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Lead liquid flow battery electrolyte

A technology of electrolyte and flow battery, which is applied in the field of electrolyte of flow battery and electrolyte of lead flow battery, which can solve the problems of easy decomposition, easy generation of oxygen, energy loss, etc., and achieve the effect of simple preparation

Inactive Publication Date: 2012-10-10
NO 63971 TROOPS PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the methanesulfonic acid aqueous solution of lead methanesulfonate, the sedimentary lead dioxide electrode is easy to generate oxygen, resulting in energy loss, and the sedimentary lead electrode is easy to form mossy or dendrite
Methanesulfonic acid also has the disadvantage of being easy to decompose under certain conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Take 878 grams of 40 wt% tetrafluoroboric acid, slowly add 334 grams of yellow lead oxide, and then slowly add 15 grams of cadmium tetrafluoroborate. After the yellow lead oxide and cadmium tetrafluoroborate are completely dissolved, filter with a G4 funnel, keep the filtrate and make it 1000 ml, then it can be used as the electrolyte of the lead flow battery. The concentration of tetrafluoroboric acid is about 1 mole per liter, the concentration of lead ions is about 1.5 moles per liter, the concentration of cadmium ions is about 0.05 moles per liter, and the concentration of tetrafluoroborate is greater than 4 moles per liter. The electrolyte can be directly used in deposition-type lead flow batteries.

Embodiment 2

[0016] Take 768 grams of 40 wt% tetrafluoroboric acid, slowly add 334 grams of yellow lead oxide, then slowly add 15 grams of cadmium tetrafluoroborate, 1.15 grams of manganese tetrafluoroborate and 28.8 grams of methanesulfonic acid. After the yellow lead oxide, cadmium tetrafluoroborate and manganese tetrafluoroborate are completely dissolved, filter with a G4 funnel, keep the filtrate and make it 1000 ml, then it can be used as the electrolyte of the lead flow battery. Among them, the concentration of tetrafluoroboric acid is about 0.5 moles per liter, the concentration of lead ions is about 1.5 moles per liter, the concentration of cadmium ions is about 0.05 moles per liter, the concentration of manganese ions is about 0.005 moles per liter, and the concentration of tetrafluoroborate is greater than 3.6 moles per liter. The concentration of methanesulfonic acid is about 0.3 moles per liter. The electrolyte can be directly used in deposition-type lead flow batteries.

Embodiment 3

[0018] Take 658 grams of 40wt% tetrafluoroboric acid, add 200 milliliters of water, slowly add 76 grams of lead tetrafluoroborate, then slowly add 15 grams of cadmium tetrafluoroborate, 1.15 grams of manganese tetrafluoroborate, 28.8 grams of methanesulfonic acid, 1.15 grams of tetrafluoroborate cobalt fluoroborate, 0.1 g calcium tetrafluoroborate and 40.6 g lead perchlorate. After the above salt is completely dissolved, filter it with a G4 funnel, keep the filtrate and set the volume to 1000 ml, which can be used as the electrolyte of the lead flow battery. Among them, the concentration of tetrafluoroboric acid is about 3 moles per liter, the concentration of lead ions is about 0.4 moles per liter, the concentration of cadmium ions is about 0.05 moles per liter, the concentration of manganese ions is about 0.005 moles per liter, the concentration of cobalt ions is about 0.005 moles per liter, and the concentration of calcium ions is about 0.005 moles per liter. The concentrat...

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PUM

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Abstract

The invention relates to the electrochemical engineering and industrial fields, particularly to a lead liquid flow battery electrolyte comprising the basic components of fluoboric acid and an aqueous solution of soluble divalent lead. The concentration of fluorboric acid is 0.5-3 mole per liter and the concentration of divalent lead is 0.2-1.5 mole per liter. Some cations such as cadmium, manganese, cobalt, etc, can be added as cation additives, and some anions such as sulfate radical, chlorate radical, perchlorate radical, etc, can be added as anion additives. The rate of disposition and dissolution of lead dioxide and mental lead is very high in the fluorboric acid aqueous solution of the lead fluoborate. The electrode overpotential can be reduced and the rate of electrodes can be improved by adding cation and annion additives in the electrolyte. The electrolyte can be directly used as a liquid flow battery with deposition type lead dioxide as an anode, having advantages of high conductivity, long cycle life, low cost and stable quality.

Description

technical field [0001] The invention belongs to the field of electrochemical engineering and industrial devices, and in particular relates to an electrolyte for a lead liquid flow battery, which is used to form the electrolyte of a flow battery suitable for using lead dioxide as a positive electrode. Background technique [0002] The sustainable development of energy supply has become a serious challenge of the 21st century. Vigorously developing renewable energy such as wind energy and solar energy is one of the important ways to achieve sustainable development and low-carbon economy, and it is also a basic national policy of our country. Electricity storage is an effective method to solve the instability problem of renewable energy, which can realize large-scale application of renewable energy, and is conducive to national security, stability, and sustainable economic and social development. [0003] Among the chemical storage batteries, the flow battery (Flow cell, Flow ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/18
CPCY02E60/528Y02E60/50
Inventor 程杰文越华刘东阳徐艳曹高萍杨裕生
Owner NO 63971 TROOPS PLA
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