64 results about "Lithium electrolyte" patented technology

The present invention discloses a method for heterogeneous catalytic synthesis of a key intermediate of a lithium bis(fluorosulfonyl)imide electrolyte (chemical name: bis(chlorosulfonyl)imide). The heterogeneous catalytic method comprises: reacting chlorosulfonic acid with chlorosulfonyl isocyanate under the action of a heterogeneous catalyst, filtering the catalyst directly after the reaction is completed, and directly applying it to the next batch of synthetic reactions, filtering the mother liquor and performing vacuum distillation to collect the target intermediate bis(chlorosulfonyl)imide fraction. Compared with the prior art, the present invention has the advantages of reusable catalyst, less residual waste, low cost, extremely high industrial application value, and is also in line with the upgrading of the green chemical industry alternative industry.

The invention discloses a battery. The battery comprises a positive plate and an electrolyte, the positive plate contains lithium iron phosphate; the electrolyte comprises vinylene carbonate and a silicon-based fluorophosphate compound as shown in a formula I: # imgabs 0 # formula I; in the formula I, R1, R2 and R3 are independently selected from any one of H, F, C1-C4 alkyl, C1-C4 fluoroalkyl, C2-C4 alkenyl, C2-C4 fluoroalkenyl, C2-C4 alkynyl, C2-C4 fluoroalkynyl, C5-C7 cycloalkane, R4 substituted phenyl and R5 substituted benzyl; in the formula I, R1, R2 and R3 are independently selected from any one of H, F, C1-C4 alkyl, C1-C4 fluoroalkyl, C2-C4 alkenyl, C2-C4 fluoroalkenyl, C2-C4 alkynyl, C2-C4 fluoroalkynyl, C5-C7 cycloalkane, R4 substituted phenyl and R5 substituted benzyl; r < 4 > and R < 5 > are independently selected from any one of C1-C4 alkyl groups, C2-C4 alkenyl groups, C2-C4 alkynyl groups, C1-C4 fluoroalkyl groups, C2-C4 fluoroalkenyl groups, C2-C4 fluoroalkynyl groups and F. The invention is beneficial to improving the cycle performance and the quick charge performance of the battery.

The invention discloses a method for measuring trace calcium and magnesium in a high-concentration lithium chloride electrolyte, which comprises the following steps: weighing analytically pure lithium chloride, stirring and dissolving with pure water to a constant volume, precipitating the solution by lithium hydroxide, adjusting the pH value, standing and filtering; and adsorbing through chelating resin to obtain a lithium chloride electrolyte, and then adding a proportionally standard solution. Diluting to the scale, and uniformly shaking; and finally, measuring the content of calcium and magnesium ions in the obtained constant-volume solution on an inductively coupled plasma emission spectrum. The invention provides the method for determining trace calcium and magnesium in the high-concentration lithium chloride electrolyte, the lower detection limit of the method is lower than that of the prior art, the test result repeatability is good, the accuracy is high, a high-purity reagent does not need to be additionally purchased as a matrix, the detection cost is reduced, a standard addition method is adopted, the sample pretreatment time is shortened, and the detection efficiency is improved.

The invention relates to a secondary battery and an electronic device. Specifically, the secondary battery comprises a positive electrode, a negative electrode and an electrolyte, the positive electrode comprises a positive electrode current collector and a positive electrode material arranged on the positive electrode current collector, the positive electrode material comprises lithium cobalt oxide, the electrolyte comprises methylene methanedisulfonate and allyl-1, 3-sultone, and relative to 100 parts by mass of the electrolyte, the content of the allyl-1, 3-sultone accounts for 100 parts by mass of the electrolyte, and the content of the allyl-1, 3-sultone accounts for 100 parts by mass of the electrolyte. The sum of the methylene methanedisulfonate and the allyl-1, 3-sultone is 0.02 to 3.5 parts by mass. According to the invention, the over-current and over-temperature safety of the secondary battery can be improved.

The present invention discloses a delocalized lithium electrolyte that breaks through the limitations of traditional dominant solvent structures, as well as its preparation method and application. The delocalized electrolyte delocalizes its microscopic solvent structure by combining lithium salts and solvents with differentiated physicochemical properties, thereby forming a diversified solvent structure. The delocalized solvent structure not only enriches the microstructure of the electrolyte, but also significantly improves the overall electrolyte performance through performance complementarity, thereby effectively improving the charge and discharge efficiency and cycle life of the lithium battery. The use of this electrolyte can achieve lithium secondary batteries with a capacity of more than 600Wh / kg, which has significant engineering application value.

The invention discloses a delocalized lithium electrolyte which breaks through the limitation of a traditional dominant solvent structure, and a preparation method and application of the delocalized lithium electrolyte. According to the delocalized electrolyte, the lithium salt and the solvent with different physicochemical properties are combined, so that the microcosmic solvent structure of the delocalized electrolyte is delocalized, and a diversified solvent structure is further formed. The solvent structure in the delocalized state not only enriches the microstructure of the electrolyte, but also significantly improves the overall electrolyte performance through performance complementation, thereby effectively improving the charge-discharge efficiency and cycle life of the lithium battery. By adopting the electrolyte, a lithium secondary battery of over 600Wh / kg can be realized, and the electrolyte has a remarkable engineering application value.

A lithium sulphur battery comprising a Li anode, a separator between the anode and cathode, a Li-containing electrolyte; and a sulphur-containing cathode; wherein the separator comprises a porous substrate carrying a metal-organic framework comprising at least two different metal ions one of which is an iron ion. Also, a process for the preparation of a cathode material for a Li—S battery comprising nucleating metal ions on a graphene oxide or reduced graphene oxide sheet such that the metal ions are chemically bound to the basal plane of the graphene oxide or reduced graphene oxide sheet; growing a metal-organic framework comprising said chemically bound metal ions by adding a polyfunctional ligand to form a metal organic framework bound to a reduced graphene oxide sheet (MOF@rGO); and infusing elemental sulphur into the metal organic framework to form S-MOF@rGO.

A secondary battery and an electronic apparatus. Specifically, the secondary battery comprises: a positive electrode, a negative electrode, and an electrolyte; the positive electrode comprises a positive electrode current collector and a positive electrode material provided on the positive electrode current collector; the positive electrode material comprises lithium cobalt oxide; the electrolyte comprises methylene methane disulfonate and propenyl-1,3-sultone; relative to 100 parts by mass of the electrolyte, the sum of methylene methane disulfonate and propenyl-1,3-sultone is 0.02 parts by mass to 3.5 parts by mass. The overcurrent and over-temperature safety of the secondary battery are improved.

According to the lithium supplement negative plate and the preparation method thereof, the lithium supplement amount required by negative electrode lithium supplement is calculated, and lithium is loaded through a substrate film, so that a lithium supplement composite belt with accurate lithium layer thickness for lithium supplement and high mechanical strength is prepared. The lithium composite belt is used for supplementing lithium to the negative electrode, so that accurate and uniform lithium supplementation of the negative electrode of the lithium ion battery can be realized. In addition, a main solvent of the lithium supplementing electrolyte is a low-boiling-point solvent with the boiling point smaller than 76 DEG C and larger than 20 DEG C, phase change heat absorption in the lithium supplementing process is achieved, and the ionic conductivity is reduced after local gasification; the electrolyte contains the lithium salt, and the lithium supplementing rate is controlled through the concentration of the lithium salt, so that the problem that the side reaction is aggravated due to high heating and high temperature rise during lithium supplementing of metal lithium is effectively avoided, and meanwhile, the electrolyte contains the interface film-forming additive, so that the stability of a negative electrode interface is promoted.

A novel lithium electrolyte sampler comprises a storage rack, the storage rack is arranged on a base, a high tray and a low tray are arranged on the left side and the right side of the storage rack, a stock solution tank is placed on the high tray, a sampling bottle is placed on the low tray, a U-shaped pipe is further arranged on the storage rack in an inverted mode, one end of the U-shaped pipe is inserted into the stock solution tank, and the other end of the U-shaped pipe is inserted into the sampling bottle. The other end of the U-shaped pipe is inserted into the sampling bottle, a ball valve is arranged on the right side of the upper end of the U-shaped pipe, an air blowing port is formed in the left side of the ball valve, the siphon principle is applied, the lithium electrolyte which is not in contact with air is obtained from the sampling bottle, the advantage that a sampled sample meets the test standard is achieved, and the technical problem that the sampled lithium electrolyte is not in contact with the air is solved.

The invention relates to the technical field of lithium battery electrolyte, and discloses lithium battery non-aqueous electrolyte and application of the lithium battery non-aqueous electrolyte in preparation of a high-state-of-charge positive electrode for a lithium-based reserve battery. The lithium battery non-aqueous electrolyte comprises a lithium electrolyte, an organic solvent, an adsorptive acidic auxiliary agent and an inorganic lithium salt, the molar concentration of the lithium electrolyte is 0.5-1.5 mol / L; the mass fraction of the adsorptive acidic auxiliary agent is 0.1-3 wt%; the concentration of the inorganic lithium salt is saturation concentration. Anion groups in the adsorptive acidic auxiliary agent in the electrolyte can be physically adsorbed on the surface of a positive electrode to form a uniformly coated sub-nano-scale CEI film, so that the surface of a positive electrode material is passivated, release of active oxygen on the surface of the positive electrode is reduced, and the surface structure stability and high-temperature and high-voltage cycling stability of the positive electrode material are improved; protons in the adsorptive acidic auxiliary agent can be complexed with the inorganic lithium salt, so that the solubility of the inorganic lithium salt in the ester-based electrolyte is increased; and the dissolved inorganic lithium salt can be induced to generate SEI rich in specified inorganic lithium salt on the surface of the negative electrode, so that the cycle performance of the lithium battery is improved.

A battery. The battery comprises a positive electrode sheet and an electrolyte; the positive electrode sheet comprises lithium iron phosphate; the electrolyte comprises vinylene carbonate and a silicon-based fluorophosphate compound represented by formula I: formula I; in formula I, R1, R2 and R3 are each independently selected from any one of H, F, C1-C4 alkyl, C1-C4 fluoroalkyl, C2-C4 alkenyl, C2-C4 fluoroalkenyl, C2-C4 alkynyl, C2-C4 fluoroalkynyl, C5-C7 cycloalkyl, R4 substituted phenyl, and R5 substituted benzyl, and R4 and R5 are each independently selected from any one of C1-C4 alkyl, C2-C4 alkenyl, C2-C4 alkynyl, C1-C4 fluoroalkyl, C2-C4 fluoroalkenyl, C2-C4 fluoroalkynyl, and F.

In accordance with the purpose(s) of the present disclosure, as embodied and broadly described herein, the disclosure, in one aspect, relates to the efficient and rapid synthesis of high-performance sodium ion electrolytes. The electrolytes have the general formula Nau+yNw-yMyLazCl3-vXv. The electrolytes possess superionic conductivity and display a low electronic conductivity, which ensures negligible electron transport contribution to the measured total conductivity and thereby enhancing safety when applied in energy storage devices. The synthesis of the electrolytes is significantly faster when compared to the synthesis of lithium electrolytes and the process can be scalable to produce large amounts of electrolytes.

The present application belongs to the field of energy storage, and specifically relates to a secondary battery and an electronic device, which further improves the discharge performance by adjusting the composition of the positive electrode and the electrolyte in the secondary battery. Specifically, the present application provides a secondary battery, which includes: a positive electrode, a negative electrode and an electrolyte, the positive electrode includes a positive electrode collector and a titanium dioxide material layer and a positive electrode material layer arranged on the positive electrode collector; the positive electrode material layer includes lithium iron phosphate and lithium manganese oxide, and the electrolyte includes ethylene glycol di(propionitrile) ether; the lithium iron phosphate is doped with boron, and the lithium manganese oxide is doped with copper and tin. The present application can improve the discharge performance of the battery.

The invention relates to a secondary battery and an electronic device. Specifically, the secondary battery provided by the invention comprises a positive electrode, a negative electrode and an electrolyte, the positive electrode comprises a positive electrode current collector, and an insulating layer and a positive electrode material layer which are arranged on the positive electrode current collector; the insulating layer comprises boehmite, the positive electrode material layer comprises lithium iron phosphate and lithium manganate, and the electrolyte comprises lithium difluorophosphate. According to the invention, the floating charging safety of the secondary battery can be improved, and the particle breaking change rate can be reduced.

The invention provides a formation process of a battery, the battery comprises an electrolyte, and the electrolyte comprises a first additive and a second additive; the first additive comprises fluorine-containing lithium electrolyte salt and / or sulfur-containing unsaturated ester; the second additive comprises one or more of a fluorine-containing compound, an unsaturated compound, a boron-containing compound, a sulfur-containing compound or a phosphorus-containing compound; the formation process comprises the step of carrying out constant-voltage charging at the charging voltage of 2.5 V to 4.1 V. The low-temperature discharge performance, the rate capability, the high-temperature storage performance and the like of the battery can be improved at the same time.

The utility model provides a sampler and relates to the technical field of metal lithium electrolyte. The sampler comprises a sample accommodating tube, an inlet tube and an operating rod, the sample containing tube is provided with an inner chamber. The inlet pipe is installed at one end of the sample containing pipe and communicated with the inner cavity. One end of the operating rod is movably arranged in the inner cavity, and the other end of the operating rod is used for being embedded into the inlet pipe to block the inlet pipe and being separated from the inlet pipe to open the inlet pipe, so that the electrolyte can enter the inner cavity through the inlet pipe. The sampler can be used for effectively and accurately sampling electrolytes at different positions and at different depths of the electrolytic cell, and the sampling efficiency and quality can be improved.

The invention belongs to the field of energy storage, and particularly relates to a secondary battery and an electronic device, and the discharge performance is further improved by adjusting the components of a positive electrode and an electrolyte in the secondary battery. Specifically, the secondary battery provided by the invention comprises a positive electrode, a negative electrode and an electrolyte, the positive electrode comprises a positive electrode current collector, and a titanium dioxide material layer and a positive electrode material layer which are arranged on the positive electrode current collector; the positive electrode material layer comprises lithium iron phosphate and lithium manganate, and the electrolyte comprises ethylene glycol di (propionitrile) ether; the lithium iron phosphate is doped with a boron element, and the lithium manganate is doped with a copper element and a tin element. The discharge performance of the battery can be improved.

In accordance with the purpose(s) of the present disclosure, as embodied and broadly described herein, the disclosure, in one aspect, relates to the efficient and rapid synthesis of high-performance sodium ion electrolytes. The electrolytes have the general formula Nau+yNw−yMyLazCl3−vXv. The electrolytes possess superionic conductivity and display a low electronic conductivity, which ensures negligible electron transport contribution to the measured total conductivity and thereby enhancing safety when applied in energy storage devices. The synthesis of the electrolytes is significantly faster when compared to the synthesis of lithium electrolytes and the process can be scalable to produce large amounts of electrolytes.

The utility model relates to the technical field of lithium electrolysis automatic lithium collection structures, in particular to a lithium electrolysis automatic lithium collection structure which comprises an electrolytic tank, the electrolytic tank is used for containing lithium electrolyte, two sliding rails are arranged on one side of the electrolytic tank, the upper ends of the sliding rails are slidably connected with a lithium collection frame plate, two electric telescopic rods are fixedly installed on one side of the electrolytic tank, and the two electric telescopic rods are fixedly connected with the lithium collection frame plate. A groove is formed in one side of the electric telescopic rod, a spring is fixedly installed in the groove, a guide column is fixedly installed on one side of the spring, a scraping plate is fixedly installed on one side of the guide column, a controller is fixedly installed at the front end of the electrolytic tank, and positive plates are arranged on the two sides of the electrolytic tank; a guide plate is fixedly mounted at the rear end of the electrolytic tank, a T-shaped groove is formed in the upper end of the guide plate, and an electric telescopic plate is arranged above the guide plate; according to the automatic lithium collection structure for lithium electrolysis, automatic lithium collection is realized, and the efficiency is high.

The invention relates to a preparation method of a solid electrolyte, in particular to a preparation method of a high-dielectric-constant fiber-reinforced solid electrolyte. The method comprises the following steps: 1, preparing barium strontium titanate nanofibers; and 2, preparing the fiber-reinforced solid electrolyte. The barium strontium titanate nanofiber skeleton is prepared by an electrostatic spinning method and is used for constructing the quasi-solid electrolyte; the barium strontium titanate nanofiber skeleton has a self-supporting stable structure and a high specific surface area, the contact area between the BST and the poly (vinylidene fluoride-co-hexafluoropropylene) / lithium bis (fluorosulfonyl) imide electrolyte is remarkably increased, and the particle aggregation phenomenon is avoided, so that the electrochemical performance of the electrolyte is remarkably improved. Especially, BST as a ferroelectric has special electrical properties, is helpful for improving the interface stability and reducing the interface impedance in a battery, further improves the migration rate of lithium ions in an electrolyte, has excellent electrochemical properties, and can meet the requirements of high energy density and safety in the future.

The invention provides a carbon-based coated composite copper oxide flexible electrode material and a preparation method and application thereof. The copper oxide and cuprous oxide composite material is prepared in situ through thermal oxidation of foamy copper, and then the surface of the copper-based material is coated with the self-polymerized carbon-based material. The electrode material, a ternary all-lithium electrolyte and a lithium-silicon alloy negative electrode form a single thermal battery, the open-circuit voltage of the single thermal battery is 2.5 V-2. 8V, the open-circuit voltage of the single thermal battery is 2.1 V-2. 3V, no obvious voltage peak exists, the discharge voltage is stable, the discharge duration is longer than 80min when the cut-off voltage is 1.4 V under the conditions of 500 DEG C and 50mA constant-current discharge, and the single thermal battery is suitable for a long-life thermal battery. The conductivity of copper oxide is improved through carbon-based material coating, and the flexible electrode is not prone to fragmentation and suitable for being applied to a high-voltage long-service-life thermal battery in an extreme environment.

The invention discloses a fractal porous silicon-based additive for a lithium iron phosphate electrolyte, and belongs to the technical field of battery electrolyte additives. The additive solves the problems of low ion transmission efficiency and high interface impedance caused by lack of mathematical model guidance in structural design and difficulty in consideration of electrolyte storage, rapid and selective transmission of a traditional single or two-stage pore structure. An inorganic oxide skeleton is adopted to construct a three-dimensional fractal hierarchical porous structure with a three-level pore (90-110 nm, 8-12 nm and 2-4 nm) network, the pore diameter ratio is about (90-110): (8-12): (2-4), the fractal dimension is 2.3-2.5, the porosity is 0.45-0.65, and the specific surface area is 350-450 m / g. The surface of the catalyst is subjected to hierarchical selective modification, first-stage and second-stage pore channels are rich in anion selective groups, third-stage pore channels are rich in cation selective groups, and the selectivity ratio of # imgabs0 reaches 1.6-1.8. A three-stage construction strategy of coordination of a hard template, a soft template and a molecular template is adopted, and structural regulation and control are realized through step-by-step calcination and graded modification. The method is applied to the lithium iron phosphate electrolyte.

The invention relates to a composite polymer electrolyte for a lithium air battery and a preparation method thereof, and belongs to the technical field of composite materials. The composite polymer electrolyte for the lithium air battery is prepared by taking a self-made conductive polymer, polyoxyethylene, aerogel filler and lithium electrolyte as raw materials; the preparation method comprises the following steps: dissolving a conductive polymer, polyoxyethylene and a lithium electrolyte with an organic solvent, stirring and mixing to obtain a composite polymer electrolyte solution, adding an aerogel filler into the composite polymer electrolyte solution, carrying out ultrasonic dispersion to obtain a gel polymer electrolyte, and finally immersing a battery diaphragm into the gel polymer electrolyte. The composite polymer electrolyte for the lithium air battery prepared by the preparation method disclosed by the invention is more compact in structure and small in internal resistance, and the cycling stability of the battery can be effectively improved.

The invention discloses a lead-lithium battery and a preparation method thereof, and relates to the technical field of battery preparation. Lead powder is prepared by lead blocks; lead paste is prepared; positive grids and negative grids are prepared; the positive grids and negative grids are coated; a double-conductive crystal lithium electrolyte is prepared; the surface is dried after acid sprinkling operation to obtain an intermediate positive plate and an intermediate negative plate; solidification treatment is performed; slices are cut and slices are ground, thereby obtaining a finished positive plate and a finished negative plate; after assembly, a double-conductive crystal lithium electrolyte is injected to obtain an intermediate lead-lithium battery; and an internal formation process is used to form a lead-lithium battery. Adding double-conductive crystal lithium material and controlling the pH value during the paste is conducive to the smooth formation of more 4BS. The addition of double-conductive crystal lithium material changes the plate group. The larger the surface area of ​​the electrode material, the more ions are adsorbed, the stronger the energy storage capacity, the reasonable pore size distribution and high conductivity, the good conductivity of the electrode material, the improved utilization rate of active substances, and the greatly extended battery life.

A lithium ion conductor includes a compound of Formula 1:Li7−a*α−(b−4)*β−xMaαLa3Zr2−βMbβO12−x−δXxNδ  Formula 1wherein in Formula 1,Ma is a cationic element having a valence of a,Mb is a cationic element having a valence of b, andX is an anion having a valence of −1,wherein, when Ma comprises H, 0≤α≤5, otherwise 0≤α≤0.75, andwherein 0≤β≤1.5, 0≤x≤1.5, (a*α+(b−4)β+x)>0, and 0<δ≤6.

Disclosed herein is a battery (e.g., a Li-S battery), comprising: an anode; a cathode comprising sulfur; a Li-containing electrolyte; and a separator between the anode and the cathode, wherein the cathode is coupled to or coated with nanoparticles having a composition according to Formula (I), and / or the separator is coated with nanoparticles having a composition according to Formula (I): Bi x Gd 1-x Fe y Ni 1-y O 3 , wherein 0.50 ≤ x < 1.00 and 0.50 ≤ y < 1.00. Batteries according to the present disclosure show enhanced specific capacity and capacity retention.

The present application relates to the field of lithium ion batteries, and provides a lithium supplement electrolyte, a lithium supplement electrode and a lithium ion battery, all of which comprise a lithium supplement additive; the oxidation of the lithium supplement additive nitrite in the charging process can make lithium ions in the battery insert into the negative electrode, supplement the lithium ions lost in the lithium ion battery due to the formation of a solid electrolyte interface film, and improve the cycle life and capacity of the battery; in addition, the nitrate produced by the decomposition of the nitrite can improve the structure of the solid electrolyte interface film generated subsequently, which is beneficial to improve the cycle life and stability of the battery; in addition, the nitrite of the present application can be produced on a large scale and is cheap, and therefore can be applied to industrial production. Compared with the prior art, the present application has the advantages of improving the cycle life and capacity of the battery and being applicable to industrial production.

The invention belongs to the related technical field of batteries, and discloses a high-concentration electrolyte as well as a preparation method and application thereof. The electrolyte comprises an organic solvent, a lithium salt and a non-lithium electrolyte salt, wherein the cation deposition potential of the non-lithium electrolyte salt is lower than the lithium ion deposition potential; and in the electrolyte, the concentration of the lithium salt is 0.1-1 mol / L, and the concentration of the non-lithium electrolyte salt is 1-6 mol / L. Based on a design strategy of a high-concentration electrolyte of mixed non-lithium metal cations of a potential difference-driven selective ion stabilization mechanism, under the condition of maintaining a low lithium salt concentration, the high-concentration electrolyte of the mixed non-lithium metal cations is obtained; positions of other non-lithium electrolyte salts which are low in cost and rich in resources and have deposition potentials lower than Li < + >-negative electrode reaction potentials are used for replacing part of Li < + > in the high-concentration electrolyte, so that the unique solvation structure advantage of the high-concentration electrolyte is reserved, and meanwhile, side reactions caused by introduction of heterogeneous cations are avoided; therefore, cost optimization and further improvement of battery performance are realized.

The invention belongs to the technical field of battery materials, and discloses an ultrathin and high-strength diaphragm as well as a preparation method and application thereof. The diaphragm comprises a base layer and a supporting layer, the supporting layer comprises a high polymer material or inorganic ceramic nanofiber, a surfactant and an antistatic agent; the base layer comprises inorganic nano ceramic particles and polyvinylidene fluoride; the inorganic nano ceramic particles are selected from at least one of an oxygen-containing substance of aluminum, an oxygen-containing substance of magnesium, an oxygen-containing substance of silicon, an oxygen-containing substance of titanium and a lithium electrolyte. The composition of the supporting layer and the slurry layer is specifically selected, so that the thickness of the diaphragm prepared by the invention is less than 1.5 mu m, further less than 1 mu m and even less than 0.6 mu m, and the tensile strength of the diaphragm is greater than 5.5 MPa.