5results about How to "Reduce Shuttle Effect" patented technology

This invention provides a lithium titanium dioxide sodium phosphate anode material and an aqueous lithium-iodine battery based thereon, belonging to the field of secondary battery technology. The chemical formula of the lithium titanium dioxide sodium phosphate anode material is Li. x Na y Ti2(PO4)3, where 0

The invention relates to an iodine-containing acetonitrile electrolyte for a high-energy-density battery as well as a preparation method and application of the iodine-containing acetonitrile electrolyte, and belongs to the technical field of aqueous zinc-iodine batteries. The iodine-containing acetonitrile electrolyte for the high-energy density battery comprises a zinc salt, iodine acetonitrile and deionized water. Compared with a traditional zinc-iodine battery which only depends on iodine positive electrode oxidation reduction, the battery prepared from the iodine-containing acetonitrile electrolyte for the high-energy-density battery in the invention has the advantages that the iodine-containing acetonitrile electrolyte for the high-energy-density battery can be subjected to auto-oxidation reduction in the charging and discharging process, and the multi-iodide shuttle effect is reduced; therefore, the corrosion to the negative electrode is reduced and the battery capacity is remarkably improved. In addition, different from a multi-electron transfer type high-energy-density zinc ion battery, the iodoacetonitrile does not provide an additional redox platform, but enhances the I-I0 reaction through a special channel of self-redox of an electrolyte medium.

The application discloses a preparation method of single-atom modified porous carbon material and application of the single-atom modified porous carbon material in lithium-sulfur batteries. The preparation method comprises the following steps: preparing zinc-based metal organic framework material Zn-MOF nanoparticles; coating phenolic resin (RF) on surfaces of the Zn-MOF nanoparticles to obtain Zn-MOF-RF nanoparticles; adsorbing X metal salt on the Zn-MOF-RF nanoparticles by using a solution immersion method; and obtaining X single-atom loaded hollow nitrogen-doped porous carbon (X-N / HNPC) composite material by high-temperature carbonization under an inert atmosphere. The composite material has a large specific surface area and rich pore size structure, and as a positive electrode material, can not only improve the utilization rate of active material sulfur, but also effectively adsorb polysulfides by high catalytic active sites, improve redox reaction kinetics, and further inhibit the shuttle effect of polysulfides. Based on the lithiumophilicity of metal single atoms, as a lithium negative electrode carrier, the lithium uniform deposition can be regulated, the growth of lithium dendrites can be relieved, and the stability of the battery can be improved.

This invention belongs to the field of functional material preparation, and particularly relates to a flake-like MoO2. 2 / Mo 2 C@poplar catkin biomass carbon composite material and its application: scaly MoO2 was prepared by a method of poplar catkin carbonization-impregnation with molybdate-calcination in an inert atmosphere. 2 / Mo 2 C@poplar catkin biomass carbon composite material, and further calcined the material in air to prepare hollow tubular MoO 3 The materials and synthesis methods are simple and easy to implement. The materials obtained in this invention exhibit excellent performance as anode materials for lithium-ion batteries and cathode carrier materials for lithium-sulfur batteries, which is beneficial for the preparation of high-energy-density electrode materials. Moreover, the preparation method is inexpensive and can simultaneously solve the harm caused by poplar catkins, realizing the high-value utilization of poplar catkins.

This invention relates to the field of battery fabrication, specifically disclosing a tetragonal zirconium dioxide / carbon sphere composite material and its preparation method and application. The method includes the following steps: (1) dissolving zirconium tetrachloride in a solvent, then adding dopamine, and after thorough dissolution and mixing, slowly adding ammonia water. As ammonia water is added, the solution gradually turns into a milky white opaque liquid. The solution is continuously stirred at room temperature until it gradually changes from milky white to brownish-black, obtaining a zirconium-based / polydopamine composite precursor; (2) centrifuging the obtained zirconium-based / polydopamine composite precursor, washing it to obtain a brownish-black precipitate, drying the brownish-black precipitate to obtain a brownish-black precursor powder; (3) calcining the precursor powder to obtain a tetragonal zirconium dioxide / carbon sphere composite material. This invention successfully constructs a metastable tetragonal zirconium dioxide composite catalyst induced by polydopamine and confined to the surface of carbon spheres.