2354results about "Organic electrolytes" patented technology

A positive electrode material of the present disclosure includes: a positive electrode active material; and a first solid electrolyte material coating at least partially a surface of the positive electrode active material, wherein the first solid electrolyte material includes Li, Ti, M1, and F, and the M1 is at least one element selected from the group consisting of Ca, Mg, Al, Y, and Zr.

Described herein are lithium-metal rechargeable electrochemical cells comprising a lithium-metal negative electrode, a positive electrode, and a liquid electrolyte. The liquid electrolyte comprises a core mixture and a diluent. The diluent comprises a fluorinated ether. The core mixture comprises a set of salts and a set of solvents. The set of solvents comprises a pyrrolidinium-containing ionic liquid and a molecular solvent. The molecular solvent is a non-fluorinated ether, for example including but not limited to 1,2-dimethoxyethane. In some examples, the electrolyte further comprises an electrolyte additive, for example including but not limited to tris(trimethylsilyl)phosphate. In some examples, the set of salts comprises one or more imide-containing lithium salts. In some examples, the set of salts comprises lithium bis(fluorosulfonyl)imide and an additional salt and the mole fraction of lithium bis(fluorosulfonyl)imide in the set of salts is 0.5 or greater.

The application relates to a cylindrical battery monomer, a battery and a power utilization device. The cylindrical battery monomer comprises electrolyte, an electrode assembly and a shell. The shell contains the electrolyte and the electrode assembly. The electrolyte comprises an electrolyte salt, and the electrolyte salt comprises a hexafluorophosphate. The shell comprises a shell body and a film layer. The film layer is arranged on at least a surface of the shell body facing the electrode assembly. The base element of the film layer is a nickel element. The use reliability and the cycle performance of the cylindrical battery monomer in the embodiment can be improved.

The application provides a lithium ion battery and an electric device, the lithium ion battery comprising a positive electrode sheet and an electrolyte, an active substance in the positive electrode sheet comprising a phosphate lithium positive electrode material and a lithium nickel cobalt manganese oxide, the electrolyte comprising a positive electrode film former, a negative electrode film former and a lithium salt, the lithium salt comprising lithium hexafluorophosphate and a lithium bisfluorosulfonylimide salt, the lithium ion battery satisfying the following formula: wherein NL is a mass ratio of the lithium nickel cobalt manganese oxide and the phosphate lithium positive electrode material, S alt is a value of a molar concentration of the lithium hexafluorophosphate and the lithium bisfluorosulfonylimide salt in the electrolyte in mol / L, and A dd is a mass ratio of the positive electrode film former and the negative electrode film former. The application can adjust the ratio of the positive electrode film former and the negative electrode film former and the ratio of the high-heat-resistance lithium salt according to the mixing ratio of the ternary material doped in the lithium manganese iron phosphate or the lithium iron phosphate, so that the cycle performance of the battery is improved.

The invention provides a battery monomer, a battery device and a power utilization device. The battery monomer comprises an electrode assembly, the electrode assembly comprises a positive pole piece, a negative pole piece and a non-aqueous electrolyte, the positive pole piece comprises a positive current collector and a positive active layer arranged on the positive current collector, and the positive active layer comprises a positive lithium supplementing material; the non-aqueous electrolyte comprises an electrolyte additive as shown in a formula (I). The energy density, the cycle performance and the high-temperature storage performance of the battery are improved at the same time.

The application relates to an electrolyte, a secondary battery and a power device, wherein the components of the electrolyte comprise a functional compound shown in formula (1), T1-T3 are independently selected from any one of the following groups: alkyl with 1-10 carbon atoms, alkenyl with 2-10 carbon atoms, alkynyl with 2-10 carbon atoms and groups shown in formula (a)-(f); and at least one of T1-T3 is selected from the group shown in formula (a), and at least one is selected from the group shown in formula (b), (c), (d) or (e). The functional compound shown in formula (1) can capture oxidation products in the charging and discharging process of the electrolyte, improve the toughness of the formed SEI film, and further improve the cycle performance of the secondary battery.

The invention provides an additive composition, an electrolyte thereof and a battery. The additive composition comprises a first additive and a second additive, the first additive comprises a compound with a structure as shown in a formula 1, and the second additive comprises a silane additive. When the additive composition provided by the invention is applied to the electrolyte, the cycle performance and the high-temperature performance of the battery can be improved.

A preparation method for a dual-enhanced interface solid polymer electrolyte by means of step-by-step polymerization, the preparation method comprising: mixing a matrix monomer and a first photoinitiator to obtain a mixed slurry, and illuminating same to obtain a pre-polymerized slurry; adding a lithium salt and a second photoinitiator to the pre-polymerized slurry, mixing same to obtain a polymer slurry, dividing the polymer slurry into a first polymer slurry and a second polymer slurry, adding a nitrogen-containing functional monomer to the first polymer slurry to obtain a polymer slurry A, and adding a fluorine-containing functional monomer to the second polymer slurry to obtain a polymer slurry B; and pouring the polymer slurry A on a first face of a base membrane, performing a treatment on same, pouring the polymer slurry B on a second face of the base membrane, and performing a treatment on same, so as to obtain a stepwise-polymerized dual-enhanced interface solid polymer electrolyte. The solid polymer electrolyte is prepared by means of using a step-by-step polymerization method, thereby optimizing a positive electrode side interface and a negative electrode side interface, and realizing continuous large-scale production of a solid polymer electrolyte.

The present disclosure relates to an electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same. More specifically, the electrolyte solution contains the polymer compound represented by Formula 1, and thus can improve high temperature durability, stability, and lifetime characteristics of the lithium secondary battery.

The invention belongs to the technical field of lithium / sodium batteries, and particularly relates to a method for pre-embedding lithium / sodium into a battery. The preparation method comprises the following steps: firstly, preparing a lithium / sodium pre-embedded material of the lithium / sodium battery, namely putting a sodium salt of the material into an organic solvent, dropwise adding acid, stirring for reaction, extracting and drying, and evaporating the solvent to dryness; placing the product in deionized water, adding lithium salt, stirring for reaction, and evaporating the solvent to dryness; recrystallizing the solid by using ethyl acetate and dichloromethane; and drying the obtained solid powder to obtain a final material. Dissolving the prepared lithium / sodium pre-intercalation material in a battery electrolyte to realize lithium / sodium pre-intercalation of the battery; the sodium salt of the material takes organic sodium sulfinate as a skeleton, and side groups are substituted with different alkyl groups or aryl groups; the prepared lithium / sodium pre-embedded material is high in specific capacity, good in compatibility with a battery system and good in material stability; lithium / sodium pre-embedding is carried out on the battery through an electrolyte adding method, the lithium / sodium pre-embedding process is safe and convenient, the process is simple, the cost is low, and large-scale production can be realized.

The present disclosure relates to organic electrolyte solutions including organic electrolytes (e.g., aromatic imides, ferrocenes, spiro fused compounds, or cyclopropenium compounds), and redox flow batteries and systems including the same.

The application provides an electrolyte, a battery and a power utilization device, the electrolyte comprising an amide fluorine-containing monomer, the amide fluorine-containing monomer comprising a compound shown in formula 1, which is beneficial to inhibit decomposition of the electrolyte at high temperature and side reactions between the electrolyte and positive and negative electrode materials, improve the stability of the interface between the positive and negative electrode sheets and the electrolyte, and further improve the high-temperature storage electrochemical performance and safety performance of the battery.

The present disclosure relates to organic electrolyte solutions including organic electrolytes (e.g., aromatic imides, ferrocenes, spiro fused compounds, or cyclopropenium compounds), and redox flow batteries and systems including the same.

The present application relates to the technical field of batteries. Disclosed are a non-aqueous electrolyte solution and a secondary battery. The non-aqueous electrolyte solution includes a bicyclic sulfate compound and a bicyclic sulfite compound; and a content of the bicyclic sulfite compound in the non-aqueous electrolyte solution is 1 ppm to 500 ppm, based on a total mass of the non-aqueous electrolyte solution. The non-aqueous electrolyte solution can significantly improve high-temperature storage performance, low-temperature discharge performance, capacity exertion and capacity consistency of a secondary battery.

An electrolyte solution for a lithium secondary battery is provided, comprising a lithium salt, a nonaqueous organic solvent with at least 50% FSA by volume, and a silver (Ag) compound additive selected from AgHFB, AgPFP, or silver trifluoroacetate. The additive is present in an amount of about 0.05 wt % to 0.2 wt % to promote stable SEI layer formation and reduce lithium deposition overvoltage. The solution may also include a secondary additive such as calcium hydride (CaH2) or magnesium fluoride (MgF2) to further suppress lithium dendrite growth. The lithium secondary battery incorporating this electrolyte is designed to form a lithium metal layer with a thickness of 40 to 45 μm and a surface pore average diameter of less than 1 μm during the initial charging process, optimizing performance and stability.

An electrolyte for a rechargeable lithium battery and a rechargeable lithium battery including the same are provided. The electrolyte includes a non-aqueous organic solvent, a lithium salt, and an additive. The additive includes a first compound represented by Chemical Formula 1 and a second compound represented by Chemical Formula 2.

The application provides a preparation method of sodium bisfluorosulfonimide, which comprises the following steps: (1) sulfuryl fluoride and hexamethylsilazane are reacted in an inert atmosphere to obtain a crude product, and the crude product is subjected to gas phase separation to obtain bisfluorosulfonimide; (2) the bisfluorosulfonimide obtained in the step (1) is reacted with sodium fluoride to obtain the sodium bisfluorosulfonimide. The sulfuryl fluoride and the hexamethylsilazane are used as raw materials to prepare the bisfluorosulfonimide by one-step method, the cost is reduced, and the production safety is improved, then the sodium bisfluorosulfonimide is prepared by ion exchange reaction of the bisfluorosulfonimide and sodium fluoride, the three wastes and solvent use are reduced, the impurities are reduced, and the production safety and product quality are improved.

The present invention relates to a sulfone compound-based electrolyte and a secondary battery including the sulfone compound-based electrolyte. The secondary battery according to the present invention can suppress gas generation in high temperature or thermal runaway environments or generate non-flammable gas to reduce the risk of ignition or explosion.

The present invention pertains to an anode-less lithium ion battery comprising a) a cathode comprising a cathode current collector and a cathode electro-active material on the cathode current collector; b) an anode current collector; c) a liquid electrolyte composition between the a) cathode and the b) anode current collector; and d) a separator, wherein the c) liquid electrolyte composition comprises i) at least 70% by volume (vol %) of a solvent mixture with respect to the total volume of the electrolyte composition, comprising at least one fluorinated ether compound and at least one non-fluorinated ether compound, and ii) at least one lithium salt.

The invention provides a non-aqueous electrolyte, a secondary battery and an electric device. The non-aqueous electrolyte comprises an additive, the additive comprises a cyclic sulfate compound with a structure as shown in a general formula (I), R1, R2, R3, R4, R5 and R6 are respectively and independently selected from any one of a group with a structure as shown in a general formula (II), a hydrogen atom, a halogen atom, C1-C6 alkyl, C1-C6 halogenated alkyl, C1-C6 alkoxy, C1-C6 halogenated alkoxy, C2-C6 alkenyl, C2-C6 ester group, cyano and sulfonic acid group, and R1, R2, R3, R4, R5 and R6 are respectively and independently selected from any one of hydrogen atom, halogen atom, C1-C6 alkyl, C1-C6 halogenated alkyl, C1-C6 alkoxy, C1-C6 halogenated alkoxy, C2-C6 alkenyl, C2-C6 ester group, cyano and sulfonic acid group. And n1, n2 and n3 are respectively and independently any integer from 0 to 2. The general formula (I) is a general formula (II).

An electrolyte for sodium ion batteries can comprise a salt comprising one or more of sodium bis (fluoro sulfonyl) imide (NaFSI) salt, NaOTf, NaTFSI, NaBF4, NaPFe, and NaCICh, and an electrolyte solvent comprising at least one carboxylate ester as a dominant solvent. A sodium ion battery cell (100) can comprise the electrolyte (140) having a salt comprising one or more of NaFSI salt, NaOTf, NaTFSI, NaBF4, NaPFe, and NaC104, and an electrolyte solvent comprising at least one carboxylate ester as a dominant solvent. The battery cell (100) can also include an anode (130) in electrical contact with the electrolyte (140) and a cathode (150) in electrical contact with the electrolyte (140). A casing (120) can enclose the electrolyte (140), the anode (130), and the cathode (150) sufficient to prevent oxygen and moisture from entering the casing (120).

The invention provides a pre-embedding agent which takes organic sulfinate as a framework and is used for pre-embedding lithium or sodium, a pre-embedded lithium positive electrode, a pre-embedded sodium positive electrode, a secondary battery and a method for pre-embedding lithium or sodium by using the pre-embedding agent. The pre-intercalation agent provided by the invention has the advantages of high specific capacity, good stability, no residue and good compatibility with a battery system, and can be well suitable for lithium or sodium ion secondary batteries. The lithium or sodium pre-embedding method is safe and convenient in pre-embedding process, simple in process, low in cost and capable of realizing large-scale production.

The invention relates to the technical field of batteries, in particular to a high-voltage lithium cobalt oxide / silicon carbon system lithium ion battery electrolyte, a lithium ion battery, a battery module, a battery pack and an electric device. The high-voltage lithium cobalt oxide / silicon carbon system lithium ion battery electrolyte comprises a non-aqueous organic solvent, a lithium salt and functional additives, the functional additives comprise a lithium salt additive, a first additive, a second additive and a third additive, the first additive is selected from unsaturated sulfonate additives, the second additive is selected from unsaturated sulfonate additives, and the third additive is selected from unsaturated sulfonate additives. The second additive is selected from unsaturated disiloxane additives, and the third additive is selected from fluoro-carbonic ester additives. The components of the electrolyte cooperate with each other, so that a stable and compact solid electrolyte interface can be formed on the surfaces of a positive electrode and a negative electrode, side reaction of the electrolyte on the surface of a pole piece is effectively inhibited, silicon-carbon negative electrode expansion and positive electrode transition metal dissolution are inhibited, the stability of the interface in the cycle process is improved, and the cycle performance of the lithium ion battery is effectively improved.

The present invention provides a non-aqueous electrolyte comprising a lithium salt, an organic solvent, and an additive, the additive comprising a compound represented by a specific chemical formula. The non-aqueous electrolyte of the present invention contains an additive that is excellent in protecting the electrode film and in scavenging oxygen, and can improve both the cycle characteristics and resistance characteristics of a lithium secondary battery containing the non-aqueous electrolyte.

Battery cell, characterized in that it comprises an electrode assembly and an electrolyte solution, wherein the electrode assembly comprises a positive electrode plate, a separating film and a negative electrode plate arranged one above the other, wherein the positive electrode plate comprises a positive current collector and a positive active material layer arranged on at least one side of the positive current collector, wherein the positive current collector comprises a positive current collector section and a positive electrode tab, the positive electrode tab being arranged at at least one end of the positive current collector section along the longitudinal direction of the electrode assembly, wherein the negative electrode plate comprises a negative current collector and a negative active material layer arranged on at least one side of the negative current collector.the negative current collector comprises a negative current collector section and a negative electrode tab, wherein the negative electrode tab is arranged at at least one end of the negative current collector section along the longitudinal direction of the electrode assembly; , wherein the positive active material layer comprises positive active material, the positive active material comprises lithium phosphate with olive stone structure; wherein the positive active material layer has a size of 300 mm to 950 mm along the longitudinal direction of the electrode assembly; wherein the size of the negative active material layer along the longitudinal direction of the electrode assembly is larger than the size of the positive active material layer, the difference between the size of the negative active material layer and the size of the positive active material layer is OH1, wherein OH1 is greater than 1 mm and less than 5 mm, wherein the size of the negative active material layer along the transverse direction of the electrode assembly is larger than the size of the positive active material layer, the difference between the size of the negative active material layer and the size of the positive active material layer is OH2, wherein OH2 is greater than 1 mm and less than or equal to 4 mm; wherein the electrolyte solution in question comprises a solvent and a lithium-containing electrolyte salt, wherein the solvent comprises a carboxylic acid ester solvent and the lithium-containing electrolyte salt comprises a fluorosulfonylimide lithium salt, wherein the mass fraction of the carboxylic acid ester solvent, based on the total mass of the electrolyte solution, is 8% to 57% and the mass fraction of the fluorosulfonylimide lithium salt is 3% to 8%.

A secondary battery, comprises at least two electrode plates, wherein at least one electrode plate comprises an intra-plate electrolyte, the intra-plate electrolyte comprises an intra-plate gel electrolyte and an intra-plate electrolytic solution, and the ratio RW of the mass of an electrolyte salt in the intra-plate gel electrolyte to the mass of an electrolyte salt in the intra-plate electrolytic solution satisfies 1<RW<9.

This disclosure provides redox cyclable molecules for energy storage. These molecules belong to either the 4H-pyran-4-ylidene family or include a six-membered aromatic ring with one nitrogen atom at position 1 (pyridinium family) or two nitrogen atoms at positions 1 and 4 (pyrazinium family) or at positions 1 and 3 (pyrimidinium family). Molecules in these families are used as analytes in redox flow batteries.

A battery includes a positive electrode plate, a negative electrode plate, and an electrolyte solution. The negative electrode plate includes a negative electrode current collector including a copper foil and a negative electrode active material layer including a negative electrode active material which including a silicon-based active material, the electrolyte solution includes lithium bis(trifluoromethanesulfonyl)imide; and the battery satisfies following relationship: B−10A−C / 10+3≥0; A is a grain size of copper foil, in a unit of m; B is a mess percentage of lithium bis(trifluoromethanesulfonyl)imide in the electrolyte solution, in a unit of wt %; C is a mass percentage of the silicon-based active material in the negative electrode active material, in a unit of wt %, and C≤50. The battery may significantly alleviate silicon negative electrode expansion while enhance the kinetic performance and cycling stability of the battery under room-temperature.

The present disclosure relates to a non-aqueous electrolyte comprising a lithium salt, an organic solvent, and an additive, wherein the additive includes a cyclic siloxane compound represented by a specific Formula.

Provided herein is an electrolyte composition for a lithium-ion battery, the composition comprising: (a) 18-35 wt% of lithium salt; (b) 1-25 wt% of solvent additive; and (c) 45-80 wt% of solvent. The total amount of (a), (b) and (c) is less than or equal to 100 wt% of the electrolyte composition. The lithium salt comprises lithium bis(fluorosulfonyl)imide (LiFSI), lithium 4,5-dicyano-2-(trifluoromethyl)imidazole (LiTDI) and lithium difluoro(oxalato)borate (LiDFOB). The solvent additive comprises one or more fluorinated and / or unsaturated carbonate compounds. The solvent comprises a cyclic carbonate. Also provided is an electrochemical cell comprising the electrolyte composition, an electrochemical energy storage device comprising the electrochemical cell, and uses associated with the electrolyte composition.