2results about How to "Does not affect electrochemical performance" patented technology

This invention belongs to the field of lithium-ion battery technology, specifically relating to a Ni-doped molybdenum carbide / lithium oxalate composite lithium replenisher. The invention first obtains a Ni molecular catalyst through a liquid-phase reaction of triethanolamine and nickel chloride in ethanol, followed by calcination with Mo₂C to form a composite Ni-doped molybdenum carbide catalyst. Then, using an anti-solvent crystallization method, the lithium replenisher solution is dropwise into an organic solvent containing the catalyst, stirred, and then vacuum dried. The lithium replenisher particles adhere to the catalyst surface and / or pores, forming the composite lithium replenisher. This composite lithium replenisher, by combining lithium oxalate with the Ni-doped molybdenum carbide catalyst, utilizes the highly active catalytic sites, excellent electronic conductivity, and synergistic catalytic effect of Ni-doped molybdenum carbide to reduce the decomposition voltage of lithium oxalate, improve its conductivity and decomposition rate, thereby significantly improving the battery's initial efficiency, capacity, and cycle performance. Furthermore, the preparation process is simple, highly compatible, and has good commercial application prospects.

This invention discloses a high-strength, heat-resistant lithium-ion battery separator and its preparation method, belonging to the field of lithium-ion battery technology. The separator is a multilayer composite structure, comprising: a rigid porous framework membrane prepared from a rigid polymer material via thermally induced phase separation as a support layer; and a functional layer composited on the surface of the support layer. The functional layer is a gel electrolyte separator formed from a covalent organic framework material via electrospinning, containing a hierarchical porous network of micropores, mesopores, and macropores, and a flame retardant dispersed in the pores of the separator. The preparation method includes: thermally induced phase separation after melt blending, biaxial stretching and extraction, electrospinning surface deposition, flame retardant introduction, and hot pressing. The separator of this invention, through the synergistic effect of the rigid framework and the COFs gel layer, possesses high mechanical strength, high heat resistance, high ionic conductivity, and thermal runaway management functions, effectively improving the safety and cycle stability of semi-solid-state lithium-ion batteries.