60results about "Non-aqueous electrolytes" patented technology

Systems and methods of the various embodiments may provide bifacial sealed gas diffusion electrode (GDE) assemblies. In some embodiments, a bifacial sealed gas diffusion electrode (GDE) assembly includes active electrode layers on two opposing sides of the assembly. Various embodiments may provide architecture and / or sealing methods for GDE assemblies. In various embodiments, the GDE assemblies may be for use in devices. In various embodiments, the devices may be primary or secondary batteries. In various embodiments, these devices may be useful for energy storage. For example, bifacial sealed GDE assemblies of the various embodiments may form cathode electrodes (sometimes called air electrodes) of a battery, such as a metal-air battery.

Provided is a positive electrode active substance that increases the discharge capacity of a battery. This positive electrode for a non-aqueous electrolyte secondary battery comprises a positive electrode current collector and a positive electrode mixture layer formed on the surface of the positive electrode current collector. The positive electrode mixture layer contains: a positive electrode active substance that includes a lithium transition metal complex oxide with a layered halite structure; and a phosphate. The lithium transition metal complex oxide contains at least nickel and aluminum, and calcium and / or strontium; the content ratio of nickel in the lithium transition metal complex oxide is at least 75 mol% relative to the total amount of metal elements other than lithium; and the phosphate content of the positive electrode mixture layer, if the positive electrode active substance content is 100 parts by mass, is 0.1–5 parts by mass.

The invention belongs to the technical field of electrolyte materials, and discloses a high-purity lithium bis (fluorosulfonyl) imide solution as well as a preparation method and application thereof. The preparation method of the high-purity lithium bis (fluorosulfonyl) imide solution comprises the following steps: 1) mixing inert chloralkane and lithium carbonate to form a suspension, dropwise adding bis (fluorosulfonyl) imide into the suspension at reaction temperature and pressure for reaction, after the reaction is finished, performing filter pressing, washing, and performing filter pressing again to obtain a filter cake; and 2) crushing the filter cake, feeding the crushed filter cake into a closed-loop circulating fluidized bed, sequentially drying in a low-temperature area and a medium-temperature area, instantaneously contacting and dissolving the obtained hot powder with an atomized and sprayed carbonate solvent to form a solution, and performing microfiltration to obtain the high-purity lithium bis (fluorosulfonyl) imide solution. The lithium bis (fluorosulfonyl) imide solution has ultra-high purity and ultra-low moisture, the content of other impurities such as chloride ions, free acids and metal ions is extremely low, additional steps of dehydration, purification or acidity adjustment and the like are not needed, and the lithium bis (fluorosulfonyl) imide solution can be directly used for preparing a high-performance lithium ion battery electrolyte.

To provide a binder for a non-aqueous electrolyte battery that enables the formation of an electrode material layer with an excellent flexibility and toughness.SOLUTION: There is provided a binder for a non-aqueous electrolyte battery including a polymer, the binder including a segment A with a glass transition temperature of 25°C or lower and a segment B with a melting point of at least 50°C.SELECTED DRAWING: None

The invention relates to an electrochemical cell comprising at least one positive electrode; at least one negative electrode; and an electrolyte composition in contact with the positive and negative electrodes; wherein the positive electrode is produced by a solvent-free process; and the electrolyte composition comprises sulfur dioxide and at least one conducting salt. The present invention further relates to a vehicle comprising the electrochemical cell.

This positive electrode active material is a composite oxide having a crystal structure belonging to a space group R-3m and represented by a composition formula of Li1+aNibMncXdOe, in which: X is at least one type selected from the group consisting of typical elements and transition metal elements other than Li, Ni, and Mn; a≤1.15, 0.35≤b≤0.70, 0.30≤c≤0.65, and 0≤d≤0.07 are satisfied; and e is a value satisfying electrical neutrality. The positive electrode active material has a value (α×β) of 0.090 or lower, which is the product of a Ni mixing rate α determined through Rietveld analysis and a strain β determined using the Williamson-Hall method.

Embodiments of the present application provide a non-aqueous electrolyte, a secondary battery and an electric device. The non-aqueous electrolyte comprises additives; the additives comprise a first additive and a second additive; the first additive is any one or more cyclic sulfate compounds having a structure represented by general formula (I); the second additive is an organic base additive; the organic base additive comprises any one or more of groups consisting of 5-12 membered aromatic heterocyclic organic bases or 5-12 membered aliphatic heterocyclic organic bases; ring structures in the 5-12 membered aromatic heterocyclic organic bases and the 5-12 membered aliphatic heterocyclic organic bases contain nitrogen atoms.

The present invention relates to metal-substituted lithium-rich solid electrolytes, methods for producing said solid electrolytes, and batteries containing said solid electrolytes. These solid electrolytes exhibit increased ionic conductivity. Furthermore, batteries containing the solid electrolytes according to the present invention have optimized capacity.

This invention relates to a shear-thickening electrolyte and its preparation method. The shear-thickening electrolyte exhibits impact-hardening properties under high excitation and flame-retardant properties under low excitation. The shear-thickening electrolyte comprises lithium salt, organic solvent, and mesoporous particulate filler for adsorbing flame retardants. The preparation method includes the following steps: a. synthesis of mesoporous silica; b. dispersion of the product obtained in step a in a triphenyl phosphate ethanol solution, followed by stirring and ultrasonic adsorption; c. uniform dispersion of the product obtained in step b in a conventional electrolyte. The shear-thickening electrolyte possesses the functions of rapid hardening under high impact rates to resist external impacts and flame retardancy under low excitation rates, protecting users from impact and high-temperature damage.

A positive current collector, a positive electrode plate, a secondary battery, and an apparatus, the positive current collector comprising a support layer, provided with two opposing surfaces in the thickness direction thereof, and a conductive layer arranged on at least one of the two surfaces of the support layer, wherein the conductive layer has a thickness D1 satisfying 300 nm≤D1≤2 μm; and when the positive current collector has a the tensile strain of 1.5%, the conductive layer has a sheet resistance growth rate of T≤30%. The positive current collector has higher safety performance and meanwhile higher electrical performance, and thus a positive electrode plate and a secondary battery adopting the positive current collector could have higher safety performance and meanwhile higher electro-chemical performance.

An electrode for lithium ion batteries, containing a sulfonic acid compound which contains a sulfonate anion represented by the following Formula (1) and a Ni cation,         R-SO3-     (1), in the Formula (1), R represents an alkyl group having 1 to 5 carbon atoms, which may be substituted with a fluorine atom, an alkenyl group having 2 to 5 carbon atoms, which may be substituted with a fluorine atom, an alkynyl group having 2 to 5 carbon atoms, which may be substituted with a fluorine atom, or an aryl group which may be substituted with a fluorine atom, in which the electrode contains a positive electrode active material layer, and the positive electrode active material layer contains, as a positive electrode active material, LizNi(1-x-y)CoxMyO2, in which 0 ≤ x ≤ 0.40, 0 ≤ y ≤ 0.40, 0.90 ≤ z ≤ 1.20, and M is at least one element selected from the group consisting of Mn, V, Mg, Mo, Nb, and Al.

To suppress reduction of input-output characteristics.SOLUTION: A negative electrode includes a negative electrode collector, and a negative electrode active material layer including a negative electrode active material. The negative electrode active material layer includes a first region and a second region. The second region is less dense than the first region by at least 7%. The value of the second region occupies more than 7% and 50% at most of the volume of the negative electrode active material layer.SELECTED DRAWING: Figure 1

Provided is a binder for nonaqueous electrolyte batteries, which contains a polymer that contains a segment A having a glass transition temperature of 25 DEG C or less and a segment B having a melting point of 50 DEG C or more.

This application provides a sodium secondary battery electrolyte, a sodium secondary battery, and an electric apparatus. The sodium secondary battery electrolyte is provided, and the electrolyte includes a diluent, where the diluent includes alkane with a general formula CnH2n+2, where n is 8 to 13. The diluent can improve high-temperature cycling performance of a battery, reduce high-temperature gas production of the battery, and enhance electrochemical performance and safety performance of the battery at high temperature.

According to one embodiment, provided is an air battery including a negative electrode, an air electrode to which oxygen is supplied, a solid electrolyte layer positioned between the negative electrode and the air electrode, an aqueous electrolyte layer positioned between the solid electrolyte layer and the air electrode, and a proton conduction layer positioned between the aqueous electrolyte layer and the air electrode. The aqueous electrolyte layer includes an aqueous electrolyte including a polyprotic acid having two or more carboxyl groups, an electrolyte salt, and water.

The systems and methods of various embodiments may provide a two-sided sealed gas diffusion electrode (GDE) assembly. In some embodiments, the two-sided sealed gas diffusion electrode (GDE) assembly includes active electrode layers on two opposing sides of the assembly. Various embodiments may provide architectures and / or sealing methods for the GDE assembly. In various embodiments, the GDE assembly may be for use in a device. In various embodiments, the device is a primary or secondary battery. In various embodiments, these devices may be useful for energy storage. For example, the two-sided sealed GDE assembly of various embodiments may form the cathode electrode (sometimes referred to as the air electrode) of a battery, such as a metal-air battery.

A non-aqueous electrolyte secondary battery according to one embodiment of the present invention comprises: a positive electrode containing a positive electrode active substance; a negative electrode; and a non-aqueous electrolyte. The positive electrode active substance comprises a lithium transition metal compound oxide containing at least Ni. The lithium transition metal compound oxide is secondary particles formed by aggregation of primary particles, and the primary particles present on the surface of the secondary particles have a crystal structure that includes a rock salt structure, a spinel structure, and a layered rock salt structure formed in order from the particle surface.

A positive electrode active material for nonaqueous electrolyte secondary batteries according to one embodiment of the present invention contains a lithium transition metal composite oxide which is represented by composition formula LixMnyNizTiaMbO2-cFc (wherein M represents at least one element that is selected from among P, Co, Si, Sr, Nb, W, Mo, Ca, Mg, Sb, Na, B, V, Cr, Fe, Cu, Zn, Ge, Zr, Ru, K, Bi and Al; 1.0 < x ≤ 1.2; 0.4 ≤ y ≤ 0.8; 0 ≤ z ≤ 0.4; 0 < a ≤ 0.03; 0 ≤ b ≤ 0.05; 0 < c ≤ 0.1; and (x + y + z + a + b) ≤ 2).

The application belongs to the technical field of batteries and electric power, and discloses a storage battery activating liquid for a transformer substation, which is characterized by being composed of sodium sulfate, sodium chloride, calcium phosphate, magnesium phosphate, cobalt sulfate, cadmium sulfate, stannous sulfate, copper sulfate, zinc sulfate, nickel sulfate and aluminum sulfate solution. The application also discloses a storage battery activating method for a transformer substation and a holiday barbecue vehicle activated by the activating method. The application has the following main beneficial effects: good activating / repairing effect, improved capacity of returned storage batteries, chemical environmental protection, low cost and wide application range.

The invention discloses a dianion salt-based magnesium fuel cell electrolyte and a preparation method, and belongs to the technical field of magnesium fuel cells, the electrolyte is composed of dianion composite magnesium salt, propylene carbonate (PC), tetrahydrofuran (THF), magnesium fluoride (MgF) nanoparticles, 1, 3-dioxolane (DOL), diethylene glycol dimethyl ether (G2) and trimethyl phosphate (TMP) according to a specific mass percentage, and the dianion salt-based magnesium fuel cell electrolyte is prepared from dianion composite magnesium salt, propylene carbonate (PC), tetrahydrofuran (THF), magnesium fluoride (MgF) nanoparticles, 1, 3-dioxolane (DOL), diethylene glycol dimethyl ether (G2) and trimethyl phosphate (TMP) according to a specific mass percentage. The mass ratio is 1: (1.6-2.0). The preparation method comprises the four steps of composite salt preparation, solvent dehydration, salt dissolution and additive mixing, and the ionic conductivity and thermal stability of the electrolyte are improved through specific ultrasonic parameters, dehydration conditions and annealing treatment.

The present invention relates to a nonaqueous electrolyte secondary battery. The nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and an electrolyte solution. A positive electrode active material layer is disposed on a surface of a positive electrode substrate. The positive electrode active material layer includes a first layer and a second layer. The first layer is disposed between the positive electrode substrate and the second layer. The positive electrode active material layer includes a positive electrode active material, carbon black, and fibrous carbon. The mass fraction of the carbon black in the first layer is higher than the mass fraction of the carbon black in the second layer. In the first layer, the mass fraction of the carbon black is 1.5% to 5% relative to the mass of the positive electrode active material. The mass fraction of the fibrous carbon in the second layer is higher than the mass fraction of the fibrous carbon in the first layer. In the second layer, the mass fraction of the fibrous carbon is 0.2% to 1% relative to the mass of the positive electrode active material.

The invention relates to the technical field of electrolytes, in particular to a dianion salt magnesium fuel cell non-aqueous electrolyte which is composed of the following components: composite salt, a mixed solvent, magnesium fluoride (MgF) nanoparticles, 1, 3-dioxolane (DOL), diethylene glycol dimethyl ether (G2) and trimethyl phosphate (TMP). According to the invention, a composite salt system composed of magnesium trifluoromethanesulfonate and magnesium bis (trifluoromethanesulfonyl) imide is adopted, and the ion transmission capability of the electrolyte is significantly improved through a dianion synergistic effect.

A non-aqueous electrolyte electricity storage element according to one aspect of the present invention is provided with: an electrode body having a positive electrode and a negative electrode; a non-aqueous electrolyte; and a container for accommodating the electrode body and the non-aqueous electrolyte. The positive electrode has a positive electrode active material layer containing a positive electrode active material; the positive electrode has a positive electrode active material layer containing a positive electrode active material, the negative electrode has a negative electrode active material layer containing a negative electrode active material, the positive electrode active material contains tungsten element, the negative electrode active material contains graphite, and the non-aqueous electrolyte solution contains a first additive having a reductive decomposition potential of 1.5 V (vs. Li / Li +) or more. The ratio (A1 / B) of the amount of substance (A1) of the first additive contained in the non-aqueous electrolyte solution to the surface area (B) of the negative electrode active material layer is 2.0 * 10-7 mol / m2 or more.

This positive electrode active material for non-aqueous electrolyte secondary batteries is composed of single particles and / or secondary particles containing not more than 10 primary particles, of a lithium transition metal composite oxide containing not less than 85% by mole of Ni relative to the total number of moles of metal elements other than Li. In the positive electrode active material, the particle cross-sections of the single particles and the primary particles of the lithium transition metal composite oxide each have a polygonal shape that includes a side having a length of 1.5 µm or greater, and at least three interior angles of the polygonal shape are 45-160°.

The present application provides a non-aqueous electrolyte secondary battery which has a small initial resistance and inhibits an increase in resistance during repeated charge and discharge. The non-aqueous electrolyte secondary battery disclosed herein has a stacked electrode body including a single cell unit in which a first electrode, a first separator, a second electrode, and a second separator are stacked. The first electrode has a first current collector and a first active material layer. The second electrode has a second current collector and a second active material layer. The first separator and the second separator have a larger area of a main surface than the first active material layer and the second active material layer. The second electrode has a second active material layer non-formed portion in which the second active material layer is not formed and the second current collector is exposed. The second active material layer non-formed portion has a defect. The first separator and the second separator are not bonded to the second active material layer of the second electrode, and the first separator and the second separator are welded at the defect of the second active material layer non-formed portion.

The embodiments of this application provide a non-aqueous electrolyte, a secondary battery, and a power consumption device. The non-aqueous electrolyte includes an additive, the additive comprising a first additive and a second additive, the first additive being any one or more cyclic sulfate ester compounds having a structure represented by general formula (I), and the second additive being an organic base additive, the organic base additive comprising any one or more from the group consisting of 5-12 membered aromatic heterocyclic organic bases or 5-12 membered aliphatic heterocyclic organic bases, the ring structure of the 5-12 membered aromatic heterocyclic organic base and the 5-12 membered aliphatic heterocyclic organic base contains a nitrogen atom. JPEG2026518320000083.jpg4571

A battery module includes a plurality of cylindrical batteries and lead plate connected to cylindrical batteries and electrically connecting the plurality of cylindrical batteries. Cylindrical battery includes can bottom valve including a thin-walled line ruptured and opening an exhaust port when an internal pressure of an outer covering can becomes higher than a threshold pressure. Lead plate includes double-supported arm arranged opposing a can bottom of cylindrical battery and coupled to lead plate at both ends at a position opposing can bottom valve, and gas permeation gap of exhaust gas ejected from the exhaust port on both sides of double-supported arm.

A liquid electrolyte lithium secondary battery cell comprising: —a positive electrode material comprising a lithium transition metal-based oxide powder having a general formula Li1+a ((Niz (Ni0.5Mn0.5)y Cox)1−k Ak)1−a O2, wherein A is a dopant, −0.025≤a≤0.025, 0.18≤x≤0.22, 0.42≤z≤0.52, 1.075<z / y<1.625, x+y+z=1 and k≤0.01; and—an electrolyte composition comprising: a) at least one cyclic carbonate, b) at least one fluorinated acyclic carboxylic acid ester, c) at least one electrolyte salt, d) at least one lithium compound selected from lithium phosphate compounds, lithium boron compounds, lithium sulfonate compounds and mixtures thereof, e) at least one cyclic sulfur compound, and f) optionally at least one cyclic carboxylic acid anhydride.

The present application provides a positive electrode active material capable of obtaining a nonaqueous electrolyte secondary battery having a high energy density, a nickel-manganese composite hydroxide suitable as a precursor thereof, and a production method capable of easily producing them on an industrial scale. A nickel-manganese composite hydroxide and a production method thereof, and the like are provided, the nickel-manganese composite hydroxide being represented by general formula (1): Ni x Mn y M z (OH) 2+α and composed of secondary particles aggregated from a plurality of primary particles, a half-value width of a diffraction peak of a (001) plane obtained by X-ray diffraction measurement being 0.10° or more and 0.40° or less, and a porosity expressed by 〔(a pore area inside the secondary particle / a cross-sectional area of the secondary particle) x 100〕 (%) being 0.5% or more and 10% or less.

To provide a binder for a non-aqueous electrolyte battery that enables the formation of an electrode material layer with an excellent flexibility and toughness.SOLUTION: There is provided a binder for a non-aqueous electrolyte battery including a polymer, the binder including a segment A with a glass transition temperature of 25°C or lower and a segment B with a melting point of at least 50°C.SELECTED DRAWING: None