An alkaline full-iron flow battery and a preparation method of an electrode material

By specifically treating the positive and negative electrode materials of alkaline all-iron flow batteries, the reactive sites on the electrode surface are increased, solving the problems of low electrochemical reaction activity and insufficient charge and discharge capacity, and achieving higher charge and discharge efficiency and cost-effectiveness.

CN116435567BActive Publication Date: 2026-02-03WUHAN GLT ENERGY & ENVIRONMENTAL TECH CO LTD
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Patent Information

Application Number
CN202310488775.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-04-25
Publication Date
2026-02-03
Estimated Expiration
2043-04-25

AI Technical Summary

Technical Problem

Existing alkaline all-iron flow batteries have low electrochemical reactivity and low charge/discharge capacity, and the preparation methods of positive and negative electrode materials fail to meet the requirements for high-efficiency charge and discharge.

Method used

By subjecting the positive electrode material to high-temperature activation, impregnation with thiocyanate solution, and high-temperature heat treatment, and the negative electrode material to activation treatment by hydrothermal method or high-temperature thermal decomposition method, the reactive sites on the electrode surface are increased.

Benefits of technology

It improves the adsorption capacity and electrochemical activity of the positive and negative electrode electrolytes, enhances the charge and discharge capacity of alkaline all-iron flow batteries, and has a simple preparation method, readily available raw materials, and low cost.

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Abstract

The application discloses a kind of alkaline full iron liquid flow batteries and preparation method of electrode material.Its characteristics are: the positive electrolyte of the alkaline full iron liquid flow battery is with ferrocyanide as active substance, one or both of NaOH and KOH as supporting electrolyte, the negative electrolyte is with 3-[N-N-bis (2-hydroxyethyl) amino]-2-hydroxypropane sulfonic acid and ferric chloride reaction to form complex iron as active substance, one or both of NaOH and KOH as supporting electrolyte to form the alkaline full iron liquid flow battery.The application increases the reaction active site of positive and negative electrode electrolyte active substance on the surface of electrode respectively, so as to improve the charge-discharge capacity of liquid flow battery.
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