2431 results about "Aqueous electrolyte" patented technology

The invention provides a battery monomer, a battery device and a power utilization device. The battery monomer comprises an electrode assembly, wherein the electrode assembly comprises a positive plate, a negative plate and a non-aqueous electrolyte; the positive plate comprises a positive current collector and a positive film layer, and the negative plate comprises a negative current collector and a negative film layer; the positive electrode film layer comprises a positive electrode active material, and the positive electrode active material comprises a lithium manganese iron phosphate material and a nickel cobalt lithium manganate material; in the nickel cobalt lithium manganate material, the molar ratio of Ni in the sum of the three elements of Ni, Co and Mn is 0.5-0.95; the non-aqueous electrolyte comprises vinylene carbonate, and the mass content of the vinylene carbonate in the non-aqueous electrolyte is 0.5%-2%; the non-aqueous electrolyte comprises at least one of linear carbonic ester and linear carboxylic ester, and the conductivity of the non-aqueous electrolyte is 9-14 mS / cm. The energy density, the cycle performance and the power performance of the battery monomer are improved at the same time.

The invention provides a lithium manganese iron phosphate battery. The battery comprises a positive pole piece, a negative pole piece and a non-aqueous electrolyte, the positive pole piece comprises a positive active material and a positive active coating arranged on at least one surface of the positive active material; the positive electrode active material comprises lithium manganese iron phosphate LiMnxFe1-xPO4 coated with a carbon coating layer, and x is more than or equal to 0.5 and less than or equal to 0.8; the negative pole piece comprises a negative active material and a negative active coating arranged on at least one surface of the negative active material; the battery satisfies the following relational expressions: 4.5 < = (a / 20 + d) / (b + c) < = 12.8; a is a coated diaphragm resistor of the positive pole piece; b is the compaction density of the positive pole piece; c is the mass percentage content of vinylene carbonate in the positive electrode slurry; and d is the mass percentage content of the lithium bis (fluorosulfonyl) imide in the non-aqueous electrolyte. By optimizing the composition of the lithium ion battery, the low-temperature discharge performance of the battery is improved, and meanwhile, the high-temperature cycle performance is considered.

A lithium-ion battery having excellent high-temperature storage and high-temperature cycling performance. The lithium-ion battery comprises a positive electrode, a negative electrode, and a non-aqueous electrolyte solution. The negative electrode comprises a negative electrode material layer containing a silicon-based material. The non-aqueous electrolyte solution comprises a lithium salt, an organic solvent, and an additive, the organic solvent comprising fluoroethylene carbonate, and the additive comprising a silane compound containing at least one carbon-carbon double bond. The lithium-ion battery satisfies the following conditions: 5≤(S*R) / (F*T)≤35, 5≤f≤15, 1.4≤R≤1.68, 9≤S≤18, and 0.01≤T≤0.5. According to the lithium-ion battery, the mass percentage content of the organic solvent and the additive in the non-aqueous electrolyte solution are controlled, and the mass percentage content of elemental silicon in the negative electrode material layer is controlled and the compaction density of the negative electrode material layer is controlled to be within a certain range, such that the lithium-ion battery has excellent high-temperature storage performance and an excellent high-temperature cycle life, while also taking into account high energy density.

The invention provides a non-aqueous electrolyte, a lithium ion battery, a battery module, a battery pack and a power utilization device, the non-aqueous electrolyte comprises a lithium salt, an organic solvent and an electrolyte additive, and the electrolyte additive comprises 1, 3-propane sultone, fluoroethylene carbonate, vinylene carbonate, lithium tetrafluoroborate and a compound I shown in the formula I. The non-aqueous electrolyte is applied to the lithium ion battery, and the cycle life of the lithium ion battery is prolonged.

The present invention provides a non-aqueous electrolyte characterized by comprising: a lithium salt; an organic solvent; and an additive, wherein the additive includes a compound represented by a specific chemical formula. The non-aqueous electrolyte according to the present invention can suppress the deterioration of a positive electrode, reduce side reactions between the positive electrode and the electrolyte, and form a stable SEI film on a negative electrode, and thus can improve the high-temperature cycle characteristics and high-temperature storage characteristics of a lithium secondary battery comprising the non-aqueous electrolyte.

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.

The invention discloses a two-phase electrolyte, a preparation method thereof and a liquid energy storage battery system, and belongs to the technical field of electrochemical energy storage. According to the invention, a liquid-liquid double-phase electrolyte is composed of a water-phase electrolyte and an organic-phase electrolyte, wherein the organic-phase electrolyte contains a coupling system of 1-(methyl-decyl)-3-methylimidazolium bromide, tris (methyl-decyl) methyl ammonium bromide and (10-octadecyl) alkyl trimethyl ammonium bromide in a molar ratio of (5-7): (2-4): 1. During charging, positive electrode bromide ions are subjected to an oxidation reaction to generate a bromine simple substance, and meanwhile, the bromine simple substance and a coupling system of the quaternary ammonium bromide compound and the bromine complexing agent provided by the invention form a stable polybromine complex product, so that the polybromine complex product is prevented from being migrated into a water-phase electrolyte, and the purpose of improving the stability of the water-phase electrolyte in the absence of a diaphragm is achieved. The self-discharge reaction of bromine is significantly inhibited at a high temperature exceeding the boiling point temperature of bromine, the coulombic efficiency and energy efficiency of the liquid energy storage battery are improved, the system cost is reduced, and the long-term cycle stability of the liquid energy storage battery is improved.

The invention belongs to the technical field of electrochemical energy storage, and particularly relates to a low-temperature aqueous electrolyte for anchoring I < + > ions based on a double-coordination structure and a low-temperature four-electron aqueous zinc-iodine battery. The low-temperature aqueous electrolyte is a mixed solution of a zinc salt, an electrolyte additive and water, and the low-temperature aqueous electrolyte comprises 2-5 mol / L of the zinc salt and 0.3-0.6 mol / L of the electrolyte additive; the zinc salt is zinc perchlorate or zinc tetrafluoroborate. The low-temperature four-electron aqueous zinc-iodine battery comprises the low-temperature aqueous electrolyte. Compared with the prior art, the invention at least has the following beneficial effects: (1) the corrosion risk caused by chloride ion concentration is reduced; (2) efficient four-electron iodine positive electrode reaction is realized; and (3) obtaining the low-temperature four-electron aqueous zinc-iodine battery.

The invention discloses a non-aqueous electrolyte and a lithium ion battery containing the non-aqueous electrolyte. The non-aqueous electrolyte comprises a lithium salt, a non-aqueous organic solvent and an additive, wherein the additive comprises a benzenesulfonyl fluoride compound as shown in a structural formula I and a carbonate bisulfate compound as shown in a structural formula II. According to the non-aqueous electrolyte disclosed by the invention, the benzenesulfonyl fluoride compound and the polyol carbonate bisulfate compound are used as additives, and the benzenesulfonyl fluoride compound and the polyol carbonate bisulfate compound are matched for use, so that the ion transmission rate can be increased, the high-temperature cycle performance of the lithium ion battery is improved, the internal resistance is reduced, and the high-temperature storage performance of the lithium ion battery is improved. # imgabs0 #

The present invention discloses a non-aqueous electrolyte for a secondary battery and a secondary battery thereof, the electrolyte comprises an electrolyte salt, a non-aqueous solvent and an additive, the additive at least comprises: a nitrogen-containing heterocyclic compound as a first additive, a film-forming additive with a film-forming potential of less than 1.5 V (vs. Li + / Li) as a second additive, the specific structure of the additive is shown in the specification. The nitrogen-containing heterocyclic compound and the film-forming additive with the film-forming potential lower than 1.5 V (vs.Li < + > / Li) are combined for use, and the nitrogen-containing heterocyclic compound and the film-forming additive are regulated in a specific content ratio range to fully generate a synergistic effect, so that water catching and acid inhibition can be effectively realized, decomposition and gas production can be effectively inhibited at high temperature and high voltage, the stability of the electrolyte is greatly improved, and the service life of the electrolyte is prolonged. And an SEI film with excellent ion transmission capability and structure / thermal stability can be formed on the surface of the electrode, so that the first efficiency of the battery is effectively improved, and the low-temperature performance and the cycle performance of the battery are further improved.

The invention belongs to the technical field of thermoelectricity, and relates to a preparation method and application of a quasi-solid thermoelectric material capable of realizing humidity stability by means of phase separation regulation, the preparation method comprises the following steps: dissolving a negatively charged hydrophilic monomer, an electrically neutral monomer, a cross-linking agent and a photoinitiator in a solvent to obtain a precursor solution, and carrying out an ultraviolet polymerization reaction to form polyelectrolyte gel; mixing the eutectic solvent with an electrolyte aqueous solution containing redox ion pairs and lithium chloride to obtain a quaternary electrolyte system; and immersing the gel into a quaternary electrolyte system, and fully replacing the internal solution through a diffusion effect to obtain the quasi-solid thermoelectric material with stable humidity. The thermoelectric material has the advantages of excellent Seebeck coefficient, good stability, high mechanical strength, large power density and the like, can supply power to wearable electronic products in an actual humidity fluctuation environment, breaks through the main bottleneck of actual application of quasi-solid ionic thermoelectric materials based on ionized water gel, and is wide in application prospect.

The invention provides a non-aqueous electrolyte, a lithium ion battery, a battery module, a battery pack and an electric device. The non-aqueous electrolyte comprises a lithium salt, a non-aqueous organic solvent and a functional additive, and the functional additive comprises a bis-sulfinyl ester structure as shown in a formula I in the specification. When the non-aqueous electrolyte is used in the lithium ion battery, the wettability of the electrolyte can be effectively enhanced, the ionic conductivity of the electrolyte is improved, the low-temperature discharge capacity of the electrolyte is improved, and the stability of the electrolyte under high-temperature and high-voltage conditions is improved; and thus, the discharge capability and the service life of the lithium ion battery in high-temperature storage and high-temperature circulation are improved.

A method for the electrochemical synthesis of ammonia comprises:(a) forming from a gas mixture comprising nitrogen and oxygen an atmospheric pressure nonthermal plasma (APNTP) in a plasma device,(b) introducing the APNTP into an aqueous electrolyte solution to form a solution of one or more species of formula NOx−,(c) contacting the solution of (b) with the cathode of an electrochemical cell which comprises a catalyst which is capable of catalyzing the electrochemical reduction of the one or more species of formula NOx− to NH3, and(d) applying a potential or current over the electrochemical cell to effect the electrochemical synthesis of ammonia.

In order to solve the problems that an existing high-voltage lithium ion battery is insufficient in positive electrode stability and electrolyte is decomposed to produce gas, the invention provides a lithium ion battery which comprises a positive electrode, a negative electrode and a non-aqueous electrolyte, the positive electrode comprises a positive electrode material layer containing a positive electrode active material, the surface of the positive electrode active material is provided with a lithium phosphate coating layer, and the non-aqueous electrolyte is coated on the surface of the negative electrode material layer. The non-aqueous electrolyte comprises a non-aqueous organic solvent, a lithium salt and an additive, the non-aqueous organic solvent comprises cyclic carbonate containing fluoroethylene carbonate, and the additive comprises a compound as shown in a structural formula 1 and a compound as shown in a structural formula 2; the lithium ion battery satisfies the following conditions: 0.2 < = P * (A + B) / (100-C) < = 2.25, 30 < = P < = 150, 10 < = C < = 20, 0.05 < = A < = 0.5, and 0.3 < = B < = 1. The lithium ion battery provided by the invention can keep the intrinsic material stability of the positive electrode active material under a high working voltage condition, and meanwhile, the gas production of the lithium ion battery at a high temperature is obviously reduced.

In order to solve the problem that an existing battery with high-voltage lithium cobalt oxide matched with a silicon-doped negative electrode is insufficient in cycle performance and safety performance, the invention provides a lithium ion battery which comprises a positive electrode, a negative electrode, a diaphragm and a non-aqueous electrolyte, and the non-aqueous electrolyte comprises a non-aqueous organic solvent, electrolyte salt and an additive, the non-aqueous organic solvent comprises acetic acid 2, 2-difluoroethyl ester, the additives comprise a first additive and a second additive, the first additive comprises a sulfur-containing additive as shown in a structural formula 1: # imgabs0 # structural formula 1, and the second additive comprises a nitrile compound; the lithium ion battery satisfies the following conditions: # imgabs 1 #, 0.1 < = a < = 3, 0.5 < = b < = 5, 1 < = c < = 40, 0.2 < = d < = 7, and 5 < = e < = 30. The lithium ion battery provided by the invention has relatively excellent high-temperature cycling stability and relatively good thermal shock resistance safety performance.

The invention discloses an aqueous zinc ion battery electrolyte as well as a preparation method and application thereof, and belongs to the technical field of zinc ion batteries. The vanadic acid additive takes a Zn-sulfonated hydrogen bond organic framework as a carrier, and 4-6wt% of vanadate is loaded on the surface of the carrier. Sulfonic acid groups contained in the carrier can cooperate with vanadate to preferentially adsorb free water molecules in an aqueous electrolyte, the erosion activity of the water molecules on the positive electrode material is reduced, a hydrogen bond network structure of the hydrogen bond organic framework can selectively intercept active water molecules, and the water molecules are prevented from participating in oxidation reduction dissolution of the vanadium-based positive electrode material. Meanwhile, the zinc metal ions doped in the carrier can cooperate with the strong polarity of the sulfonic group, regulate and control the solvation structure, reduce the interface impedance and inhibit the growth of zinc dendrites, so that the long-term stability of the aqueous zinc ion battery is improved, and the aqueous zinc ion battery electrolyte capable of inhibiting the dissolution of a positive electrode and stabilizing a zinc negative electrode is obtained.

The invention discloses an interface corrosion resistant aqueous electrolyte and a battery application thereof. The aqueous electrolyte comprises a zwitterionic additive; the zwitterionic additive comprises an imidazolium cation part and a sulfonate anion part; wherein a 1-site N atom in imidazolium is connected with a sulfonate radical through a C1-6 saturated alkyl carbon chain, and a 3-site N atom in imidazolium is connected with a C2-4 unsaturated alkyl carbon chain or a C1-4 saturated alkyl carbon chain. The aqueous electrolyte can effectively relieve the interface corrosion problem of the aqueous battery, so that the cycle stability of the negative electrode is improved, and the preparation of the long-cycle aqueous battery is realized.

This application discloses a nonaqueous electrolyte solution, a secondary battery containing the nonaqueous electrolyte solution, and an electrical device. The nonaqueous electrolyte solution includes: a compound A including a saturated five-membered ring or six-membered ring and at least one fluorine-containing substituent, where the ring contains 1 or 2 oxygen atoms as ring atoms, and a ring carbon atom connected to the oxygen atom in the ring is not directly replaced by fluorine; and a compound B including a saturated five-membered ring or six-membered ring that contains 1 or 2 oxygen atoms as ring atoms, where at least one ring carbon atom connected to the oxygen atom in the ring is directly replaced by at least one fluorine atom. The nonaqueous electrolyte solution can improve cycle performance and low-temperature discharge capabilities of the secondary battery.

The invention relates to the technical field of sodium-ion batteries, in particular to a sodium-ion battery non-aqueous electrolyte, a sodium-ion battery, a battery module, a battery pack and a power utilization device.The sodium-ion battery non-aqueous electrolyte comprises sodium salt, an organic solvent and a functional additive, the sodium salt comprises sodium bis (fluorosulfonyl) imide and sodium hexafluorophosphate, and the organic solvent comprises sodium bis (fluorosulfonyl) imide and sodium hexafluorophosphate. The molar ratio of the sodium bis (fluorosulfonyl) imide to the sodium hexafluorophosphate is (8: 2)-(7: 3); the organic solvent is prepared from chain carbonate and cyclic carbonate, and the functional additive is prepared from 2-trifluoromethyl-1, 3-propene sultone and 1-fluoro-2-methyl-ethylene carbonate. According to the invention, the ionic conductivity and thermal stability of the sodium-ion battery electrolyte can be improved through reasonable proportioning and use of the double-ion sodium salt, and meanwhile, corrosion of sodium bis (fluorosulfonyl) imide to an aluminum structural part can also be avoided. The sodium salt and the functional additive cooperate with each other to form an effective interface film on the surface of the electrode, so that the high-temperature storage performance and the high-temperature cycle performance of the sodium ion battery can be remarkably improved.

A positive electrode mixture layer in this secondary battery contains a first positive electrode active material having a particle fracture strength of 90 MPa or less and a second positive electrode active material having a particle fracture strength of 110 MPa or greater. The first positive electrode active material is a lithium transition metal complex oxide that contains Ni and Mn, and has a Co content ratio of 1 mol % or less. The second positive electrode active material is a lithium transition metal complex oxide that contains Ni and Co, and has a Co content ratio of 3 mol % or greater. Regarding the positive electrode mixture layer, the content of the first positive active material is at least 5 mass % but less than 50 mass % with respect to the combined mass of the first positive electrode active material and the second positive electrode active material.

The invention belongs to the technical field of new energy batteries, and relates to a lithium ion battery. The lithium ion battery comprises a positive plate, a negative plate, a diaphragm and a non-aqueous electrolyte, wherein the negative plate comprises a negative current collector and a negative material layer arranged on the negative current collector; the negative electrode current collector is a copper foil or a composite copper foil, and the negative electrode material layer comprises a silicon-containing material; the non-aqueous electrolyte comprises a non-aqueous organic solvent, a lithium salt, a first additive and a second additive; the first additive is 1, 3, 6-hexane trinitrile; the second additive comprises a compound as shown in a structural formula 1; the lithium ion battery satisfies the following conditions: 0.1 < = 10 (d + c) * a / b < = 100, 8 < = a < = 30, 20 < = b < = 800, 0.5 < = c < = 4, and 0.1 < = d < = 4. According to the lithium ion battery provided by the invention, the silicon negative electrode is stable in structure, high in energy density and stable in cycle performance.

The invention provides a non-aqueous electrolyte and a secondary battery. The non-aqueous electrolyte comprises an electrolyte salt, a non-aqueous organic solvent and an additive. The additive comprises a disulfonyl compound as shown in a structural formula I in the specification. Wherein the structure of R1 is shown as a formula I, a formula II, a formula III or a formula IV, R2 is halogen, and n is an integer of 1-4. The non-aqueous electrolyte contains a disulfonyl compound, can improve the dynamic performance and the cycle performance of the battery no matter in a fast charging system or a low-temperature system, and is suitable for a lithium ion battery and a sodium ion battery at the same time.

Provided are a non-aqueous electrolyte solution and a non-aqueous electrolyte solution battery which are capable of improving low-temperature (-30 DEG C) output characteristics (post-high-temperature storage resistance) after a high-temperature (70 DEG C) storage test and a post-overdischarge capacity retention rate after the high-temperature (70 DEG C) storage test in a well-balanced manner. A non-aqueous electrolyte solution containing: (I-1) a compound represented by general formula [1a] described in the description; and (I-2) at least one compound selected from the group consisting of a compound represented by general formula [1b] and a compound represented by general formula [1b '], and the content of (I-2) in the non-aqueous electrolyte solution is 10-25000 ppm by mass.

The invention discloses an aqueous electrolyte, a preparation method thereof and an aqueous battery, belongs to the technical field of aqueous batteries, and solves the problems of high polarization potential and short cycle life of an aqueous zinc ion battery in the prior art. The aqueous electrolyte comprises the following components: zinc salt, an additive and water; wherein the additive comprises sulfonate, acetate and halide. The aqueous battery adopting the aqueous electrolyte is long in cycle life and low in polarization potential.

The invention relates to a non-aqueous electrolyte composition for an electrochemical cell comprising a presodiation reagent which comprises one or more sacrificial sodium salts. The invention also relates to an electrochemical cell which has been presodiated using said non- aqueous electrolyte. Devices, methods, and uses including said non-aqueous electrolyte are also disclosed.

This invention relates to a biomass-based gel electrolyte membrane, its preparation method, and its application. The method includes preparing regenerated cellulose using a sol-gel method, adding sodium alginate and zinc chloride solution, and rapidly constructing a biomass-based composite gel electrolyte with a dual-network structure through metal ion coordination crosslinking. The biomass-based gel electrolyte membrane is obtained by adsorbing an aqueous electrolyte onto a gel membrane with a dual-network structure. This gel electrolyte membrane is then assembled with a zinc anode and a vanadium pentoxide cathode to obtain a zinc-ion battery. This invention features a simple method, readily available and inexpensive raw materials, easy product molding, convenient operation and control, and is conducive to industrial production. The prepared composite gel electrolyte membrane has a dual-network structure, exhibiting good stability, liquid retention capacity, and ionic conductivity, and demonstrates excellent cycle capacity and lifespan when applied to aqueous zinc-ion batteries.

The invention aims at providing an electrochromic device based on ammonium ion aqueous electrolyte and a preparation method and application of the electrochromic device, and belongs to the technical field of electrochromic devices. The transparent conductive glass is composed of a transparent conductive glass substrate layer, an ion storage layer, a hydrogel ion electrolyte layer, an electrochromic layer and a top transparent conductive layer. The electrolyte layer of the electrochromic device based on the ammonium ions adopts the hydrogel ion electrolyte, so that the migration process of the ammonium ions can be effectively promoted, and the long-cycle stability of the electrochromic device based on the ammonium ions is improved. The electrochromic device based on ammonium ions has wide application prospects in the fields of intelligent systems, intelligent windows, intelligent electronic products and the like.

Disclosed is a battery. The battery includes a positive electrode plate, a negative electrode plate, a non-aqueous electrolyte solution, and a separator. An electrolyte additive includes fluoroethylene carbonate. A termination tape of the positive electrode plate is disposed at a paste coating tail of the positive electrode plate. An area of a termination tape of the positive electrode plate is A cm2, a content of fluoroethylene carbonate is B2 wt %; and a width of the positive electrode plate is C cm; wherein a ratio of A to B2 is in a range of 0.5-5 and a ratio of A to Cis in a range of 1 to 3. The termination tape includes a substrate and a (meth)acrylic acid termination adhesive layer coated on a surface of the substrate. The battery can effectively improve high-temperature performance.

The present application relates to the technical field of lithium-ion batteries, and specifically relates to a cylindrical lithium-ion battery having improved high-temperature storage performance and high-temperature cycle performance. The cylindrical lithium-ion battery comprises a positive electrode, a negative electrode and a non-aqueous electrolyte solution, wherein the negative electrode comprises a negative electrode material layer containing a negative electrode active material, the negative electrode active material comprising a silicon-based material; and the non-aqueous electrolyte solution comprises a lithium salt, an organic solvent and an additive, the organic solvent comprising dimethyl carbonate, and the additive comprising a silane compound represented by structural formula 1. The cylindrical lithium-ion battery satisfies the following condition: 0.04≤(100-D)×F / S≤5, wherein 50≤D≤75, 0.01≤F≤0.5, and 5≤S≤20. In the cylindrical lithium-ion battery of the present application, the electrolyte solution contains the silane compound represented by structural formula 1 as an additive and dimethyl carbonate as the organic solvent, and therefore the problem of battery failure caused by the expansion of the silicon-based negative electrode can be improved, the service life of the battery can be prolonged, the battery is ensured to have good high-temperature performance, and the effect of inhibiting gas production during high-temperature storage is obvious.

The invention provides a secondary battery and an electric device. The secondary battery comprises a negative electrode plate and a non-aqueous electrolyte, the negative electrode plate comprises a negative electrode active material, the volume average particle size Dv50 of the negative electrode active material is 6-20 [mu] m, the non-aqueous electrolyte comprises an additive and a non-aqueous solvent, and the additive comprises a cyclic sulfate compound represented by formula (I); the non-aqueous solvent comprises ethylene carbonate; # imgabs0 #