Lithium-lanthanum-titanium-doped modified electrostatic spinning supercapacitor diaphragm material

Abstract

The invention discloses a lithium-lanthanum-titanium-doped modified electrostatic spinning supercapacitor diaphragm material. The lithium-lanthanum-titanium-doped modified electrostatic spinning supercapacitor diaphragm material is prepared from the following raw materials in parts by weight: 80-83 parts of polyvinylidene fluoride, 20-22 parts of polymethyl methacrylate, a proper amount of DMF, 2-3 parts of nano boehmite, 0.8-1 part of a silane coupling agent KH550, a proper amount of deionized water, 1.5-2 parts of lanthanum trioxide, 1.5-2 parts of lithium carbonate, 2-3 parts of titanium dioxide, 8-9 parts of polyimide and a proper amount of absolute ethyl alcohol. The lanthanum trioxide, the lithium carbonate and the titanium dioxide are compounded by a certain chemical process to obtain a dopant with certain electric conductivity, the dopant is added in preparation of the diaphragm material, the mechanical property of electrolyte can be enhanced, and the conductivity can also be improved remarkably. The diaphragm material has a fibrous duct structure with good connectivity, and has good electrolyte absorbing property and good electrochemical performance; the process facilitates industrial production; and the lithium-lanthanum-titanium-doped modified electrostatic spinning supercapacitor diaphragm material is suitable for a supercapacitor.

Description

technical field [0001] The invention relates to the technical field of supercapacitors, in particular to a lanthanum-lithium-titanium-doped modified electrospun supercapacitor diaphragm material. Background technique [0002] Supercapacitor is a highly competitive energy storage device. Because it can realize fast charging, high current discharge, and has a charging life of more than 100,000 times, it plays an important role in some applications that require short-term high-rate discharge. . The power supply requirements of hybrid electric vehicles and electric vehicles have also aroused worldwide attention to supercapacitors, a new type of energy storage device. In the composition of supercapacitors, electrodes, electrolyte and separator paper play a decisive role in the performance of supercapacitors. At present, the electrodes and electrolytes of supercapacitors are research hotspots, but the research and attention on separators is not high. [0003] The separator pape...

AI Technical Summary

Problems solved by technology

"Preparation of PAN / PVDF-HFP supercapacitor separator by electrospinning method and its mechanical properties" The membrane is subjected to hot-pressing treatment. Although the performance of the obtained membrane material is improved compared with that of the commercial membrane, it still has the disadvantages of low strength, short life, and low output. It is necessary to further modify the electrospun membrane material to improve the performance of the membrane. thermal stability, mechanical properties