7 results about "Ion mixing" patented technology

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 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 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.