2042results about "Hybrid capacitor electrolytes" patented technology

The invention relates to the technical field of supercapacitors, and provides a cement-based supercapacitor, a preparation method and application. The cement-based supercapacitor comprises a cement-based electrolyte and two structural electrodes arranged on the two sides of the cement-based electrolyte. The cement-based electrolyte is prepared from cement, alkali, alkali metal salt, water and an additive, wherein the alkali metal salt comprises lithium salt; each structural electrode is composed of foamed nickel loaded with nitrogen-doped reduced graphene oxide. The lithium salt is added to construct an efficient ionic conductive network, so that the ionic conductivity of the cement-based electrolyte is enhanced, and the electrochemical performance is obviously improved. The reduced graphene oxide in the structural electrode is doped with nitrogen to enhance the electrostatic force between ions and the surface of the electrode, so that the electrochemical stability of the surface of the electrode is improved, and self-discharge is effectively inhibited. By improving an electrolyte and a structural electrode material, a cement-based supercapacitor with specific capacitance and mechanical properties is obtained and is combined with a building structure to realize building energy storage.

A supercapacitor including a gel electrolyte and two electrodes having a substrate, date stone activated carbon, a conductive carbon compound different from the date stone activated carbon, and a binding compound. A mixture of the date stone activated carbon, the conductive carbon compound, and the binding compound partially coats a surface of the substrate. The two electrodes are assembled in a symmetrical layered configuration with the surfaces coated with the mixture facing each other. The gel electrolyte is present between the surfaces coated with the mixture to form the supercapacitor. The gel electrolyte is a mixture of H2SO4, polyvinyl alcohol, and anthraquinone. Particles of the date stone activated carbon have a nanosheet morphology, and the nanosheets are stacked on top of each other to form a hierarchical structure.

The invention discloses a cement-based structure supercapacitor and a wall energy storage system, and relates to the technical field of energy storage. Wherein the cement-based structure super capacitor comprises a capacitor positive electrode, a capacitor negative electrode and a cement-based solid electrolyte; the capacitor positive electrode and the capacitor negative electrode are made of carbon nanomaterials; the cement-based solid electrolyte comprises cement, a conductive additive and a transition metal oxide; the cement-based solid electrolyte is arranged between the capacitor positive electrode and the capacitor negative electrode. According to the technical scheme, the energy storage performance of the super capacitor with the cement-based structure can be improved.

The present invention relates to a gel polymer electrolyte membrane and a preparation method therefor, and a secondary battery. The gel polymer electrolyte membrane comprises an ionic liquid and a polyionic liquid obtained by polymerizing the ionic liquid. Further provided is a gel polymer electrolyte membrane having both a high ionic conductivity and high mechanical properties.

The invention provides a secondary battery and electronic equipment, the secondary battery comprises a negative electrode plate and an electrolyte, the negative electrode plate comprises a negative electrode active material layer, the negative electrode active material layer comprises graphite and a silicon carbon material, and the average sphericity of the silicon carbon material is 0.81-0.95; the electrolyte comprises ethylene carbonate, propylene carbonate, ethyl propionate and propyl propionate, based on the mass of the electrolyte, the mass percentage content of ethylene carbonate is a%, the mass percentage content of propylene carbonate is b%, the mass percentage content of ethyl propionate is c%, the mass percentage content of propyl propionate is d%, and the range of (a + b) / (c + d) is 0.23-1.51. According to the invention, the discharge performance and the safety performance of the secondary battery at low temperature can be improved.

Disclosed herein are halide-based solid electrolytes with high ionic conductivity for all-solid-state sodium ion batteries. For example, disclosed herein are solid electrolytes comprising: ABCλ-2x-zDx+y, wherein: A is chosen from Li, Na, K, Mg, Ca, Zn, Al, In, Fe, and combinations thereof; B is chosen from Ca, Mg, Zn, In, V, Nb, Ta, Mn, Ti, Zr, Hf, Fe, Co, Ni, Al, Ga, and combinations thereof; C is chosen from F, Cl, Br, I, and combinations thereof; D is chosen from O, S, Se, Te, and combinations thereof; λ is an integer chosen from 4, 5, and 6, such that the solid electrolyte is charge neutral; 0 < x < 1; 0 < z < 2; and 0 < y < 1.

The invention discloses an electrolyte, an electrochemical device comprising the electrolyte and a vehicle. The electrolyte comprises a solvent, a first additive and a second additive, the solvent comprises chain carboxylic ester, and the first additive comprises a sulfonate compound or / and a sulfate compound; the second additive comprises vinylene carbonate or / and fluoroethylene carbonate. According to the electrolyte disclosed by the invention, the chain carboxylic ester solvent, the first additive containing the sulfonate compound or / and the sulfate compound and the second additive containing the vinylene carbonate or / and the fluoroethylene carbonate are matched for use; the rapid charging capability and the high-temperature cycle performance of a lithium iron phosphate system battery with high safety performance can be improved, and the application of lithium iron phosphate in a power battery is further widened.

A supercapacitor including a negative electrode, a positive electrode, an electrolyte, and a separator. The separator is between the negative electrode and the positive electrode, and the electrolyte is present in and on the separator. The negative electrode and the positive electrode include a carbon material selected from a poly-anthraquinone sulfide activated carbon material and a poly-anthraquinone sulfide reduced activated carbon material.

The present invention relates to a flexible iron aluminate cement-based supercapacitor and a preparation method thereof. The flexible iron aluminate cement-based supercapacitor is assembled with rGO / Ni as the positive electrode, rGO@α-Fe2O3 spindle / Ni as the negative electrode, and polyacrylamide-cement-emulsion-latex powder-water-KOH as the flexible cement-based solid electrolyte. Compared with the prior art, the flexible energy storage cement-based material, as a new type of building material integrating structure / function, realizes the integration of flexible lightweight design and functional technology. Its flexible characteristics can closely fit complex-shaped buildings and have good adaptability to special-shaped curved building structures. At the same time, a non-destructive construction process can also be adopted, and the energy storage function can be imparted to the existing structure by an external pasting method, so that the energy storage function can be imparted without structural reconstruction.

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 application provides a cement-based zinc ion hybrid capacitor, a preparation method thereof and application of the capacitor in an energy storage device. The cement-based zinc ion hybrid capacitor comprises an active carbon positive electrode, a zinc foil negative electrode and a composite air-entraining mortar interlayer arranged between the two electrodes. The active carbon positive electrode is active carbon loaded on a carrier with good conductivity, and the carrier is any one of carbon-based materials such as carbon felt, carbon fiber and graphite plate or any one of foils, meshes and foams of metals such as stainless steel, copper, titanium and nickel and alloys thereof. The composite air-entraining mortar interlayer between the two electrodes is immersed in an electrolyte under negative pressure. The composite air-entraining mortar has interconnected pores, and ions are transmitted through the electrolyte in the pores and participate in electrode reactions. The application mainly provides a porous cement-based solid electrolyte based on a composite air-entraining technology and a structural electrochemical energy storage device, and the structural energy storage device can simultaneously have good energy storage characteristics and mechanical properties.

The invention discloses a strain sensor based on multifunctional hydrogel, a flexible supercapacitor and a preparation method and application of the strain sensor and the flexible supercapacitor, and belongs to the technical field of flexible wearable sensors. By regulating and controlling the contents of BC, TA and LiCl, the mechanical property of the hydrogel is remarkably improved, and the balance of elongation at break and tensile strength is realized. Due to the introduction of TA, the hydrogel is endowed with excellent adhesion performance, and adjustable adhesion strength can be realized by regulating and controlling the content of TA. In addition, the hydrogel is endowed with excellent anti-freezing and water-retaining properties by LiCl. The hydrogel strain sensor has the advantages of high sensitivity, high response speed and the like.

The invention provides a full-cement-based supercapacitor and a preparation method thereof, and relates to the technical field of supercapacitors. The full-cement-based super capacitor comprises a first cement-based electrode, a second cement-based electrode, and a foaming cement isolation layer between the first cement-based electrode and the second cement-based electrode. The invention constructs a full-cement type super capacitor with a cement-based electrode and a cement-based diaphragm, and the capacitor is low in cost, has relatively high structural stability, excellent physical performance, high assembly efficiency and good durability, and is expected to be applied to actual engineering.

The invention relates to the technical field of supercapacitors, in particular to an alkali-activated solid-waste-based supercapacitor and a preparation method thereof.The preparation method comprises the steps that industrial solid waste and fiber forestry and agricultural residues are subjected to co-pyrolysis to form organic-inorganic composite solid waste gelling powder, an alkali activator and a functional additive are added to prepare alkali-activated slurry, and the alkali-activated slurry is prepared; pouring, molding and curing to obtain an alkali-activated solid waste-based electrolyte substrate; the method comprises the following steps: performing high-temperature pyrolysis, activation and the like on granular agricultural and forestry wastes to prepare a carbon-based composite conductive material, and preparing a biochar electrode plate; the preparation method comprises the following steps: taking PVDF as a raw material, bonding and curing the PVDF and the raw material, immersing the PVDF and the raw material into a KOH solution containing a PVA thickener, inserting a glass fiber diaphragm, and regulating and controlling the use amount of PVDF and other binders and a solvent system to optimize slurry viscosity and film forming uniformity so as to obtain an electrode film with mechanical flexibility and interface adhesive force; the composite electrode forms a stable composite interface in the process of being in contact with an alkali-activated electrolyte interface, and the phenomena of interface aging and capacitance attenuation caused by mismatching between the electrode and the electrolyte in a traditional cement-based system are effectively avoided.

Provided are: a crystalline sulfide solid electrolyte, which has an improved ionic conductivity while adopting a liquid phase method, contains predetermined atoms, has a diffraction peak in X-ray diffractometry using a predetermined CuKα ray, and has a thio-LISICON Region II-type crystal structure as a basic structure; and a method for producing a crystalline sulfide solid electrolyte, the method including mixing using predetermined complexing agents and an instant drying step.

A heating circuit for an energy storage device having a core with an electrolyte, inputs, a capacitance across the electrolyte and the core, and internal surface capacitance between inputs which can store electric field energy between internal electrodes of the energy storage device that are coupled to the inputs, including: a power supply coupled to an input, the power supply provides positive and negative input currents to one input, the positive input current flows in to the input and the negative input current flows out of another input; and a controller that switches between the positive and negative input currents to provide the positive input current and the negative input current to the one of the inputs at a frequency sufficient to effectively short the internal surface capacitance of the energy storage device to generate heat and raise a temperature of the electrolyte.

The invention provides a carbon mineralization structure supercapacitor and a preparation method and application thereof. The supercapacitor with the carbon mineralization structure comprises an electrode, the electrode comprises a carbon mineralization gel material, a carbon conductive material and foam metal, and the carbon conductive material is distributed in a three-dimensional space formed after the carbon mineralization gel material is carbonized and wraps the foam metal together; the electrodes are arranged on the two sides of the solid electrolyte layer, and the preparation raw materials of the solid electrolyte layer comprise a carbon mineralization cementing material, bicarbonate, a fiber material, a porous micro-nano material, an air entraining agent and an inorganic salt aqueous solution, raw materials for preparing the solid electrolyte layer are mixed, pressed and carbonized to form the solid electrolyte layer. The carbon mineralization structure supercapacitor provided by the invention breaks through the bottlenecks of low strength and poor energy storage performance of a traditional cement-based capacitor, has excellent mechanical properties and electrical properties at the same time, and is low in cost and environment-friendly.

The present invention relates to a positive electrode for an all-solid-state battery and an all-solid-state battery comprising same. More specifically, in the present invention, the positive electrode active material layer includes a positive electrode active material, a sulfide-based solid electrolyte, a conductive material, and a porous carbon additive. By allowing the particle diameter of the porous carbon additive to be included between the particle diameter of the positive electrode active material and the particle diameter of the sulfide-based solid electrolyte, the interface between the positive electrode active material and the sulfide-based solid electrolyte can be increased and at the same time the porosity of the entire positive electrode can be reduced, thereby exhibiting the effect of increasing the energy density of a cell without decreasing the cell performance while maintaining the conductivity of a bipolar electrode.

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.

Disclosed is an additive for a non-aqueous electrolyte solution, which contains a cyclic sulfone compound represented by formula (1). X1 represents a sulfonyl group or a carbonyl group, and Z represents a monovalent group represented by formula (21), (22), (23) or (24). # imgabs0 #

The present invention proposes an aqueous electrolyte and an energy storage device, which relates to the technical field of basic electrical components. The aqueous electrolyte includes water, a hydrogen bond donor and a hydrogen bond acceptor, and an electrolyte salt; the hydrogen bond donor and the hydrogen bond acceptor form a eutectic, and the eutectic is used to lock water. In the technical solution of the present invention, by using the hydrogen bond donor and the hydrogen bond acceptor to form a eutectic, water, the hydrogen bond donor and the hydrogen bond can be combined through the action of hydrogen bonds to form a hydrogen bond network, and water molecules can be fixed in the hydrogen bond network, thereby locking water, reducing the evaporation of water in the aqueous electrolyte, and realizing that the aqueous electrolyte can still work normally in the case of very little water; and in the case of low water content, the occurrence of hydrogen evolution can be reduced, thereby increasing the working voltage window of the electrolyte.

The invention relates to a super-flexible supercapacitor with a multi-layer seamless interlocking interface and a preparation method of the super-flexible supercapacitor. The super-flexible supercapacitor takes a carbon nanotube or a composite film thereof as an electrode; and polyanion gel (polyacrylamide / polyacrylic acid / poly (3-sulfonic acid propyl methyl acrylic acid potassium salt) and polycation gel (polyacrylamide / polyacrylic acid / poly (methacryloyloxyethyl trimethyl ammonium chloride) are used as the double-layer heterogeneous electrolyte. A covalent connection electrode / electrolyte interface is constructed through anchoring interface polymerization, and double-layer gel electrolyte with electrostatic attraction and mutual entanglement is constructed through in-situ polymerization, so that the super-flexible supercapacitor with a multi-layer seamless interlocking interface is realized. Compared with the prior art, the super capacitor has super-strong interface toughness and interface adhesion, can resist mechanical deformation including bending, folding, twisting, winding, extruding, knotting and the like, the capacity retention ratio is greater than 95% after the super capacitor is folded for hundreds of thousands of times, and the capacity retention ratio is greater than 89% after the super capacitor is circularly charged and discharged for hundreds of thousands of times.

An electrode including a substrate, a binding compound, date seed mesoporous carbon, and a conductive carbon (CC) other than the date seed mesoporous carbon. The date seed mesoporous carbon has a surface area of 600-800 m2 / g, an average pore size of 1-5 nm, and a sheet morphology. A mixture of the binding compound, the date seed mesoporous carbon, and the conductive carbon other than the date seed mesoporous carbon is coated on the surface of the substrate.

Electrolyte compositions for sodium-based batteries and methods of forming the same are described. The electrolyte compositions include at least one sodium borate ester salt and a solvent. In some embodiments, the sodium borate ester is tetra(phenol)borate (NaB[OC6H5]4) or sodium tetra(isopropyl)borate (NaB[OC3H7]4), and the solvent is an ether-based solvent.

The invention belongs to the technical field of supercapacitors, and particularly relates to a preparation method of a cement-based supercapacitor based on static pressure forming. By applying uniform static pressure, the physical compaction and optimization of the high-carbon-content slurry are realized, and the conductive network connectivity and pore structure optimization of the carbon cement matrix electrode are ensured. The final electrode material shows excellent energy storage performance and mechanical strength, and the capacitive performance and the mechanical performance are both considered. After the electrode is treated by the method, when the forming pressure is 4 MPa, the area specific capacitance can reach 817.3 mF / cm < 2 >, and the mechanical strength of the electrode after being cured for 28 days is 12.7 MPa. Compared with a traditional process, the electrochemical performance and the mechanical performance of the cement-based supercapacitor are remarkably balanced, and the actual application requirement of building-energy storage function integration is met.

The invention discloses an ionic liquid-based electrolyte, a wide-temperature-range high-voltage supercapacitor and application of the wide-temperature-range high-voltage supercapacitor. The wide-temperature-range high-voltage supercapacitor comprises a eutectic ionic liquid system and an organic solvent, the eutectic ionic liquid system comprises at least two ionic liquids; the ionic liquid comprises cations and anions; the positive ions are selected from at least one of pyrrolidinyl positive ions, piperidinyl positive ions, imidazolyl positive ions and quaternary ammonium positive ions containing different side chains; the anion is selected from at least one of tetrafluoroborate, hexafluorophosphate, bis (trifluoromethylsulfonyl imine), bis (fluorosulfonyl imine) and tetracyanoborate; the organic solvent comprises at least one of fluorinated carbonic ester, fluorinated carboxylic ester, sulfones, ethers and nitriles. The supercapacitor based on the ionic liquid-based electrolyte can stably operate in a wide temperature range, so that the wide-temperature-range high-voltage supercapacitor can be suitable for an extreme working environment, and high energy density and power density are achieved.

The invention relates to a flexible aluminoferrite cement-based supercapacitor and a preparation method thereof. The flexible aluminoferrite cement-based supercapacitor is assembled by taking rGO / Ni as a positive electrode, taking rGO (at) alpha-Fe2O3 spindle body / Ni as a negative electrode, and taking polyacrylamide-cement-emulsion-latex powder-water-KOH as a flexible cement-based solid electrolyte. Compared with the prior art, the flexible energy storage cement-based material serves as a novel structure / function integrated building material, integration of flexible lightweight design and functional technology is achieved, the flexible energy storage cement-based material can be tightly attached to a building with a complex shape due to the flexible characteristic, and the flexible energy storage cement-based material has good adaptability to a special-shaped curved surface building structure; and meanwhile, a non-destructive construction technology can be adopted, the energy storage function is given to the existing structure in an external pasting mode, and the energy storage function can be given without structural reconstruction.

The invention provides a conductive carbon material for a cement-based electrode, a preparation method of the conductive carbon material, the cement-based electrode and a supercapacitor, and relates to the technical field of supercapacitors. The carbon black material with specific pore size distribution is prepared through the chlorination reaction, the specific surface area loss is reduced through surface modification, and the network connectivity of the carbon black is further improved. And the organic electrolyte is used, so that the voltage window is greatly improved, and the capacitance is qualitatively leap.

A glass fiber-based structural composite offers an alternative or supplement to carbon fibers in areas such as battery storage. Through electroless deposition of conductive materials like copper and nickel, the glass fiber surface is made conducting and functions as a good current collector. By using anode and cathode materials like manganese (II, III) oxide and Zinc, cathode and anode mats on the copper- and nickel-coated glass fibers are created via hydrothermal and electro-deposition methods. In one example application, the anode and cathode mats are in an alternate square patterned arrangement using copper and nickel-coated glass fiber as a current collector. The device, with a capacity of >300 mAh / g at 0.1 A / g is assembled using an alternate system of epoxy and electrolyte. Uncoated pristine glass fiber ladened and patterned with electrolyte are used as a separator. Uncoated pristine glass fiber ladened with epoxy can be used as an insulator between two devices.

Electrolyte compositions comprising one or more ion conducting salt(s) and one or more ammonium salt(s), such as, for example, asymmetric ammonium salt(s) or the like, which may, independently, be a quaternary ammonium salt. In various examples, the ammonium salt(s) independently comprise cations(s) chosen from primary ammonium cations, secondary ammonium cations, tertiary ammonium cations, quaternary ammonium cations, and the like, and any combination thereof. In various examples, an electrolyte composition further comprises one or more additional salt(s), which may, independently, be an ion-conducting salt. In various examples, an anode comprising an SEI layer is formed by contacting an anode, such as, for example, a metal anode or the like, with one or more electrolyte composition(s). In various examples, an electrochemical device, such as, for example, a battery, a supercapacitor, a fuel cell, an electrolyzer, an electrolytic cell, or the like comprises one or more composition(s) and / or one or more anode(s).