1226results about "Organic electrolytes" patented technology

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.

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.

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 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.

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.

The present application provides a secondary battery. The secondary battery includes an electrolyte solution and a positive electrode. The electrolyte solution contains an organic lithium salt. The positive electrode includes a positive electrode film layer. The energy density per unit area of the positive electrode film layer on a single side is 18-37 mWh / cm2, and optionally 18-35.7 mWh / cm2. Through the cooperation of the electrolyte solution and the positive electrode, the energy density and the dynamic performance of the battery are both improved.

Disclosed herein is a design for an electrochemical energy-storage cell that can withstand high pressure environments. The cell has a gas-tight cell housing that encloses an electrolyte in contact with an electrode assembly. The cell housing defines a cell volume. A pressure-equalizing member is connected to the cell housing and constructed to displace a portion of the cell volume to equalize a pressure differential between an external pressure on the cell and an interior pressure of the cell. The electrolyte remains in a liquid or gas phase when the pressure-equalizing member displaces the portion of the cell volume and equalizes the pressure differential.

Disclosed are novel electrolytes, and techniques for making and devices using such electrolytes, which are based on compressed gas solvents. Unlike conventional electrolytes, disclosed electrolytes are based on “compressed gas solvents” mixed with various salts, referred to as “compressed gas electrolytes.” Various embodiments of a compressed gas solvent include a material that is in a gas phase and has a vapor pressure above an atmospheric pressure at room temperature. The disclosed compressed gas electrolytes can have wide electrochemical potential windows, high conductivity, low temperature capability and / or high pressure solvent properties. Examples of a class of compressed gases that can be used as solvent for electrolytes include hydrofluorocarbons, in particular fluoromethane, difluoromethane, tetrafluoroethane, and pentafluoroethane. Also disclosed are battery and supercapacitor structures that use compressed gas solvent-based electrolytes and techniques for constructing such energy storage devices. Techniques for electroplating difficult-to-deposit materials using compressed gas electrolytes as an electroplating bath are also disclosed.

A non-aqueous electrolyte comprises a lithium salt, an organic solvent, and an additive, wherein the additive includes a compounds represented by Formula 1, and such non-aqueous electrolyte may be capable of suppressing the degradation of the positive electrode, reducing side reactions between the positive electrode and the electrolyte, and forming a stable SEI film on the negative electrode, thereby improving high-temperature cycle properties and high-temperature storage properties:wherein all the variables are described herein.

To provide a lithium ion battery with improved cycle performance.SOLUTION: The battery comprises an electrolyte and a positive electrode plate, wherein the electrolyte comprises lithium hexafluorophosphate as a lithium salt, and a mass content of the lithium hexafluorophosphate is 15% to 20% of a total mass of the electrolyte, the positive electrode plate comprises a positive current collector and a positive electrode film disposed on at least one side of the positive current collector and comprising a positive active material, and the positive active material comprises a compound having a molecular formula of LidNiaCobMncM (1-a-b-c) Qz; 0 <d ≤ 2.1, 0.6 <a <1, 0 <b <1, 0 <c <1, and 0.6 <a + b + c <1, 1.8 ≤ z ≤ 3.5, the element M includes at least one of B, Mg, Al, Si, P, S, Ca, Sc, Ti, V, Cr, Fe, Cu, Zn, Sr, Y, Zr, Nb, Mo, Cd, Sn, Sb, Te, Ba, Ta, W, Yb, La, and Ce, and the element Q includes at least one of O and F.SELECTED DRAWING: None

The lithium battery and electrical device are described. The lithium battery includes a positive electrode plate, a negative electrode plate, a separator, and an electrolyte. The negative electrode plate includes a current collector and a negative electrode active material layer provided on the surface of the current collector. The electrolyte includes a lithium salt, an organic solvent, and an additive, and the additive includes a fluorinated carbonate and a nitrile material. The negative electrode active material layer has a thickness D of 1 μm. The particle size corresponding to when the cumulative volume percentage of the negative electrode active material in the negative electrode active material layer reaches 50% is D. v 50 μm, and the particle size corresponding to when the cumulative volume percentage of the negative electrode active material in the negative electrode active material layer reaches 90% is D v 90 μm. Based on the total mass of the electrolyte, the mass content of the fluorinated carbonate is W0% and the mass content of the nitrile material is W1%. The lithium battery has a coefficient of performance k = (2D1 / D v 90+D v 50) / (W0+W1), where k is in the range of 0.5 to 3.

This disclosure relates generally to battery cells, and more particularly, electrolyte additives for use in lithium-ion battery cells.

An electrochemical device and an electronic device, by setting a non-active material layer (50) on the second surface (10b) of the single-face area (30) of the positive electrode current collector (10), while matching the electrolyte, the risk of abnormality of the positive electrode sheet (100) of the electrochemical device after the charge and discharge cycle is reduced, the risk of lithium precipitation of the negative electrode sheet (200) is reduced, thereby reducing the risk of failure of the electrochemical device in the charge and discharge cycle.

A secondary battery comprises a positive electrode plate, a negative electrode plate, and an electrolyte solution. The positive electrode plate comprises a positive electrode film layer. The positive electrode film layer contains a positive electrode active material. The electrolyte solution comprises a solvent, a lithium salt, and an additive. The additive includes a compound containing an isocyanate group. The mass fraction of the compound containing the isocyanate group in the electrolyte solution is a, with 11≤n / 10000a≤96600 where n=b×c×d; n is the real surface area of the positive electrode active material per unit apparent surface area; b is the BET specific surface area of the positive electrode active material, in cm2 / g; c is the mass fraction of the positive electrode active material in the positive electrode film layer; and d is the coating areal density of the positive electrode film layer.

The present invention relates to electrochemical devices and electronic devices. Specifically, the present invention provides an electrochemical device comprising a cell, the cell comprising a positive electrode, a negative electrode, an electrolyte, and a separator, the outermost electrode of the cell having a curved portion and a straight portion, the straight portion having a length L mm and a radius D mm, where L / D is 5≦L≦10, the electrolyte containing propylene carbonate, and the propylene carbonate content A % based on the mass of the electrolyte, where A % is 5≦A≦15. The electrochemical device of the present invention has significantly improved room temperature cycle performance.

The invention relates to the technical field of batteries, in particular to an electrolyte, a battery monomer, a battery device and an energy storage device. The electrolyte comprises a cyano siloxane compound shown in the formula, R1, R2, R3 and R4 independently comprise one of cyano, hydrogen, substituted or unsubstituted alkane, substituted or unsubstituted alkylene and substituted or unsubstituted alkyne, and at least two of R1, R2, R3 and R4 comprise cyano; r5, R6, R7, R8, R9 and R10 each independently comprise a substituted or unsubstituted alkane group. The electrolyte provided by the invention has good stability at normal temperature and high temperature, and is not easy to decompose.

This invention relates to a lithium-ion battery electrolyte and a lithium-ion battery using the electrolyte. To address the problems of poor cycle performance and low safety performance of existing lithium batteries at high voltages, this invention provides a lithium-ion battery electrolyte comprising a lithium salt, additives, and a non-aqueous organic solvent. The lithium salt is lithium hexafluorophosphate and / or lithium bisfluorosulfonylimide, and the additives include tripyridyl phosphate compounds. Based on the combination of tripyridyl phosphate compounds and lithium salts, the cycle performance, overcharge capability, and high-temperature storage performance of the high-voltage battery are significantly improved simultaneously.

The invention describes a method for manufacturing a sodium-ion battery cell (1), comprising the steps of: providing an anode (A) and a cathode (K), inserting the anode (A) and the cathode (K) into a fluid-tight shell (2), and adding an additional electrolyte (EL-Z) to the shell (2), which contains as an additive a sodium salt (6) having an anion comprising a conjugated system of at least two aromatic compounds. The invention further describes a corresponding electrolyte (EL-Z) for a sodium-ion battery cell (1).

The invention relates to an electrolyte for a lithium-ion battery, comprising, in percent by weight relative to the weight of the electrolyte: - between 8% and 20% lithium salt which comprises at least a mixture of LiFSI and LiPF6, - between 0.5% and 1.5% methylene methane disulfonate, - a complementary additive, the weight percentage of which does not exceed 5%, - a sufficient quantity of a non-aqueous organic solvent. The invention also relates to a lithium-ion battery comprising said electrolyte.

The present disclosure relates to an electrolyte, and a lithium secondary battery including the electrolyte. An electrolyte according to the present disclosure may include a copolymer of an acrylic monomer and a fluoroacrylic monomer, and the fluoroacrylic monomer may include 7 or more fluorine atoms. A lithium secondary battery may include a cathode, an anode including an anode current collector, and an electrolyte according to the present disclosure disposed between the cathode and the anode.

The invention provides an electrolyte, a lithium iron manganese phosphate battery and an electric device. The electrolyte comprises a lithium salt and a solvent, the solvent comprises ethylene carbonate, propylene carbonate, ethyl methyl carbonate, fluorobenzene and a low-viscosity solvent in a volume ratio of (2-5): (2-5): (3-5): (3-5): (2-5). The high dielectric constants of ethylene carbonate and propylene carbonate improve the dissolving capacity of the electrolyte to lithium salt, and meanwhile, the molecular structure can form a stable interface layer on the surface of a positive electrode to inhibit migration and dissolution of manganese ions; due to the low viscosity characteristic of the low-viscosity solvent, the overall viscosity of the electrolyte is reduced, and the permeability of the porous positive electrode material is enhanced, so that the wettability is improved, and uniform de-intercalation of lithium ions is promoted; a physical adsorption protection layer can be formed on the surface of the positive electrode through the coordination effect of high-electronegativity fluorine atoms in fluorobenzene and manganese, and direct contact between manganese and electrolyte is further blocked.

The present invention may provide a cathode active material that exhibits excellent structural stability and lifespan retention rate even in a high-temperature environment where a battery is operating. In addition, the present invention may provide a cathode including an active material layer containing the cathode active material and provide a battery cell including the cathode. In addition, the present invention is aimed at providing a battery cell assembly including the battery cell. In addition, the present invention may provide an electric device including one or more selected from the group consisting of the battery cell and the battery cell assembly.

The invention relates to the technical field of batteries, and provides a battery monomer, a battery device and a power utilization device.The battery monomer comprises an electrolyte and an electrode assembly, the electrode assembly comprises a positive pole piece and a negative pole piece, and the negative pole piece comprises a negative current collector and a negative active material layer arranged on at least one side of the negative current collector; the negative electrode active material layer comprises carbon-coated graphite, and amorphous carbon is arranged on the surface of the carbon-coated graphite; the electrolyte comprises a solvent, and the solvent comprises linear carboxylic ester; in the first direction, the size of the negative electrode active material layer is larger than 130 mm, and the first direction is parallel to the gravity direction. According to the present invention, the carbon-coated graphite is adopted as the negative electrode active material, and is matched with the electrolyte containing the linear carboxylic ester, such that the problems of electrolyte local aggregation and low heat dissipation efficiency in the high battery cell can be effectively improved so as to prolong the cycle life of the battery monomer.

A secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The electrolytic solution includes an anisole compound and a non-aqueous solvent. The anisole compound is represented by Formula (1). A molar ratio of the anisole compound to the non-aqueous solvent is 1.6 or greater.

A molecular design principle utilizes a steric hindrance effect to tune the solvation structures of Li+ ions. By substituting the methoxy groups on DME with larger-sized ethoxy groups, the resulting 1,2-diethoxyethane (DEE) has weaker solvation ability and consequently more anion-rich inner solvation shells, both of which enhance interfacial stability at cathode and anode. According to certain additional aspects, the present embodiments relate to a family of fluorinated- 1,2-diethyoxyethane (fluorinated-DEE) molecules that are readily synthesized in large scales to use as the electrolyte solvents. Selected positions on 1,2-diethyoxyethane (DEE, distinct from the diethyl ether are functionalized with various numbers of fluorine atoms through iterative tuning, to reach a balance between CE, oxidative stability, and ionic conduction. Paired with 1.2 M lithium bis(fluorosulfonyl)imide (LiFSI), these fluorinated-DEE-based, single-salt single-solvent electrolytes are thoroughly characterized. In addition, a family of fluorinated ethyl methyl carbonates are designed and synthesized. Different numbers of F atoms are finely tuned to yield monofluoroethyl methyl carbonate (F1EMC), difluoroethyl methyl carbonate (F2EMC) and trifluoroethyl methyl carbonate (F3EMC). The cycling behavior of several types of lithium-ion pouch cells were systematically investigated to understand the impact of fluorination degree.

The present disclosure relates to a method for manufacturing a solid-liquid hybrid electrolyte membrane, including the steps of: (S1) preparing a dispersion containing a plurality of polymer particles dispersed in a liquid electrolyte and a volatile organic solvent; (S2) applying the dispersion onto a substrate, followed by drying, to form a porous structure; and (S3) pressurizing the porous structure to obtain a solid-liquid hybrid electrolyte membrane, wherein the solid polymer particles in the porous structure are packed, while being in contact with one another, the porous structure includes a pore structure formed among the solid polymer particles, the liquid electrolyte surrounds the inside of the pores of the porous structure, the portions in which the solid polymer particles are in surface contact with one another, or the surfaces of the solid polymer particles, the content of the liquid electrolyte is 1-20 wt% based on the total weight of the solid-liquid hybrid electrolyte membrane, and the organic solvent has higher volatility as compared to the liquid electrolyte.

A battery, an electrolyte selection method, an energy-storage apparatus, and an electricity-consumption device are provided in the disclosure. The battery includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode, a separator, and a negative electrode which are stacked sequentially. The electrolyte at least infiltrates part of the electrode assembly, and the electrolyte contains a lithium salt. The positive electrode is obtained by disassembling the battery in a fully charged state, the positive electrode obtained and the electrolyte are assembled in a button cell, the button cell is subjected to a linear sweep voltammetry (LSV) test at a potential sweep rate of 0.1 mV / s, and a first peak current density a1 of the button cell satisfies a relationship: 0.1mAcm-2≤a1≤3mAcm-2. The battery herein has an excellent cycle performance and an excellent overcharge performance.

This invention provides a non-aqueous electrolyte and a lithium-ion battery. The non-aqueous electrolyte comprises a non-aqueous organic solvent, an electrolyte salt, and additives. The additives include compound A (structural formula I) and compound B (structural formula II). In the non-aqueous electrolyte of this invention, compound A is an unsaturated phosphorus-containing compound, and compound B is a carboxylic acid ester compound. Through the synergistic effect of the unsaturated phosphorus-containing compound and the carboxylic acid ester compound, a relatively complete SEI (Sediment Injection) membrane can be formed, providing a stable transport channel for lithium ions during cycling and storage. Furthermore, since the carboxylic acid ester may occupy positions in the SEI membrane, it prevents the phosphorus-containing compound from forming an excessively thick SEI membrane, thus ensuring a uniform SEI membrane thickness and shortening the lithium-ion transport distance. Therefore, through these two effects, the high-temperature storage, cycling, and low-temperature performance of the high-nickel ternary cathode material system battery under high voltage (≥4.35V) can be improved.

A method of preparing an ionic liquid includes the following steps. A halogen-containing compound is reacted with a first compound to form a second compound. The halogen-containing compound includes a halohydrocarbon, a sulfonyl halide, or a combination thereof. The first compound includes an amine compound having a tertiary amine group, a phosphine compound, or a combination thereof. The second compound includes a first quaternary ammonium salt, a first quaternary phosphonium salt, or a combination thereof. The second compound and a lithium salt are reacted in a microwave device to form a third compound. The third compound includes a second quaternary ammonium salt, a second quaternary phosphonium salt, or a combination thereof. Anions of the second compound and the third compound are different. A microwave power of the microwave device is 700 watts to 1400 watts.