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Zinc-iodine flow battery

A flow battery and iodine solution technology, applied in the field of zinc-iodine flow batteries, can solve the problems of low battery energy density, limited application fields, storage, transportation and high material costs

Active Publication Date: 2016-07-06
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the relatively mature systems include all-vanadium flow battery, zinc-cerium flow battery, zinc-bromine flow battery and sodium-bromine polysulfide flow battery, etc., but the energy density of the above batteries is low, and the storage, transportation and material costs are high. , which limits its field of application

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0015] 1. Electrolyte configuration:

[0016] Positive electrode electrolyte: 40ml aqueous solution containing 0.1moldm -3 I 2 , 1 mold m -3 KI and 0.03moldm -3 LiI.

[0017] Negative electrode electrolyte: 40ml aqueous solution, which contains 1moldm -3 ZnSO 4 .

[0018] 2. Battery assembly:

[0019] Single cell positive terminal plate, positive pole (3x3cm 2 graphite felt), separator (Nafion115), negative electrode (3x3cm 2 graphite felt), negative terminal plate; single cell structure and system see figure 1 .

[0020] 3. Battery test:

[0021] The electrolyte flow rate is 5ml / min, and the charge and discharge current density is 10mA / cm 2 , The charging time is 1h, and the discharge cut-off voltage is 0.8V. See from battery performance figure 2 It can be seen that the average energy efficiency of the battery reaches about 73%.

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Abstract

The invention provides a zinc-iodine flow battery, which comprises a battery module, a positive electrolyte storage tank, a negative electrolyte storage tank, a circulating pump and a circulating pipeline, wherein the battery module is formed by connecting more than one or two of single batteries in series; each single battery comprises a positive end plate, a negative end plate, a positive electrode, a negative electrode and a membrane; the negative oxidation-reduction couple is Zn<2+> / Zn; and the positive oxidation-reduction couple is I3<-> / I<->. The energy density of the battery is high; and meanwhile, the zinc-iodine flow battery has the characteristics of being long in cycle lifetime, low in cost, simple in structure and simple in manufacturing technology.

Description

technical field [0001] The invention relates to a zinc-iodine liquid flow battery, which can be widely used in chemical power sources, electric vehicles, electronics industry, mining and metallurgy and other fields. technical background [0002] With the continuous increase of population and the improvement of living standards, people's demand for energy is soaring. Traditional fossil energy will not be able to meet people's needs in the near future. Therefore, the development and utilization of renewable energy such as wind energy and solar energy are subject to extensive attention. However, these renewable energy sources are discontinuous, unstable, limited by regional environment, and unconnected to the grid, resulting in low utilization rate, high wind and light abandonment rate, and waste of resources. Energy storage technology can improve the utilization rate and stability of renewable energy through the storage and release of energy, and is a key technology for the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M8/18
CPCY02E60/50
Inventor 张华民程元徽赖勤志李先锋席晓丽王郴慧
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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