125results about "Non-aqueous electrolytes" patented technology

A nonaqueous electrolyte secondary battery according to an aspect of the present disclosure includes: an electrode body in which a positive electrode plate and a negative electrode plate are wound with a separator interposed therebetween; and an exterior package which receives the electrode body, the negative electrode plate includes a negative electrode collector, a first negative electrode mixture layer formed on a winding inside first surface of the negative electrode collector, and a second negative electrode mixture layer formed on a winding outside second surface of the negative electrode collector, the first negative electrode mixture layer contains first graphite particles as a primary component, the second negative electrode mixture layer contains second graphite particles as a primary component, and the first graphite particles has an internal void rate lower than an internal void rate of the second graphite particles.

Provided herein are methods of purifying graphite comprising: electrochemically treating graphite comprising an impurity selected from the group consisting of metals, metal oxides, and combinations thereof in the presence of an electrolyte; a portion of the impurities is removed by electrochemical treatment and purified graphite is provided. Also provided are purified graphite provided by such a method, as well as a negative electrode and a battery each comprising the purified graphite.

The invention discloses a high-temperature and high-pressure electrolyte additive, an electrolyte containing the high-temperature and high-pressure electrolyte additive and a lithium ion battery. The electrolyte additive is selected from at least one of cyclic borate compounds. According to the invention, after the cyclic borate compound (such as bis (pinacol) diboron or 3-(trifluoromethyl) phenylboronic acid pinacol ester compound) is applied to the high-nickel lithium ion battery as the electrolyte additive, the battery can still maintain the capacity greater than or equal to 88% at the working voltage of 2.8-4.5 V (55 DEG C, and 300 cycles), meanwhile, the rate capability of the battery is improved, and the service life of the battery is prolonged. Compared with a battery without the cyclic borate compound additive, the cyclic borate compound additive is greatly improved under the same battery test condition. The cyclic borate additive is added into the electrolyte, so that the cycle performance of the lithium ion battery at high temperature and high voltage can be improved, and the rate capability of the battery can be improved.

An electrolyte for secondary battery, a secondary battery including the electrolyte, a battery module including the secondary battery, a battery pack including the secondary battery, and an electric apparatus including the secondary battery. The electrolyte for secondary battery includes an ester solvent and an additive, where the additive includes one or more of an ionic liquid additive, an amide compound additive, an inert cation additive, and an alloy additive.

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 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.

The embodiment of the invention provides 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 with a structure as shown in a general formula (I), and the second additive is an organic alkali additive, the organic base additive comprises any one or more of 5-12-membered aromatic heterocyclic organic base or 5-12-membered alicyclic organic base, nitrogen atoms are contained in ring structures of the 5-12-membered aromatic heterocyclic organic base and the 5-12-membered alicyclic organic base, and # imgabs 0 #

An electrolyte composition includes: a sulfonylimide compound represented by the following general formula (1) as an electrolyte salt; and an amidosulfuric acid component.LiN(X1SO2)(X2SO2)  (1)(where X1 and X2 are identical to or different from each other, and each represent a fluorine atom, an alkyl group with a carbon number of 1 to 6, or a fluoroalkyl group with a carbon number of 1 to 6).

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.

The present invention provides a non-aqueous electrolyte for a lithium secondary battery and a lithium secondary battery including the same. Specifically, the non-aqueous electrolyte for a lithium secondary battery of the present invention may include a lithium salt, an organic solvent, and a compound represented by Chemical Formula 1 as a first additive. The present invention also provides a lithium secondary battery including the non-aqueous electrolyte for a lithium secondary battery, which has improved high-temperature storage characteristics and high-temperature cycle characteristics.

Provided are: a nonaqueous electrolyte secondary battery positive electrode active material that has high crystallinity, that causes less amount of Mn deposition on a negative electrode, and that can form a secondary battery having excellent cycle characteristics; and a nonaqueous electrolyte secondary battery using the nonaqueous electrolyte secondary battery positive electrode active material. The nonaqueous electrolyte secondary battery positive electrode active material according to the present invention is formed of a lithium-manganese-nickel complex oxide including a spinel-type crystal structure, wherein the lithium-manganese-nickel complex oxide has a crystallite diameter not smaller than 1000 Å and is formed of primary particles that have a polyhedron shape having more than eight surfaces. The proportion of ungrown particles not having the polyhedron shape of the primary particles in the lithium-manganese-nickel complex oxide is preferably not higher than 5%.

Provided herein is a process for purifying graphite comprising: electrochemically treating a graphite comprising an impurity selected from a metal, metal oxide and combinations thereof in the presence of an electrolyte; thereby removing a portion of the impurity as a result of the electrochemical treatment and providing a purified graphite. Also provided is purified graphite provided by such process, a negative electrode and a battery, each comprising said purified graphite.

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.

To provide an air battery which has high capacity and is excellent in cyclic performance.SOLUTION: An air battery comprises: a negative electrode; an air electrode to which oxygen is supplied; a solid electrolyte layer located between the negative electrode and the air electrode; an aqueous electrolyte layer located between the solid electrolyte layer and the air electrode; and a proton conductive layer located between the aqueous electrolyte layer and the air electrode. The aqueous electrolyte layer contains an aqueous electrolyte containing a polyvalent acid having two or more carboxyl groups, an electrolytic salt, and water.SELECTED DRAWING: Figure 1

The present invention relates to a metal-substituted lithium-rich solid electrolyte, a method for manufacturing said solid electrolyte and a battery comprising said solid electrolyte. These solid electrolytes display an increased ionic conductivity. Furthermore, the battery comprising the solid electrolyte according to the invention have an optimized capacity.

A positive electrode active material to be used in a non-aqueous electrolyte secondary battery and containing a lithium transition metal compound which contains Ni in a proportion constituting 80-94 mol%, inclusive, relative to the total mole number of the metal elements other than Li, and also contains Nb in a proportion constituting 0.1-0.6 mol%, inclusive, relative thereto, the positive electrode active material being characterized in that the Nb amount n1 in a first sample solution obtained by adding 0,2g of the lithium transition metal compound to a hydrochloric acid aqueous solution comprising 5mL of pure water / 5mL of 35% hydrochloric acid, and the Nb amount n2 in a second sample solution obtained by immersing a filter used to filter the first sample solution in a fluonitric acid comprising 5mL of 46% hydrofluoric acid / 5mL of 63% nitric acid satisfy the condition of 50%≤n1 / (n1+n2)<75% when converted to molar quantities.

The present disclosure discloses a battery core, a battery core preparation method, a starting battery for a fuel engine, and a vehicle. The battery core provided by the present disclosure includes a positive electrode and a negative electrode. The positive electrode includes composite lithium iron phosphate particles, and the composite lithium iron phosphate particles include at least two types of lithium iron phosphate particles having different D50 particle diameters. The negative electrode includes composite graphite particles, and the composite graphite particles include at least two types of graphite particles having different D50 particle diameters.

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.

The present invention provides a positive electrode active material which is capable of achieving high thermal stability at low cost.　A positive electrode active material for lithium ion secondary batteries, said positive electrode active material containing a lithium-nickel composite oxide that has a hexagonal lamellar structure and is composed of secondary particles, in each of which a plurality of primary particles aggregate. The lithium-nickel composite oxide contains lithium (Li), nickel (Ni), manganese (Mn), titanium (Ti), niobium (Nb), and optionally element M1; and the amount of substance ratio among those elements is expressed as Li:Ni:Mn:M:Ti:Nb = a:(1 – x1 – y1 – b – c):x1:y1:b:c (wherein 0.95 ≤ a ≤ 1.25, (1 – x1 – y1 – b – c) < 0.80, 0.03 ≤ x1 ≤ 0.35, 0 ≤ y1 ≤ 0.35, 0.005 ≤ b ≤ 0.05, 0.001 < c ≤ 0.03), while satisfying (b + c) ≤ 0.06 and b > c. If this positive electrode active material for lithium ion secondary batteries is immersed in water, the amount of lithium dissolved in water is 0.07% by mass or less relative to the entirety of the positive electrode active material.

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.

The present application provides an electrolyte for a sodium secondary battery, a sodium secondary battery, and a power consuming device. The electrolyte for a sodium secondary battery includes a diluent, and the diluent is represented by the general formula C n H 2n+2 The diluent contains an alkane, and the value of n is 8 to 13. The diluent can improve the high-temperature cycle performance of the battery, reduce the high-temperature gas generation phenomenon of the battery, and improve the electrochemical performance and safety performance of the battery at high temperatures.

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.