17 results about "Ion mixing" patented technology

The invention discloses a positive electrode material and a preparation method thereof, a positive electrode plate, a battery and electric equipment, the positive electrode material is of a layered structure of alpha-NaFeO2, in an XRD spectrum, characteristic peaks (006) and (102) in bimodal distribution are formed at the position of 2 theta being 37-39 degrees, and characteristic peaks (018) and (110) in bimodal distribution are formed at the position of 2 theta being 64-66 degrees; after the positive electrode material is circulated for 80 times under the conditions of 25 DEG C, 3.0 V-4. 3V and 1.0 C / 1.0 C, the change value of the cell parameter c / a meets # imgabs0 #. The positive electrode material disclosed by the invention has a relatively good layered structure and shows good crystallinity; and the material is stable in structure, even if the material is circulated for 80 weeks, the Li / Ni ion mixing degree of the material is slightly increased, the influence on the change of a wafer layer of a layered structure is small, the damage to a crystal structure is small, and the circulation retention rate is good.

The invention provides a preparation method of an electron-ion mixed conductor sulfide electrolyte material, which is characterized by comprising the following steps: taking a sulfide solid electrolyte as an inner core, taking a two-dimensional transition metal layered material MXene as a surface coating layer, and coating the surface of the inner core with the two-dimensional transition metal layered material MXene, and carrying out ball milling and calcining to obtain the electron-ion mixed conductor sulfide electrolyte material. The two-dimensional transition metal layered material MXene is used as a surface coating layer, the air stability of the sulfide solid electrolyte is improved, calcination treatment is carried out, S in the sulfide solid electrolyte is combined with metal ions in MXene, the sulfide solid electrolyte has high electronic conductivity, the appearance of a space charge layer can be inhibited, and the performance of the sulfide solid electrolyte is improved. The electronic conductivity of the positive electrode is improved, the multiplying power of a battery cell is improved, the content of conductive carbon is reduced, and the intrinsic ion conductivity of sulfide electrolyte can be kept to the maximum extent.

The invention discloses a polyanion halide solid electrolyte material as well as a preparation method and application thereof. The chemical formula of the halide solid electrolyte material is Li < 3 > YCl < 6-2x > Br < x > I < x >, wherein 0 < x < 3. The chemical formula of the halide solid electrolyte material is Li < 3 > YCl < 5.8 > Br < 0.1 > I < 0.1 >, Li < 3 > YCl < 5.6 > Br < 0.2 > I < 0.2 >, Li < 3 > YCl < 5.4 > Br < 0.3 > I < 0.3 >, Li < 3 > YCl < 5.2 > Br < 0.4 > I < 0.4 >, Li < 3 > YCl < 5.0 > Br < 0.5 > I < 0.5 >, Li < 3 > YCl < 4.8 > Br < 0.6 > I < 0.6 >, Li < 3 > YCl < 4.6 > Br < 0.7 > I < 0.7 >, Li < 3 > YCl < 4.4 > Br < 0.8 > I < 0.8 >, Li < 3 > YCl < 4.2 > Br < 0.9 > I < 0.9 >, Li < 3 > YCl < 4.0 > The invention provides a series of Li3YCl6-2xBrxIx by taking economical and efficient Li3YCl6 as a main body and combining with an anion mixing strategy, the Li3YCl6-2xBrxIx has high ionic conductivity of 1.98 mS cm <-1 > and low activation energy of 0.257 eV, and has good compatibility with a Li4Ti5O12 (LTO) positive electrode and a Li-In alloy negative electrode. The construction of the anion mixed state not only can reduce the binding effect of an anion frame on Li < + > migration and improve the ionic conductivity, but also can soften anion crystal lattices and reduce the activation energy. More importantly, due to the introduction of I <->, a LiI self-limiting passivation interface layer is generated in situ, so that the stability of a Li interface is enhanced.

The invention provides an electron-ion mixed conductor solid electrolyte material as well as a preparation method and application thereof, and is characterized in that the electron-ion mixed conductor solid electrolyte material is compounded by embedding a sulfide solid electrolyte into a metal organic framework material serving as a framework, the electronic conductivity of the metal organic framework material is greater than 10 <-2 > S / cm. A metal organic framework material is used as a carrier of a sulfide solid electrolyte and is compounded with the sulfide solid electrolyte to form a mixed conductive ion-electron structure, and the mixed conductive ion-electron structure is fully mixed with a positive electrode active substance, so that the interface contact loss between the materials is favorably reduced, and the metal organic framework material can play a role of a conductive agent in the composite positive electrode; therefore, the use amount of the conductive agent in the composite positive electrode is reduced, and even the conductive agent is not needed, so that the use amount of auxiliary materials is reduced, the polarization of a battery cell is reduced, and the utilization rate of positive electrode active substances is improved.

The invention provides a high-nickel ternary material with gradient doping of high-valence elements, a preparation method of the high-nickel ternary material and a solid-state battery, and relates to the field of solid-state battery preparation. The high-nickel ternary material comprises high-valence elements, and the high-valence elements comprise Ta, W, Zr and Nb. Through gradient doping distribution design of Ta, W, Zr and Nb elements, collaborative optimization of high activity of the high-nickel ternary material in a core area and high stability of the high-nickel ternary material in a surface area is realized, the problems of particle breakage, ion mixing, interface impedance and the like are effectively relieved, and the requirements of the solid-state battery positive electrode material in high-performance application are met.

The invention discloses an electrode material of a sodion hybrid supercapacitor, a preparation method and a supercapacitor, and relates to the technical field of sodion energy storage devices, the preparation method of the electrode material comprises the following steps: S1, preparing a transition metal ion solution, the transition metal ions comprise one or more of Co < 2 + >, Mn < 2 + >, Ni < 2 + >, Fe < 2 + >, Fe < 3 + > and V < 4 + >, and the transition metal ions comprise one or more of Co < 2 + >, Mn < 2 + >, Ni < 2 + >, Fe < 2 + >, Fe < 3 + > and V < 4 + >; performing electrochemical constant-pressure deposition or alkali reaction precipitation to obtain corresponding transition metal hydroxides; and S2, in an alkaline liquid environment, performing electrochemical oxidation or oxidizing agent oxidation on the transition metal hydroxide obtained in the step S1 at room temperature to generate a corresponding transition metal oxyhydroxide, namely the electrode material. The transition metal oxyhydroxide with the layered semimetal property is rapidly prepared, rapid storage of sodium ions on an electrode is achieved, and the prepared supercapacitor has the advantages of ultra-long cycle life and excellent rate capability.

The invention relates to the technical field of conductor materials, in particular to an electron-lithium ion mixed conductor material and a preparation method thereof. According to the technical scheme, the sulfide solid electrolyte comprises a sulfide solid electrolyte core; the surface of the inner core is coated with the LiMS coating layer, M is at least one of V, Cr, Fe, Ni and Nb, the sulfide solid electrolyte is Li < 6-X > PS5-XCl < 1 + X >, x is greater than or equal to 0 and less than or equal to 0.6, and the thickness of the LiMS < 2 > coating layer is nanoscale. A novel electron-lithium ion mixed conductor material is successfully developed through an optimally designed in-situ reaction and preparation process, and the material can provide efficient ion and electron transmission paths in a positive electrode at the same time, significantly reduce interface impedance, improve the utilization rate of active substances, and improve the performance of a lithium ion battery. Therefore, the discharge capacity and the electrochemical performance of the all-solid-state battery are greatly improved.

The invention relates to the technical field of lithium ion battery positive electrode materials, in particular to a high-voltage precursor material and a preparation method thereof, a positive electrode material, a positive plate and a lithium ion battery. The chemical formula of the high-voltage precursor material is NixCoyMnzMw (OH) 2, y is more than or equal to 0.1 and less than or equal to 0.2, z is more than or equal to 0.2 and less than or equal to 0.4, x + y + z = 1, and w is more than or equal to 0.001 and less than or equal to 0.015; m is a doping element and comprises at least one of Mg, Al, Ce, Mo, B and Ta; the tap density of the high-voltage precursor material is greater than or equal to 1.90 g / cm < 3 >, and the specific surface area is greater than or equal to 10m < The precursor material has high tap density and high specific surface area at the same time, and when the positive electrode material prepared from the precursor material is used for a battery, the cycle performance is good under high voltage, the ion mixing degree is relatively low, and irreversible phase change is reduced; meanwhile, the precursor material is doped with the element M, so that the structural stability is good.

The invention discloses a method for repairing and improving a layered oxide positive electrode material of a waste lithium ion battery, which comprises the following steps of: (1) disassembling the waste lithium ion battery to obtain the layered oxide positive electrode material, and pretreating; (2) mixing and grinding the pretreated positive electrode material and a lithium salt, and performing primary calcination to obtain a primary sintered material; and (3) placing the primary sintered material in an ion mixed solution containing two of alkali metal ions, alkaline earth metal ions and rare earth metal ions for water bath ultrasonic treatment, cleaning, drying, and carrying out secondary calcination to obtain the repaired and improved layered oxide positive electrode material. The repaired and improved positive electrode material disclosed by the invention has excellent high-voltage cycle stability, and the safety performance of the lithium ion battery can be improved; the material can be directly applied to a positive pole piece of a lithium ion battery without secondary processing; the recycling method is simple, efficient, low in energy consumption, free of waste generation, green and environmentally friendly, and industrial production can be achieved.

The invention belongs to the technical field of batteries, and provides a doped high-nickel single-crystal positive electrode material and a preparation method and application thereof.The doped high-nickel single-crystal positive electrode material comprises strontium element doped single-crystal particles, the doping amount of the strontium element is 0.3%-3% of the total molar weight of nickel, cobalt and manganese elements, and the positive electrode material has the small average particle size of 1-3 m. The doping of the strontium element can change the crystal structure of the NCM, and is beneficial to improving the ion mixing and enhancing the stability of the structure, thereby improving the cycling stability. Meanwhile, the small-size single crystal particles are beneficial to further effectively inhibiting formation of microcracks, electrolyte is effectively prevented from permeating into the particles, and side reaction is inhibited. In addition, the increase of the oxygen vacancy formation energy and the reduction of the migration energy barrier in the strontium-doped high-nickel single-crystal NCM positive electrode material are both helpful for improving the electrochemical performance.

The invention provides an electron / ion double-conductor paste additive and a preparation method and application thereof, and belongs to the technical field of lithium batteries. According to the invention, the polymer with high ion conduction performance is grafted on the carbon material with high electron conduction performance, so that electron and ion mixed conduction is realized, and the rate capability of the battery cell is improved. Experimental results show that the initial charge specific capacity of a battery assembled by the electron / ion double-conductor slurry additive is 318.4-334.6 milliampere-hour / g, and the initial discharge specific capacity of the battery is 288.1-301.8 milliampere-hour / g.

The invention relates to a compact superconducting cyclotron for isotope production. The high-current ion beam generator comprises a high-charge-state ECR ion source and a high-current proton source, the high-charge-state ECR ion source generates a milliampere-level high-charge-state heavy ion beam, and the high-current proton source generates a milliampere-level proton beam and a hydrogen molecule ion beam. An inlet of the injection beam line is connected with the high-charge-state ECR ion source and the high-current proton source. And a low-energy high-current ion mixed beam generated by the high-current ion beam generator is transmitted to the accelerator through the injection beam line. And the accelerator is connected with two symmetrical lead-out beam lines through a lead-out channel of the accelerator, and the two lead-out beam lines are positioned on the two sides of the accelerator so as to lead out a high-energy strong-current heavy ion beam and a high-energy strong-current proton beam. The advantages of the heavy ion beam and the proton beam are considered, and the medical TAT isotope is produced more efficiently and safely.

The invention relates to a core-shell structure rare earth nano light-emitting probe and a preparation method and application thereof.The light-emitting probe comprises an inner core and one or more shell layers wrapping the inner core, the inner core structure is AREF4, the shell layer structure is AREF4 or CaF2, A is selected from one or more of alkali metal, and RE is a rare earth element; the core-shell structure rare earth nano luminescent probe is synthesized by a thermal injection core high-temperature thermal decomposition method. Compared with the prior art, the method has the advantages that the dissolution and ion mixing of the inner core can be inhibited, the doped ion distribution of the core-shell nanoparticles is optimized, and the structural stability and the luminescence property of the nanoprobe are improved.

The utility model relates to the technical field of deodorization devices, in particular to a combined plasma integrated deodorization device, which is characterized in that one side of an ion mixing box is provided with an equipment inlet, the other side of the ion mixing box is provided with a chemical filter material box, and the top of the chemical filter material box is provided with an ion generator; the ion generator is connected with the ion mixing box through a pipeline, the other side of the chemical filter material box is connected with the centrifugal fan through a pipeline, and the centrifugal fan is connected with the exhaust funnel through a pipeline. Discharged waste gas can be detected through the monitoring device so as to meet standard requirements, and meanwhile, transportation and installation are facilitated through integrated skid-mounted installation.

The invention discloses a method for removing nitrosamine in trifluralin, and belongs to the technical field of carbocyclic compound purification, the removal method comprises the following steps: primary purification of a trifluralin crude product, preparation of an ion mixed solution and photocatalytic decomposition; the photocatalytic decomposition method comprises the following steps: mixing preliminarily purified trifluralin with an ion mixed solution, adjusting the temperature of the solution to be 50-52 DEG C and the pH value to be 3.8-4.2, carrying out ultrasonic dispersion for 15-20 minutes to form a dispersion liquid, transferring the dispersion liquid to a photocatalytic reactor, introducing pure oxygen, carrying out dispersion through a microporous aeration head, turning on an irradiation light source, controlling the reaction temperature to be 54-56 DEG C and the irradiation time to be 35-40 minutes, and carrying out photocatalytic decomposition. And cooling the obtained reaction liquid to 50-52 DEG C, carrying out centrifugal layering through a centrifugal machine, recovering the ionic liquid at the lower layer, and obtaining a trifluralin product at the upper layer. According to the method disclosed by the invention, the removal efficiency of the nitrosamine is high, and the content of the nitrosamine with the content of 10-300ppm can be reduced to 0.1 ppm or below.

The present invention addresses the problem of improving cycle characteristics. The positive electrode active material for a lithium ion secondary battery contains single crystal particles. The single crystal particles contain a lithium transition metal composite oxide. The lithium transition metal composite oxide contains, as a main component, a crystal structure belonging to space group R-3m. In the crystal structure, the 3a site contains lithium ions, and the 3b site contains at least nickel ions. Positive ion mixing occurs between the lithium ions at the 3a site and the nickel ions at the 3b site. The positive ion mixing rate, which is the occupancy rate of nickel ions in the 3a site, is 2.5% or more and 7.3% or less.