Oxidizability and reducibility conducting polymer flow anode used for flow battery

Abstract

The invention discloses an oxidizability and reducibility conducting polymer flow anode with used for a flow battery. An oxidizability and reducibility conducting polymer or a conducting polymer and an inorganic substance composite material are dispersed in electrolyte solution to form electrolyte of the flow battery, the electrolyte and a three-dimensional mesh current-collection body commonly constitute an emulsus flow electroactive polymer anode, and anode flow passes an anode chamber in a flowing form in the charging and discharging processes and is used for forming a flow battery system. As the dimension of the conducting polymer and the dimension of the inorganic substance composite material of the conducting polymer are large, the battery can adopt a common porous diaphragm; in addition, the corrosion of a medium system of the electrolyte of the battery used for an electroactive material to a solid current collector is small, and therefore, the environmental pollution is small in the production and using processes; the conducting polymer is rich in source, so as to be prepared on a large scale by an organic synthesis method; and the cost of the flow battery can be greatly lowered.

Description

technical field [0001] The invention relates to the field of high-power secondary liquid flow batteries, in particular to zinc secondary batteries, vanadium secondary batteries, and lithium secondary batteries, which use conductive polymers polyaniline, polypyrrole, and inorganic composite materials as main components. Preparation method of milky flowable cathode material. technical background [0002] With the continuous deterioration of the global environment and people's attention to environmental issues, it is imminent to develop new environmentally friendly and clean energy sources. Redox flow batteries are an energy storage system that has emerged in recent years. It has both the performance of ordinary batteries and fuel cells. It has the advantages of long working life and storage life, fast charge and discharge, and good discharge depth performance. At the same time, the closed circulation system avoids contact with the outside world and has little environmental pol...

AI Technical Summary

Problems solved by technology

The aqueous solution of bromine and bromine salt is corrosive to the battery material, and the long-term operation of the battery will cause the aging and deformation of the battery material, which greatly affects the performance and service life of the battery

[0003] At present, there are several problems in the commercial application of redox flow batteries as follows: (1) Material cost, especially for all-vanadium redox flow batteries, because the vanadium compounds used are scarce materials, it is not only costly to use in large quantities, but also difficult to pass the technology. way to drastically reduce its cost

Bromide and Br used in flow batteries using bromine as the catholyte 3 - 、Br 5 - Ionic stabilizers make the cost higher; (2) environmental protection issues, water-soluble vanadium compounds are highly toxic, environmental control standards are high, and there is a high risk of environmental pollution during production and use

The flow battery with bromine as the cathode liquid also has a strong smell of molecular bromine generated during use; (3) The requirements for the ion diaphragm are high, and the ion diaphragm must be acid-resistant and oxidation-resistant; (4) The life of the electrode plate, in order to improve the V in catholyte 5+ Solubility now uses more than 2mol / L of H 2 SO 4 As a supporting electrolyte, high-acid medium has high requirements on the electrode plate

In addition, the cathode liquid of the bromine flow battery corrodes the graphite electrode plate greatly, and the life of the electrode plate has not been solved well.