Sulfur/polypyrrole/graphene/carbon nanotube composite film and preparation method and application thereof

A carbon nanotube composite, graphene composite technology, applied in the direction of active material electrodes, electrical components, electrochemical generators, etc., can solve the problems of complex and time-consuming processes, improve rate performance, improve reaction kinetics, increase The effect of charging and discharging speed
CN110459755AActive Publication Date: 2019-11-15BEIJING INSTITUTE OF TECHNOLOGYGY
8 Cites 8 Cited by

Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING INSTITUTE OF TECHNOLOGYGY
Publication Date
2019-11-15

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a sulfur / polypyrrole / graphene / carbon nanotube composite film and a preparation method and an application thereof, and belongs to the technical field of chemical energy storage batteries. Polypyrrole in the film is grafted on reduced graphene oxide; the reduced graphene oxide and the functionalized carbon nanotubes are interwoven to form a three-dimensional carbon framework;and elemental sulfur is loaded in the three-dimensional carbon framework. According to the method, self-assembly is initiated by using an oxidation-reduction reaction between pyrrole and graphene oxide. Meanwhile, the functionalized multi-walled carbon nanotubes serve as a second carbon framework to provide an ion / electron rapid transmission channel, and a flexible self-supporting composite film is constructed through one-step vacuum filtration and post-sulfur loading. By using the strong adsorption of polypyrrole to polysulfide and the synergistic effect of the interwoven three-dimensional conductive framework constructed by graphene and carbon nanotubes, the problems of inherent non-conductivity of elemental sulfur, shuttle effect of polysulfide and the like can be solved, and the electrochemical performance of the lithium-sulfur battery is further improved.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention provides a sulfur / polypyrrole / graphene / carbon nanotube composite film, a preparation method and an application thereof, belonging to the technical field of chemical energy storage batteries. Background technique

[0002] In order to alleviate environmental pollution and reduce dependence on fossil fuels, it is urgent to develop and utilize renewable alternative energy technologies. Secondary batteries represented by lithium-ion batteries are one of the most viable options for electrochemical energy storage devices. With the rapid development of related fields such as mobile electronic devices, electric vehicles and emerging wearable electrical technologies, the commercial batteries on the market can no longer meet the demand, and people have put forward higher requirements for the research and development of battery technology. Therefore, environmentally friendly secondary batteries with high volumetric energy density, high safety, long ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More