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Positive electrode electrolyte for zinc-manganese flow battery

A positive electrolyte and flow battery technology, applied in the field of flow batteries, can solve the problems of battery cycle reversibility and stability, and achieve the effect of improving Coulombic efficiency and energy efficiency, price and resource advantages

Active Publication Date: 2021-09-24
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a positive electrode electrolyte for zinc-manganese flow batteries, which solves the problems of battery cycle reversibility and stability caused by the disproportionation reaction of trivalent manganese ions

Method used

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  • Positive electrode electrolyte for zinc-manganese flow battery
  • Positive electrode electrolyte for zinc-manganese flow battery
  • Positive electrode electrolyte for zinc-manganese flow battery

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Embodiment

[0029] In this embodiment, the anode electrolyte of the zinc-manganese redox flow battery includes: disodium manganese edetate, NaCl as the supporting electrolyte, and deionized water. Among them, the concentration of disodium manganese edetate is 0.5mol / L, and the concentration of NaCl is 3mol / L to ensure the same concentration of positive and negative electrode supporting electrolytes. The specific operation steps are:

[0030] Weigh 3.89g disodium manganese edetate and 3.48g sodium chloride particles in a beaker and dissolve them in deionized water, pour them into a 50mL volumetric flask and mix well.

[0031] Negative Electrolyte ZnCl 2 The concentration is 0.5mol / L, the supporting electrolyte concentration is also 3mol / L, and the supporting electrolyte is increased by ZnCl 2 The dissolution rate of the negative electrode electrolyte is specifically configured as follows:

[0032] Weigh 1.36g of zinc chloride in a beaker, add deionized water to dissolve it, then add 3.48...

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Abstract

The invention is applied to the field of flow batteries, and particularly relates to a positive electrode electrolyte for a zinc-manganese flow battery. The positive electrode electrolyte of the zinc-manganese flow battery comprises a manganese ion reaction active substance, a supporting electrolyte and solvent water, the manganese ion reaction active substance is a divalent manganese ion complex, and the supporting electrolyte is used for improving the solution conductivity. According to the invention, the manganese ion complex is selected as a positive active material, and the coordination structure of manganese ions is changed by utilizing the complexation reaction of divalent manganese ions and the complexing agent, so that the problem of disproportionation of trivalent manganese ions is solved, and the coulombic efficiency and the energy efficiency of the battery are improved, and long-term stable circulation is realized. The novel zinc-manganese flow battery provided by the invention is pollution-free, safe and reliable, and has price and resource advantages.

Description

technical field [0001] The invention is applied in the field of flow batteries, and in particular relates to a positive electrode electrolyte for zinc-manganese flow batteries. Background technique [0002] With the development of social life and technological level, human beings demand more and more energy. Petroleum non-renewable energy is becoming increasingly scarce, and research on renewable energy is imperative. However, energy sources such as wind energy and solar energy are often affected by the environment and geography, so the research and development of secondary batteries is crucial. [0003] As a new type of energy storage battery, flow battery has been extensively studied due to its high safety, environmental friendliness and long-term stable cycle characteristics. At present, the all-vanadium flow battery is the most researched, widely used and most mature flow battery, but the high price of vanadium limits its further commercialization. [0004] Zinc-manga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/18
CPCH01M8/188H01M2300/0002Y02E60/50
Inventor 唐奡于潇李瑛
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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