A). (A) Rf1-O-CH2-CH2-O-R1 (wherein Rf1 is a fluoroalkyl group having 1 to 6 carbon atoms, and R1 is H, Li, Na, K or Cs); ) SELECTED DRAWING: None

According to the present invention, it is possible to provide a polycarbonate resin that contains a constituent unit (A) derived from a monomer represented by general formula (1), a constituent unit (B) derived from a monomer represented by general formula (2) and a constituent unit (C) derived from a monomer represented by general formula (3). Relative to the total amount of constituent units (A), (B) and (C) that constitute the polycarbonate resin, the proportion of constituent unit (A) is 20-50 mol %, the proportion of constituent unit (B) is 5-20 mol %, and the proportion of constituent unit (C) is 30-75 mol %.

A current collector 100 according to the present disclosure includes: a substrate 101; and a coating layer 102 coating the substrate 101, wherein the coating layer 102 includes conductive carbon 103 and a first binder 104, the first binder 104 includes an aromatic super engineering plastic, and a moisture content calculated based on moisture generated from the current collector 100 when heated to 200°C is 200 mass ppm or less.

The present invention relates to electrochemical devices and electronic devices. Specifically, the present invention provides an electrochemical device comprising a cell, the cell comprising a positive electrode, a negative electrode, an electrolyte, and a separator, the outermost electrode of the cell having a curved portion and a straight portion, the straight portion having a length L mm and a radius D mm, where L / D is 5≦L≦10, the electrolyte containing propylene carbonate, and the propylene carbonate content A % based on the mass of the electrolyte, where A % is 5≦A≦15. The electrochemical device of the present invention has significantly improved room temperature cycle performance.

A solid electrolyte according to one aspect of the present invention contains a lithium element, a phosphorus element, a silicon element, a sulfur element, and a halogen element, in which the molar ratio (Si / (P+Si)) of the content of the silicon element to the total content of the phosphorus element and the silicon element is 0.04-0.55 inclusive, the molar ratio (S / (P+Si)) of the content of the sulfur element to the total content of the phosphorus element and the silicon element is 3.50-4.10 inclusive, the halogen element contains at least one of a bromine element and an iodine element, and the molar ratio ((Br+I) / X) of the total content of the bromine element and the iodine element to the content of the halogen element is 0.80 or more, and the solid electrolyte has a predetermined crystal structure.

To provide an electrolyte composition with excellent ionic conductivity. [Solution] An electrolyte composition comprising an ion-conducting inorganic solid electrolyte, a polymer having the ability to preferentially conduct metal ions, and an ionic liquid.

An electrolyte membrane containing fine cellulose fibers, polyvinyl alcohol, and a crosslinking agent.

Provided are an electrolyte powder, a sheet, an electrochemical element, and an electric power storage device which can facilitate quality control. The electrolyte powder has a garnet-type crystalline structure containing Li, Zr, and La, and satisfies b*≥2 in chromatic coordinates of CIE 1976 L*a*b* color space. The electrolyte powder optionally satisfies a*≥0, and the chroma represented by c*={(a*)2+(b*)2}1 / 2 optionally satisfies 2≤c*≤10. The sheet, the electrochemical element, and the electric power storage device each include the electrolyte powder.

A secondary cell is provided. The secondary cell comprises a solid electrolyte to conduct oxygen ions, a positive electrode configured to be in contact with the solid electrolyte, and a negative electrode configured to be in contact with the solid electrolyte. The positive and the negative electrode comprise a mixed ionic and electronic structure for conducting oxygen ions and electrons. The mixed ionic and electronic structure comprises an ABO3 structure, wherein the A site corresponds to a first chemical element with a first covalent radius, wherein the B site corresponds to a second chemical element with a second covalent radius; and / or a CeMO2 structure, wherein the Ce is Cerium and M is a metal.

The invention provides a high-voltage gel polymer electrolyte, a preparation method thereof and a supercapacitor, and belongs to the technical field of supercapacitors. The preparation method comprises the following steps: adding a citric acid aqueous solution into polysaccharide powder, stirring to obtain a polysaccharide solution, adding nanocellulose whiskers into the polysaccharide solution, and performing ultrasonic treatment to form a modified polysaccharide composite solution; the preparation method comprises the following steps: stirring a fluorinated monomer and a cross-linking agent to form a mixed system, adding a photoinitiator into the mixed system, and stirring until the initiator is completely dissolved to obtain a monomer-cross-linking agent mixed solution; mixing and stirring the modified polysaccharide composite solution and the monomer-cross-linking agent mixed solution to form a composite precursor solution; soaking a substrate in a hydroxysilane ethanol solution for surface modification, uniformly coating the surface of the substrate with the composite precursor solution, performing cross-linking polymerization reaction through ultraviolet radiation to obtain a gel film, drying the gel film, soaking the dried gel film in an electrolyte, and extruding to obtain the high-pressure gel polymer electrolyte.

Provided is a method for manufacturing a power storage device with which it is possible to improve high-temperature characteristics. This method for manufacturing a power storage device provided with a positive electrode, a negative electrode, and an electrolyte solution includes a step for filling at least a space between the positive electrode and the negative electrode with the electrolyte solution, and a step for performing a heat treatment on the electrolyte solution, and the electrolyte solution contains a solvent, an electrolyte salt having a fluorine atom, and a silyl compound having at least one silyl group.

To provide a slurry composition for manufacturing a high-performance solid-state battery, which is capable of suppressing the gelation of a slurry even when the slurry composition contains an inorganic powder containing an alkali metal, and is also excellent in sinterability.SOLUTION: A slurry composition for manufacturing a solid-state battery includes an organic solvent, and an inorganic powder containing binder resin and alkali metal, and the organic solvent is at least one selected from the group consisting of aromatic compounds, aliphatic hydrocarbons and alicyclic hydrocarbons, and the binder resin is at least one selected from the group consisting of polystyrene resins and polypropylene resins.SELECTED DRAWING: None

The invention discloses an electrolyte containing a pyridyl compound as well as a preparation method and application of the electrolyte. The invention provides an electrolyte containing a pyridyl compound, which is prepared from the following components in percentage by mass: 15 to 25 percent of lithium salt, 2 to 4 percent of 3-bromo-5-fluoropyridylaldehyde, 0.5 to 1 percent of sulfur additive, 0.2 to 0.5 percent of carbonic ester additive, 0.5 to 1 percent of lithium salt additive and the balance of organic solvent. In the electrolyte provided by the invention, the 3-bromine-5-fluoropyridylaldehyde can form a stable interfacial film, and electrolyte decomposition and metal ion dissolution are inhibited; the bromine and fluorine electricity absorption groups can improve the stability of an electrode / electrolyte interface and assist uniform deposition of lithium; and acid can be removed, high-temperature gas production can be reduced, and battery circulation and storage performance can be enhanced.

This application provides an electrochemical device and an electronic device. The electrochemical device includes a positive electrode, a negative electrode, and an electrolyte; where the positive electrode includes a positive electrode active material layer, the positive electrode active material layer includes a positive electrode active material, and the positive electrode active material includes a first positive electrode active material and a second positive electrode active material; after the electrochemical device is fully discharged, a Raman spectrum of the positive electrode active material layer has a first characteristic peak at a wavelength ranging from 398 cm-1 to 408 cm-1 and a second characteristic peak at a wavelength ranging from 940 cm-1 to 960 cm-1; and the second positive electrode active material includes element aluminum. The electrochemical device provided in this application has both high energy density and good high-temperature cycling performance.

The invention relates to the technical field of energy storage materials, and discloses a supercapacitor and a preparation method and application thereof. The supercapacitor comprises a first electrode, a second electrode, a current collector and an electrolyte, the first electrode comprises a TiVC MXene film, and the electrolyte is an acidic electrolyte. In the prior art, research on MXenes for a supercapacitor is highly focused on Ti3C2, and exploration on other types of MXenes, especially key performance indexes (such as rate capability) of the MXenes is seriously insufficient. According to the invention, the huge potential of the double transition metal TiVC MXene as a high-performance supercapacitor electrode material is systematically proposed and verified for the first time, and the research system and the application range of the MXene material in the field of electrochemical energy storage are greatly enriched and expanded.

A technique that can improve ionic conductivity is provided.An electrolyte includes an inorganic composite particle that is a composite of an inorganic particle with a compound having a betaine structure and one or more functional groups selected from a (meth)acryloxy group, a Si(OR)3 group (R is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms), and an Al(OR)2 group (R is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms).

A non-aqueous electrolyte solution for a secondary battery, containing a first compound represented by the following Formula (1), a second compound represented by the following Formula (2), a non-aqueous solvent, and an electrolyte.

The present invention relates to a process for the production of hydrogen bis(chlorosulfonyl)imide (HCSI), said process comprising the following steps: (i) providing to a reactor a composition (H) comprising an amount (CSI-1) of chlorosulfonyl isocyanate, an amount (CSA-1) of chlorosulfonic acid, and at most 20% by weight, based on the total weight of the composition (H), of an amount (HCSI-1) of HCSI; and (ii) heating said composition (H). The present invention also relates to a method for recycling a composition (H) as defined above, said method comprising feeding said composition (H) to a reactor and heating said composition (H) at a temperature below 150°C.

The invention discloses a super capacitor electrolyte and a super capacitor, and relates to the technical field of super capacitors, the super capacitor electrolyte comprises an electrolyte, a solvent and a functional additive; the electrolyte comprises spiro quaternary ammonium tetrafluoroborate and triethyl methyl ammonium tetrafluoroborate; the solvent comprises acetonitrile and sulfolane; the functional additive is a compound with a crown ether structure prepared through a thiol-ene click reaction; the addition amount of the functional additive is 1-10% of that of the solvent. The supercapacitor electrolyte system can resist high voltage and has wide temperature adaptability, that is, the supercapacitor electrolyte system has good high temperature resistance and low temperature resistance, so that the application requirement of a supercapacitor in a complex and severe environment is met.

A nonaqueous electrolyte energy storage device according to one aspect of the present invention includes: a negative electrode including a negative active material layer; and a nonaqueous electrolyte containing an unsaturated cyclic carbonate and a P—O bond-containing fluorophosphate, in which the negative active material layer has a BET specific surface area of 0.80 m2 / g or more and 1.5 m2 / g or less, and the ratio of the content of the unsaturated cyclic carbonate to the total content of the unsaturated cyclic carbonate and the P—O bond-containing fluorophosphate is 0.60 or more and less than 1.0 on a mole basis.