56results about "Double layer capacitors" patented technology

The application provides a biomass-based composite electrode material, an electrode sheet and a hybrid supercapacitor, and belongs to the technical field of electrochemical energy storage. 3 The biomass-based composite electrode material comprises: a biomass-derived porous carbon matrix, pores with multiple pore sizes, the volume of the pores is 0.7-1.7 cm 2 / g; and nickel-cobalt layered double hydroxide nanosheets vertically anchored on the surface of the biomass-derived porous carbon matrix; the specific surface area of the composite electrode material is 900-1400 m 2 / g. The biomass-based composite electrode material of the application significantly improves the ion adsorption and charge storage capacity. In addition, the electrode material is applied in a capacitor, which effectively improves the energy density, electrode conductivity and cycle stability of the supercapacitor.

To provide a secondary battery in which a short circuit in a gap between a cathode plate and an anode with a separator interposed therebetween can be prevented and a decrease in impregnation properties of an electrolytic solution into a wound electrode body can be suppressed.SOLUTION: A secondary battery according to an embodiment includes: a wound electrode body in which a cathode plate where a cathode active material layer is formed except for cathode current collector foil exposed portions extending along one long side of a band-shaped cathode current collector foil and an anode plate where an anode active material layer 41 is formed except for anode current collector foil exposed portions extending along one long side of a band-shaped anode current collector foil are wound around via a band-shaped separator; a battery case that houses the wound electrode body and an electrolytic solution; a cathode current collector terminal that is electrically connected to a cathode current collector foil portion where the cathode current collector foil exposed portions are collected; an anode current collector terminal electrically connected to an anode current collector foil portion where the anode current collector foil exposed portions are collected; and insulating layers formed in at least one of a region of the cathode current collector foil exposed portions except for the cathode current collector foil portion and a region of the anode current collector foil exposed portions except for the anode current collector foil portion.SELECTED DRAWING: Figure 1

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 disclosure provides a nonaqueous lithium power storage element in which the positive electrode active substance layer contains lithium iron phosphate and a carbon material containing activated carbon as the positive electrode active substance. When the content of carbon material in the positive electrode active substance layer is X1 (mass%) and the lithium iron phosphate content is X2 (mass%), the lithium iron phosphate mass ratio (X2 / (X1+X2)) is 0.40 to 0.85. The total pore volume of the positive electrode active substance layer is 0.29 cc / g to 0.70 cc / g, the void diameter D25 of the positive electrode active substance layer is 0.34 µm to 0.64 µm, the void diameter D75 of the positive electrode active substance layer is 0.10 µm to 0.20 µm, and the difference between the void diameter D25 and the void diameter D75 (D25-D75) is 0.20 µm to 0.45 µm.

The application belongs to the technical field of zinc-based energy storage devices, and particularly relates to a composite gel layer modified zinc metal electrode, a preparation method thereof and application thereof in zinc-based energy storage devices. Acrylamide, sodium alginate, water, N,N-methylene bisacrylamide and ammonium persulfate are mixed to obtain a mixture; the mixture is applied to the surface of a zinc metal material, and then heat treatment is performed to initiate a polymerization reaction of acrylamide, thereby obtaining an electrode semi-product; a zinc metal salt solution is applied to the surface of the semi-product to initiate a polymerization reaction of sodium alginate, thereby obtaining the composite gel layer modified zinc metal electrode. The composite gel layer modified zinc metal electrode provided by the application exhibits higher cycle stability and a longer service life when applied to aqueous zinc ion hybrid capacitors, zinc ion batteries, gel-state zinc ion capacitors and gel-state zinc ion hybrid capacitors and other energy storage devices.

This invention relates to a lithium-ion capacitor based on charge injection to regulate the zero-voltage potential and its preparation method. The preparation method includes the following steps: S1, preparing a cathode electrode and an anode electrode; S2, performing electrochemical charge injection pretreatment on the cathode and anode electrodes to regulate the zero-voltage potential of the lithium-ion capacitor to the target zero-voltage potential; S3, assembling a separator, electrolyte, and the cathode and anode electrodes to obtain the lithium-ion capacitor. Compared with the prior art, this invention actively regulates the zero-voltage potential of the positive and negative electrodes through electrochemical charge injection to optimize the potential matching and capacity balance between the anode and cathode. This method can effectively broaden the operating voltage range of the device, suppress side reactions during charging and discharging, and promote the kinetic coordination of the anode and cathode, thereby significantly improving the energy density of the lithium-ion capacitor while maintaining high power density.

The application provides a metal organic polyhedral cross-linked gel electrolyte and a preparation method and application thereof, and belongs to the technical field of secondary batteries and polymer electrolytes.The metal organic polyhedral cross-linked gel electrolyte is composed of a chemical cross-linked network, a zinc salt and a solvent; the chemical cross-linked network is constructed by a first polymer and a metal organic polyhedron through coordination bonding; and the metal organic polyhedral cross-linked gel electrolyte further comprises a second polymer interpenetrating in the chemical cross-linked network to form a semi-interpenetrating network structure.The cross-linked network structure of the gel electrolyte is stable and uniform, and structural defects of a traditional MOPs-based electrolyte are completely avoided; mechanical properties and toughness are synergistically improved, zinc negative electrode dendrite growth is effectively inhibited; low-temperature electrochemical performance is excellent, and application limitations of zinc-based batteries under extreme working conditions are broken through; an electrochemical cycle life is super-long, and excellent long-term service stability is exhibited; and dual-function characteristics are combined, and the preparation efficiency and use safety of zinc-based batteries are improved.

The application discloses a kind of graphene negative electrode structure containing topological defects and its preparation method and application, including containing topological defects graphene material;The graphene material is the main body of negative electrode active material or its surface coating, and the topological defect is Stone-Wales defect formed by adjacent five-membered carbon ring and seven-membered carbon ring in the lattice of graphene material.The application can guide lithium uniform deposition, inhibit dendrite growth, and the defect graphene negative electrode of the application has strong adsorption and activation effect on lithium ions at lattice defects, and can be used as nucleation site for lithium preferential deposition.

To provide a power storage element capable of suppressing the dissolution of fine copper powder even when the fine copper powder is mixed between a positive electrode and a negative electrode.SOLUTION: A power storage element includes a positive electrode 11 having a conductive positive electrode base material 13, a positive electrode active material layer 14, and an insulating layer 15, a negative electrode 12 that is arranged so as to face the positive electrode and having a conductive negative electrode base material 16 and a negative electrode active material layer 17, and a separator 18 arranged between the positive electrode and the negative electrode, and in a region in which the positive electrode faces the negative electrode, the insulating layer covers a laminated structure including the positive electrode base material and the positive electrode active material layer, and the potential of the surface of the insulating layer is lower than 3.4 V vs. Li / Li+.SELECTED DRAWING: Figure 1

One embodiment of the present invention, in order to achieve the described technical objective, may provide an energy storage system manufacturing method comprising the steps of: receiving, in a pouch, a lithium electrode assembly comprising a lithium electrode terminal protruding to a first side of the pouch, a negative electrode assembly comprising a negative electrode terminal, a positive electrode assembly comprising a positive electrode terminal, and an electrolyte; doping the negative electrode assembly with lithium by electrically connecting the lithium electrode terminal and the negative electrode terminal; extracting the lithium electrode assembly from the pouch by cutting the pouch along a cut line which is formed so as to be spaced apart from the first side of the pouch at a predetermined interval; and sealing the cut surface of the pouch cut along the cut line.

One aspect of the present invention is an energy storage device including a negative electrode including a negative electrode substrate and a negative active material layer stacked directly or indirectly on at least one surface of the negative electrode substrate, the negative active material layer containing a negative active material, the negative active material containing hollow graphite particles having a median diameter D1 and solid graphite particles having a median diameter D2 smaller than the median diameter of the hollow graphite particles.

A flexible energy storage device with a redox-active biopolymer organogel electrolyte is provided. The flexible energy storage device can include a pair of electrodes separated by the redox-active biopolymer organogel electrolyte. The redox-active biopolymer organogel electrolyte can include a biopolymer organogel, redox-active molybdenum-containing ions, and a secondary ionic substance. The flexible energy storage device may retain greater than 75% of an unbent specific capacitance when bent at an angle of 10° to 170°.

Lithium-based battery or capacitor (200, 300) or sodium-based battery or capacitor (200, 300), the battery or capacitor (200, 300) comprising: an anode (210, 310) comprising a metallic current collector foil (212, 312) having a porous layer of particles of an anode material (214, 314) bonded to each side of the current collector foil (212, 312) of the anode (210, 310), a cathode (202, 302) comprising a metallic current collector foil (204, 304) having an equally sized and shaped porous layer of particles of a cathode material (206, 306) bonded to each side of the current collector foil (204, 304) of the cathode (202, 302), wherein the anode (210, 310) and cathode (202, 302) are arranged such that a layer of a bonded anode material (214, 314) is facing a layer of a bonded cathode material (206, 306), which are kept separate by at least one porous separator (208, 308) which is connected to the facing layers of the bonded anode and cathode material (214, 314;206, 306) is congruent, wherein the pores of the separator (208, 308) and the layers of the anode and cathode material (214, 314; 206, 306) are permeated with a non-aqueous liquid electrolyte, wherein the current collector foils (204, 212) have connecting tabs (204'', 212''') for electrical contact with an external electrical circuit for the flow of an electric current to or from the battery or capacitor (200, 300); ; wherein the current collector foil (212, 312, 204, 304) made of metal of one of the anode (210, 310) and cathode (202, 302), or of both, includes an additional foil sub-area (204'', 212'', 312'', 304'') which is not coated with anode or cathode material (214, 314; 206, 306) and which is located outside its foil area of ​​the coated anode or cathode material (214, 314;206, 306), wherein the extended area of ​​the metallic current collector foil (204, 212, 304, 312) has a connecting tab (204'''', 212'''', 304'''', 312'''') for electrical contact with an external current-consuming device, so that an electric current generated during operation of the battery or capacitor (200, 300) can be passed through the extended area of ​​the metallic current collector foil (204, 212, 304, 312) to heat the extended area of ​​the current collector foil (204, 212, 304, 312), wherein the extended area of ​​the metallic current collector foil (204, 212, 304, 312) is available for use during operation of the battery or capacitor (200, 300), is dimensioned and malleable to touch and heat the battery or capacitor (200, 300) or to touch and heat a separate working battery or capacitor (200, 300).;

A non-aqueous electrolyte solution for a secondary battery, containing a first compound represented by the following Formula (1), a second compound being at least one selected from the group consisting of a compound represented by the following Formula (2), a compound represented by the following Formula (3), and a compound represented by the following Formula (4), a non-aqueous solvent, and an electrolyte.

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).

Provided is a positive electrode active material for a lithium secondary battery that is excellent in electric conductivity and energy density. 【Solution means】It contains a lithium composite compound capable of lithium intercalation / deintercalation. The lithium composite compound contains a plurality of particulate substances, and at least a part of the particulate substances has an amorphous carbon coating layer with a thickness of 1 to 500 nm formed on at least a part of the surface, and the impurity content is less than 6.05 wt%. The lithium composite compound is a positive electrode active material for a lithium secondary battery represented by the following Chemical Formula 1: [Chemical Formula 1]Li p Fe 1-x-y M x A y A’ z P 1-z O w In the formula, M is at least one selected from Mn, Ni, and Co; A is at least one selected from Ag, Al, As, Au, Ba, Be, Bi, Ca, Cd, Ce, etc.; A’ is at least one selected from C, Si, S, N, B, F, Cl, and I.

This invention belongs to the field of supercapacitor technology. It discloses a method for preparing a Russian nesting doll-shaped porous carbon material and its application in a high-performance potassium-ion hybrid capacitor. The method includes simultaneously adding dihydrazine malonate and potassium hydroxide in a 1:1 molar ratio to a ball mill, grinding and aerating for at least 30 minutes, and transferring the resulting powder into a tube furnace under a N2 atmosphere at 2... o C min ‑1 Heating rate to 800 o C was calcined for 0.5 hours to obtain the carbonized product, which was then treated with deionized water and HCl (1 mol L). ‑1 The carbonized products were washed multiple times and freeze-dried for two days to obtain the final product. A potassium-ion hybrid capacitor assembled using Russian nesting doll-shaped porous carbon as the negative electrode and activated carbon as the positive electrode exhibits high energy density, ultra-high power output, and long cycle life, highlighting the superiority of the Russian nesting doll-shaped porous structure. This invention is simple to operate and environmentally friendly, and provides important guidance for the design of three-dimensional pore structures, especially multi-channel pore structures.

This method for manufacturing an electric power storage module comprises a first inspection step for inspecting a module to be inspected within a chamber. In the first inspection step, the following inspections are performed simultaneously: a first airtightness inspection between a first cell and a first adjacent cell that includes an internal space adjacent to an internal space of the first cell, among a plurality of cells to be inspected; and a second airtightness inspection between the first cell and a second adjacent cell that includes a frame adjacent to a first cell frame, among the plurality of cells to be inspected.

Provided herein is a static energy storage cell, comprising: (i) a first electrode and a second electrode, (ii) an electrolyte system, comprising: a. a membrane comprising a crosslinked hydrophilic polymer hydrated in an aqueous solution, wherein the membrane is located between the first electrode and the second electrode; b. a first electrolyte comprising a first species capable of undergoing a redox reaction at the first electrode, wherein the first electrolyte is located between the membrane and the first electrode; c. a second electrolyte comprising a second species capable of undergoing a redox reaction at the second electrode, wherein the second electrolyte is located between the membrane and the second electrode, wherein the first electrode and the second electrode are carbon electrodes, wherein the first species is a metal species, and wherein the second species is a halogen species. Also provided is a method of manufacturing a static energy storage cell.

The application belongs to the field of electrochemical energy storage, and discloses a nickel-sulfur-selenium compound / nitrogen-doped carbon composite material, a preparation method thereof and an energy storage device. The preparation method comprises the following steps: dissolving nickel ammonium sulfate, citric acid and sodium chloride in water to obtain a mixed solution, and then evaporating the mixed solution to obtain a solid precursor; the mass ratio of nickel ammonium sulfate, citric acid and sodium chloride is 1:(0.8-1.2):(8-15); the solid precursor is placed in a reducing atmosphere, calcined at 500-800 DEG C for 2-4 h to obtain a triniickel disulfide / nickel / nitrogen-doped carbon composite material; the triniickel disulfide / nickel / nitrogen-doped carbon composite material is uniformly mixed with selenium powder, and then placed in an inert atmosphere, calcined at 400-500 DEG C for 2-4 h to obtain the final nickel-sulfur-selenium compound / nitrogen-doped carbon composite material; the mass ratio of the triniickel disulfide / nickel / nitrogen-doped carbon composite material and the selenium powder is 1:(2-5). The application can improve the stability of the potassium ion hybrid capacitor electrode material.