5results about How to "Improve interface contact performance" patented technology

The invention discloses a flexible transparent film lithium ion battery and a preparation method thereof, and belongs to the field of flexible transparent energy storage devices. The lithium ion battery comprises a positive pole piece, a negative pole piece and a transparent polymer semi-solid electrolyte membrane positioned between the positive pole piece and the negative pole piece, the positive pole piece comprises an Au mesh / PET (Polyethylene Terephthalate) current collector substrate and a LiMn2O4 (at) MWCNTs positive active material layer sprayed on the surface of the Au mesh / PET current collector substrate; the negative electrode plate comprises an Au mesh / PET current collector substrate and a Li4Ti5O12-coated MWCNTs negative electrode active material layer sprayed on the surface of the Au mesh / PET current collector substrate; the transparent polymer semi-solid electrolyte membrane is a PVDF-HFP / PMMA (Polyvinylidene Fluoride-HFPP / Polymethyl Methacrylate)-based gel polymer electrolyte membrane and comprises LiTFSI (LiTFSI) and EMImTFSI. The flexible transparent film lithium ion battery prepared by the invention is of a semi-solid laminated structure, has the advantages of high flexibility, high transparency, excellent cycle performance, rate capability, high bending resistance and the like, and has a good application prospect.

The invention belongs to the field of battery materials, and discloses a high-performance composite positive electrode material and a preparation method and application thereof.The preparation method of the high-performance composite positive electrode material comprises the steps that an MOF material and a flaky conductive carbon material are mixed through ball milling, then a solid electrolyte material is added for continuous ball milling, then the positive electrode material is added for continuous ball milling, roasting is conducted in the inert atmosphere, and the high-performance composite positive electrode material is obtained. Obtaining a finished product. An electron-ion-active material interpenetrating structure is formed by the MOF material, the sheet-shaped conductive carbon material and the solid electrolyte material, so that the interface contact can be improved, the stability of the composite positive electrode can be improved, the cycle life of the battery can be remarkably prolonged, and the requirements of the long-cycle-life solid-state lithium metal battery can be met.

The present application relates to a kind of encapsulation piezoresistive sensor and the preparation method of composite adhesive material.The preparation method of the composite adhesive material is by the composite material one including nano-conductive material and polymer porous sponge, lower part is loaded in the composite material two including nano-conductive material and PDMS film, then put into vacuum drying oven and with 50-80 ℃ heat preservation 10-60 min, to prepare composite adhesive material.The interface contact between the lower adhesive film and the upper porous sponge of the prepared composite adhesive material is good, with good piezoresistive performance.The encapsulation piezoresistive sensor utilizes composite adhesive material to realize adhesive connection, adopts the structure without introducing external packaging, with higher stability, while having high sensitivity and wide measurement range.

The invention provides a lithium iron phosphate battery and a preparation method thereof, the lithium iron phosphate battery comprises: (1) a gradient structure positive plate, the positive plate comprises a current collector, an inorganic solid electrolyte interface layer arranged on the current collector, and a positive active material layer, the positive active material layer comprises an inner layer and an outer layer, the inner layer is close to the inorganic solid electrolyte interface layer, the outer layer is close to the diaphragm, the compaction density of the inner layer is larger than that of the outer layer, and the conductive agent content of the inner layer is smaller than that of the outer layer; (2) a negative plate; (3) a diaphragm; and (4) performing in-situ polymerization to form a solid electrolyte phase. The gradient structure design is introduced into the positive plate, that is, the inner layer adopts relatively high compaction density and relatively low conductive agent content, and the outer layer adopts relatively low compaction density and relatively high conductive agent content, so that the electronic conductivity and the ion transmission efficiency can be effectively considered.

The invention discloses an organic semiconductor material, a preparation method, application and a perovskite solar cell, and belongs to the technical field of organic semiconductor materials and solar cells. An organic semiconductor material having a specially designed structure is provided. By introducing the rigid side arm structure, the conjugate length of the core unit is effectively prolonged, and the carrier transport capability of the hole transport material can be effectively enhanced; particularly, heteroatoms such as oxygen, sulfur and selenium contained in the rigid side arm structure can form a coordination effect with lead atoms in the perovskite, so that multiple effects of passivating defects, namely assisting the crystallization of the perovskite material and the like are achieved; when the perovskite solar cell is prepared, the rigid structure may slow down the aggregation of molecules in a solution and the diffusion rate on a substrate, so that the crystallization process is more uniformly regulated and controlled, the formation of a large-area, high-quality and low-defect-density perovskite thin film is facilitated, pinhole and grain boundary defects are reduced, and the performance of the perovskite solar cell is improved.