11 results about "Ion mixing" patented technology

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 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 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 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 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.