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Acidic zinc single liquid flow energy storage battery

An energy storage battery, acid technology, applied in the field of energy storage technology and its electrochemical engineering, can solve problems such as hydrogen evolution self-discharge reaction, and achieve the effect of improving charge-discharge performance and corrosion resistance

Inactive Publication Date: 2011-09-28
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is also like two sides of a coin. On the one hand, the high activity of zinc brings a great increase in the discharge voltage, but on the other hand, it also makes the zinc anode prone to hydrogen evolution self-discharge reaction in the acid electrolyte.

Method used

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  • Acidic zinc single liquid flow energy storage battery
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] After mixing 30 grams of lead hydroxide and 5 grams of 20% NaOH solution evenly, apply it on 4×6cm 2 On the titanium plate frame, in 20% NaOH alkaline solution at 10mA / cm 2 The current density of the anodic oxidation is carried out to make it generate α-lead dioxide by electrodeposition reaction, and then the pure α-lead dioxide (29 grams) obtained by electrolysis is cleaned and crushed, and then 7 grams of β-lead dioxide and β-lead dioxide are added. After 4 grams of freshly prepared lead sulfate are mixed evenly, a paste is made and coated on a commercially available lead-antimony alloy grid to make an electrode plate for subsequent use.

[0026] Extrude 5 grams of expanded graphite and 95 grams of polyethylene plastic at 185°C to form a 4×6cm 2 The conductive electrode is electroplated with lead-indium-tin-copper alloy on its surface, and the mass percentage of the coating composition is 85:2:9:4. With the graphite electrode as negative pole, 500ml 1M ZnSO 4 -1M H...

Embodiment 2

[0028] The positive electrode is prepared according to the same manufacturing process as in Example 1. The base conductive material of the negative electrode of the battery is based on a specific lead-containing brass alloy sheet (mass percentage of alloy metal Zn:Cu:Pb=30:65:5) Material, cut into an area of ​​40×60mm 2 , an alloy sheet with a thickness of 0.5mm, then electroplate 0.006mm thick lead on its surface, and then electroplate a 0.004mm thick lead-indium-tin-copper alloy layer with acid corrosion resistance and good conductivity on its surface, its The mass percentage of the coating composition is 85:2:9:4. Finally, the above-mentioned electrode matrix is ​​subjected to electrodeposition reaction in a composite acidic zinc sulfate electrolyte containing corrosion inhibition, and an electrolytic zinc layer with a thickness of 1.5 mm is electrodeposited to obtain a composite zinc negative electrode.

[0029] Take 500ml 1M ZnSO 4 -1.5M H 2 SO 4 -1M NaSO 4 -0.5g / L D...

Embodiment 3

[0031] The mixture of 65 grams of lead hydroxide and 40 grams of sodium hydroxide is carried out oxidation reaction in 200ml NaClO (available chlorine>19%) solution, and wherein lead hydroxide is oxidized into 60 grams of α-lead dioxide, then according to embodiment 1 same The method makes lead dioxide positive electrode. The negative electrode of the battery is made of reinforced polypropylene plastic with a thickness of 1mm, and a layer of metal copper with a thickness of 0.002mm is plated on the surface by ordinary electroless plating method, and then a 0.008mm thick lead-indium- Tin-copper alloy, the mass percentage of its coating composition is 85:2:9:4. The battery uses 1500ml 1M ZnSO 4 -1.5M H 2 SO 4 -0.5g / L manganese sulfate mixed solution is used as the electrolyte, and the HL-4B peristaltic pump is used as the power pump to circulate the electrolyte at a speed of 600 ml / h. 2 The current density can provide a discharge voltage of 2.05-2.15V, resulting in a capacit...

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Abstract

The invention discloses an acidic zinc single liquid flow energy storage battery. A single liquid flow battery system is a battery pack consisting of one or more battery monomers which are capable of filling or emptying electrolyte at the same time and connected with one another in series or in parallel, so that large-scale energy storage can be realized; and each of the battery monomers comprises a compound electrode which is used for depositing zinc and serves as an anode, low-acidity resistance lead dioxide serving as a cathode, compound acidic zinc sulfate which has a corrosion inhibitionfunction and serves as electrolyte, a relevant battery shell and an electrolyte storage tank. The working process of the single liquid flow battery system only needs one pump to recycle the electrolyte and a cation membrane is not needed, so the battery structure is simplified and the production cost of the battery is reduced; in an acidic environment, the chemical activity of zinc is high and hydrogen separation and dissolving reaction are easily performed on the zinc; due to a novel compound electrode, the compound electrolyte having the corrosion inhibition function and the structural design capable of emptying the electrolyte, the self discharging coefficient of the battery is reduced greatly, and high voltage efficiency and capacitance efficiency can be obtained, so the energy efficiency of the whole battery is improved.

Description

technical field [0001] The invention belongs to the field of energy storage technology and electrochemical engineering thereof, and is an electric energy storage device that can be used for peak regulation and frequency regulation when wind power generation and photovoltaic power generation are connected to the grid. Background technique [0002] With the continuous and rapid development of my country's economy and industry, the serious environmental pollution caused by the extensive use of fossil energy has prompted people to develop and utilize wind energy, solar energy, biomass energy, ocean energy and other renewable energy more and more widely. However, these renewable energies are greatly affected by weather and time periods, and are unstable. It is necessary to develop matching electric energy storage (energy storage) devices for peak regulation and frequency regulation to ensure that the quality of power in the grid is not affected by fluctuations. net effect. In ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/18H01M8/04
CPCY02E60/528Y02E60/50
Inventor 潘军青贾旭孙艳芝程杰杨裕生
Owner BEIJING UNIV OF CHEM TECH
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