Aqueous zinc-manganese battery fiber with dual-function protective layer and of fiber

Abstract

The invention discloses a water-based zinc-manganese battery fiber with a dual-function protective layer and a preparation method of the water-based zinc-manganese battery fiber. The fiber battery is obtained by taking a carbon nanotube fiber loaded with a manganese dioxide/carbon nanotube film/3, 4-polyethylene dioxythiophene composite material as a positive electrode and a carbon nanotube fiber deposited with zinc as a negative electrode, winding the two electrodes to form a winding structure, injecting a liquid electrolyte and packaging. The preparation method comprises the following steps: preparing the PEDOT/CNT/manganese dioxide/current collector positive electrode, preparing the flexible zinc negative electrode, and assembling the fiber zinc-manganese dioxide total battery. The carbon nanotube film provides a continuous conductive channel for electron transport in the charge-discharge process and enhances the mechanical stability of battery fibers, and the PEDOT can enhance the contact between the carbon nanotube film and manganese dioxide and reduce the poor dissolution of active substances so as to improve the conductivity. A flexible wearable electronic device with excellent performance can be prepared by weaving the fiber battery into a fabric.

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.

Images