5results about How to "Good electrolyte wettability" patented technology

The invention provides a preparation method and application of a composite diaphragm with a multistage nanometer branch structure, and belongs to the technical field of lithium metal batteries. A polymer matrix, a first structure inducer and a second structure inducer form a precursor solution, and the precursor solution is subjected to an electrostatic spinning process and in-situ induction to form the multi-stage structure composite diaphragm with a trunk-branch characteristic; the first structure inducer is a quaternary ammonium salt compound, and the second structure inducer is imidazolium ionic liquid. The dual-inducer system endows the lithium metal negative electrode with interface stability and cycle reliability.

The invention discloses a flexible electrode film and a preparation method and processing equipment thereof, and belongs to the technical field of electrochemistry and environmental engineering. The thickness of the flexible electrode film is 40-1000 [mu] m, the flexible electrode film is provided with a fiberized three-dimensional network, an active material is adhered in the fiberized three-dimensional network, the interior of the flexible electrode film is also provided with a pore structure which is distributed with the fiberized three-dimensional network in a mutually interlaced manner, the pore structure is composed of a plurality of pores, and the pores are distributed in an interlaced manner. And the holes are in through or semi-through pore morphology. Soluble salt is introduced as a temporary structure regulation component, a uniformly distributed pore structure is formed in the electrode after subsequent removal, ion transmission conditions in the thick electrode are improved, and the utilization rate of active substances is increased. The fiberized three-dimensional network structure and a pore structure formed by salt pore forming cooperate with each other, so that the electrode achieves higher effective capacity and energy density in a unit area.

This invention relates to the field of battery technology, specifically to a separator, comprising a base film layer, a first coating layer located on one side of the base film layer, and a second coating layer located on the other side of the base film layer; the first coating layer comprises a sponge-like porous structure; the first coating layer comprises a polymer continuous phase and a porous structure, first inorganic particles, and first polymer particles dispersed in the polymer continuous phase, the polymer continuous phase, the porous structure dispersed in the polymer continuous phase, and the first inorganic particles forming a sponge-like porous structure; the first polymer particles form protrusions on the side of the first coating layer facing away from the base film layer; the second coating layer comprises second inorganic particles and second polymer particles, each independently forming a ceramic layer and a polymer layer, or mixed together to form a ceramic-polymer blend layer. The separator of this invention has excellent resistance to foreign object puncture and interfacial heat transfer efficiency, which can significantly improve the safety performance and cycle performance of the battery.

The present invention relates to a composition for an electrolyte of a lithium secondary battery, a gel polymer electrolyte including a polymerization product thereof, and a lithium secondary battery including the gel polymer electrolyte, the composition including a lithium salt, a polyalkylene carbonate-based polymer including a unit represented by Formula 1 below and having a weight average molecular weight of 1,000 g / mol to 1,500,000 g / mol, and an organic solvent, wherein the composition either includes lithium difluoro(oxalato)borate and lithium bis(oxalato)borate at a weight ratio of 1:5 to 5:1, or includes a compound represented by Formula 3-1 in an amount of 0.01 wt% to 5 wt% and a compound represented by Formula 3-2 in an amount of 0.01 wt% to 10 wt% based on the total weight of the composition.

This invention discloses an electrode slurry for a high-capacity lithium battery for unmanned aerial vehicles and its coating process, belonging to the field of electrode material technology. By weight, it comprises the following raw materials: 5-8 parts polybenzimidazole, 40-50 parts dimethylacetamide, 15-20 parts supported MOF composite graphene, 3-4 parts carbon nanotubes, and 5-10 parts conductive carbon black. The supported MOF composite graphene is prepared by adsorbing and loading p-aminobenzoic acid onto MOF composite graphene. The MOF composite graphene is prepared by in-situ synthesis of Cu-MOF on the surface of modified graphene. This invention improves the heat resistance and mechanical properties of the binder through the amidation reaction of polybenzimidazole with p-aminobenzoic acid on the surface of graphene oxide nanosheets. It also increases the adhesion of the binder to the graphene oxide nanosheets by synthesizing a porous structure on the surface of the graphene oxide nanosheets, reducing the detachment of graphene nanosheets caused by high temperature and electrolyte.