4results about How to "Facilitates insertion and extraction" patented technology

The invention relates to the technical field of sodium-ion batteries, and discloses a sodium-ion battery positive electrode material and a preparation method thereof.The sodium-ion battery positive electrode material comprises a nano-composite active substance, a conductive substance and a functional binder, and the nano-composite active substance is prepared by coating organic compounds 7, 7, 8, 9, 10, 11, 12, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13 Compared with the prior art, the positive electrode material has the advantages that the positive electrode material is prepared from 7, 7, 8, 8-tetracyano-p-benzoquinone dimethane, so that the conductivity is enhanced, the number of active sites is increased, meanwhile, the dissolution of an organic compound 7, 7, 8, 8-tetracyano-p-benzoquinone dimethane in an electrolyte is effectively slowed down and inhibited, and the specific capacity, the cycling stability and the rate capability of the positive electrode material of the sodium-ion battery are improved; the functional adhesive is environment-friendly, has excellent adhesive property and ionic conductivity, and can reduce the phenomenon of interface stripping in the charge-discharge process; therefore, the sodium ion battery positive electrode material prepared by the invention has excellent cycling stability, rate capability and higher specific capacity.

This application provides an amino- and tertiary-amine-modified triazine hard carbon porous material, its preparation method, and an anode. Using tris(4-aminophenyl)amine and 4-amino-3,5-dibromobenzonitrile as raw materials, acetonitrile as solvent, and CuI as catalyst, NH2-SL is synthesized via a Ullmann reaction. The mixture is then reacted in a tube furnace at 450℃ for 40 h to synthesize CTF-NH2 containing an imine structure. Subsequently, high-temperature calcination is performed to synthesize NH2-1000. The triazine porous framework obtained in this application exhibits excellent physicochemical stability, high nitrogen content, and high porosity. Compared to the material before calcination at 1000℃, the interplanar spacing of the hard carbon porous material increases by 0.0034 nm, which is more conducive to sodium ion insertion and extraction. Therefore, the prepared NH2-1000, as a sodium-ion battery anode, demonstrates a high reversible capacity of 209.1 mAh / g in a 2A / g rate performance test, making it widely applicable as a secondary battery anode material.

The present invention discloses a method for preparing a doped and modified single crystal manganese-based lithium ion sieve and its application in extracting lithium from salt lakes. 2‑x M x O4, 0≤x≤0.1, M includes at least one of Al, Ni, Cr, and Cu; the doped and modified single crystal manganese-based lithium ion sieve is a spinel crystal. In the doped and modified single crystal manganese-based lithium ion sieve of the present invention, cation doping reduces the crystal lattice on the one hand, and cation doping replaces part of the manganese element on the other hand, reducing the proportion of manganese element, reducing the manganese dissolution loss caused by the disproportionation reaction, and alleviating the Jahn-Teller effect of the crystal.

This application provides an amino- and tertiary-amine-modified triazine hard carbon porous material, its preparation method, and an anode. Using tris(4-aminophenyl)amine and 4-amino-3,5-dibromobenzonitrile as raw materials, acetonitrile as solvent, and CuI as catalyst, NH2-SL is synthesized via a Ullmann reaction. The mixture is then reacted in a tube furnace at 450℃ for 40 h to synthesize CTF-NH2 containing an imine structure. Subsequently, high-temperature calcination is performed to synthesize NH2-1000. The triazine porous framework obtained in this application exhibits excellent physicochemical stability, high nitrogen content, and high porosity. Compared to the material before calcination at 1000℃, the interplanar spacing of the hard carbon porous material increases by 0.0034 nm, which is more conducive to sodium ion insertion and extraction. Therefore, the prepared NH2-1000, as a sodium-ion battery anode, demonstrates a high reversible capacity of 209.1 mAh / g in a 2A / g rate performance test, making it widely applicable as a secondary battery anode material.