Aqueous zinc-manganese battery fiber with dual-functional protective layer and preparation method thereof

Abstract

The invention discloses a water-based zinc-manganese battery fiber with a dual-function protective layer and a preparation method thereof. In the fiber battery of the present invention, the carbon nanotube fiber loaded with manganese dioxide / carbon nanotube film / 3,4-polyethylenedioxythiophene composite material is used as the positive electrode, and the carbon nanotube fiber deposited with zinc is used as the negative electrode, and the two electrodes are intertwined It is obtained by forming a winding structure, injecting liquid electrolyte and packaging; the preparation steps include: preparation of PEDOT / CNT / manganese dioxide / current collector positive electrode, preparation of flexible zinc negative electrode, and assembly of fiber zinc-manganese dioxide full battery. Among them, the carbon nanotube film provides a continuous conductive channel for electron transport during charging and discharging, and enhances the mechanical stability of the battery fiber. PEDOT can enhance the contact between the carbon tube film and manganese dioxide, reduce the poor dissolution of the active material and improve conductivity. Weaving this fiber battery into fabrics can prepare flexible and wearable electronic devices with excellent performance.

Description

technical field [0001] The invention belongs to the technical field of zinc-ion batteries, and in particular relates to a water system rechargeable zinc-manganese battery fiber and a preparation method thereof. Background technique [0002] With the rapid development of social economy and the improvement of human living standards, people have put forward new urgent needs for portable and intelligent electronic devices, and the development of new flexible and wearable electronic devices with high performance, low cost and integration has become an important task in recent years. Research Hotspots [1] . These wearable electronic devices rely on indispensable high-performance power systems, which not only require small size and excellent flexibility, but also need to be able to adapt to frequent bending and deformation during use. However, traditional energy storage systems, such as supercapacitors, lithium-ion batteries, etc., are usually bulky and rigid, and it is difficult...

AI Technical Summary

Problems solved by technology

[0006] However, the zinc-manganese dioxide aqueous rechargeable battery system also has some disadvantages. First, as a metal oxide, manganese dioxide has poor conductivity (generally 10 -5 -10 -6 S cm -1 ), which makes the kinetics of the electrode process slow and the utilization rate of the electrode material is low, resulting in poor rate performance and low specific capacity of the battery; secondly, in the process of charging and discharging, with the insertion and extraction of large-volume zinc ions, the manganese dioxide crystal The grid will continue to change, causing the active material to disintegrate and fall off easily and dissolve into the electrolyte

Especially for fibrous batteries, due to the large degree of deformation of the battery during use, the shedding of manganese dioxide will intensify and reduce the cycle life of the battery, which is not conducive to the construction of a stable fiber battery.

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