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Diaphragm-free static zinc-bromine battery

A zinc-bromine battery without diaphragm technology, which is applied in the direction of secondary batteries, circuits, electrical components, etc., can solve the problems of large internal resistance of the battery, and achieve the effects of reducing battery cost, simple system structure, and reducing system loss

Active Publication Date: 2018-06-08
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the prior art, the zinc-bromine flow battery has a cavity structure inside the battery, and the internal resistance of the battery is large

Method used

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  • Diaphragm-free static zinc-bromine battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Battery assembly:

[0029] The positive electrode uses carbon felt with a size of 4x4x0.5cm, and the negative electrode uses a graphite plate with a size of 6.5x 6.5x0.2cm. The electrolyte is 2MZnBr 2 +3MKCl+0.4M MEP.

[0030] The single cell sequentially includes a positive terminal plate with a liquid storage box, a positive current collector, a positive electrode, a gasket frame, a negative current collector, and a negative terminal plate with a liquid filling box. The effective area of ​​the battery electrode is 4cm 2 , charge and discharge current density: 10mA / cm 2 , the charging time is 10min, the battery performance is as follows figure 2 . The battery Coulombic efficiency is 95%, the voltage efficiency is 89%, and the energy efficiency is 85%.

Embodiment 2

[0032] Battery assembly:

[0033] The positive electrode uses carbon felt with a size of 4x4x0.5cm, and the negative electrode uses a graphite plate with a size of 6.5x 6.5x0.2cm. The electrolyte is 2MZnBr 2 +3MKCl+0.4M MEP.

[0034] The single cell sequentially includes a positive terminal plate with a liquid storage box, a positive current collector, a positive electrode, a gasket frame, a negative current collector, and a negative terminal plate with a liquid filling box. The effective area of ​​the battery electrode is 4cm 2 , charge and discharge current density: 15mA / cm 2 , the charging time is 10min, the battery performance is as follows image 3 . The battery Coulombic efficiency is 95%, the voltage efficiency is 85%, and the energy efficiency is 81%.

Embodiment 3

[0036] Battery assembly:

[0037] The positive electrode uses carbon felt with a size of 4x4x0.5cm, and the negative electrode uses a graphite plate with a size of 6.5x 6.5x0.2cm. The electrolyte is 2MZnBr 2 +3MKCl+0.4M MEP.

[0038] A single cell includes a positive terminal plate with a liquid storage box, a positive current collector, a positive electrode, a gasket frame, a negative current collector, and a negative terminal plate with a liquid filling box in sequence. The battery is assembled from left to right. Electrode effective area 4cm 2 , charge and discharge current density: 15mA / cm 2 , the charging time is 10min, the battery performance is as follows Figure 4 . The battery Coulombic efficiency is 90%, the voltage efficiency is 85%, and the energy efficiency is 77%. The coulombic efficiency of batteries assembled from left to right is 5% lower than that of batteries assembled by top-down, indicating that the self-discharge of batteries assembled by top-down i...

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Abstract

The invention discloses a diaphragm-free static zinc-bromine battery. The battery mainly comprises a positive terminal plate with a liquid storage box, a positive current collector, a positive pole, apad frame, a negative current collector and a negative terminal plate with a liquid feeding box. On the one hand, the cost of the zinc-bromine battery can be reduced because a diaphragm is not used;on the other hand, devices such as a circulation pump and an electric valve required by an electrolyte circulation system are not used, so that system loss is reduced, and the system structure of thebattery is simpler.

Description

technical field [0001] The invention relates to a non-diaphragm static zinc-bromine battery. technical background [0002] Renewable energy is gradually changing from auxiliary energy to dominant energy. However, due to the discontinuous, unstable and uncontrollable unsteady characteristics of renewable energy, the popularization and application of renewable energy requires the deployment of large-scale (large power and large capacity) energy storage technology. Therefore, large-scale energy storage technology is a research hotspot at home and abroad. Zinc-bromine redox flow battery (ZBB) is a kind of energy storage battery. Its main features are simple structure, easy design, cheap price, wide source, environmental friendliness, long service life, etc. It is mainly used in Wind energy, solar energy and other renewable energy power generation, power grid peak regulation, uninterruptible power supply and other fields. [0003] During the charging and discharging process, t...

Claims

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Application Information

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IPC IPC(8): H01M10/36H01M10/38
CPCH01M10/365H01M10/38Y02E60/10Y02P70/50
Inventor 许鹏程张华民李先锋赖勤志
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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