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Low-cost flow battery anode electrolyte and preparation method thereof

A negative electrolyte and flow battery technology, applied in electrode manufacturing, battery electrodes, circuits, etc., can solve problems such as excessive cost and restrictions on the large-scale use of flow batteries, and achieve cost reduction, elimination of energy storage obstacles, and cost Reduced effect

Inactive Publication Date: 2015-08-12
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the storage volume and cost of materials required for batteries, especially those metals for redox activity and noble metal materials for catalysts, limit the large-scale use of flow batteries. [6,7]
For example, the all-vanadium redox flow battery, which has attracted the most widespread attention, is the main problem limiting its development and large-scale application because of its high cost. In addition, environmental protection is also a major problem.

Method used

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  • Low-cost flow battery anode electrolyte and preparation method thereof
  • Low-cost flow battery anode electrolyte and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 3.4g ARS into a 250ml beaker, add appropriate amount of deionized water, stir to dissolve, remove sodium ions with ion exchange resin, then add 5.6ml 98% H 2 SO 4 , stirring and constant volume to 100ml, the low-cost flow battery negative electrode electrolyte of the present invention can be prepared, and its composition is 0.1mol / l ARS, 1.0mol / l H 2 SO 4 .

[0016] The low-cost liquid flow battery negative electrode electrolyte obtained in Example 1 was used to assemble a flow battery with HBr, and the positive and negative electrode flow rates were both 100ml / min. Put the flow battery at 100mA / cm 2 The charge and discharge test is completed under the current density, and the obtained test curve is as follows figure 1 shown. From figure 1 It can be seen that the overall charge and discharge performance is good.

Embodiment 2

[0018] Weigh 33.8g ARS into a 250ml beaker, add appropriate amount of deionized water, stir to dissolve, remove sodium ions with ion exchange resin, then add 11.2ml 98% H 2 SO 4 , stirring and constant volume to 100ml, the low-cost flow battery negative electrode electrolyte of the present invention can be prepared, and its composition is 1.0mol / l ARS, 2.0mol / l H 2 SO 4 .

[0019] The low-cost liquid flow battery negative electrode electrolyte obtained in Example 2 was used to assemble a flow battery with HBr, and the positive and negative electrode flow rates were both 120ml / min. Put the flow battery at 100mA / cm 2 The charge and discharge test is completed under the current density, and the obtained test curve is as follows figure 2 shown. From figure 2 It can be seen that the overall charge and discharge performance is good.

Embodiment 3

[0021] Weigh 203.1g ARS into a 250ml beaker, add appropriate amount of deionized water, stir to dissolve, remove sodium ions with ion exchange resin, then add 5.6ml 98% H 2 SO 4 , stirring and constant volume to 100ml, can prepare low-cost flow battery negative electrode electrolyte of the present invention, and its composition is 6.0mol / l ARS, 1.0mol / l H 2 SO 4 .

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Abstract

The invention belongs to the field of flow batteries and discloses low-cost anode electrolyte and a preparation method thereof. The low-cost flow battery anode electrolyte is based on a sulfuric acid solution of small organic molecule 1,2-dihydroxy anthraquinone-3-sodium sulfonate (ARS). The preparation method of the low-cost flow battery anode electrolyte comprises the following steps: adding electrolyte raw material 1,2-dihydroxy anthraquinone-3-sodium sulfonate or derivatives thereof or a mixture of the 1,2-dihydroxy anthraquinone-3-sodium sulfonate and derivatives thereof in water, dissolving and evenly mixing the added materials, using ion exchange resin to remove positive ions, then adding supporting electrolyte sulfuric acid, and diluting the obtained solution to a preset volume to obtain the low-cost flow battery anode electrolyte. The flow battery is simple in structure, low in cost, high in energy density and watt density. Compared with a vanadium flow battery, the flow battery using the anode electrolyte provided by the invention is 50% lower in cost. The flow battery can be used as a large-scale electric energy storage device in a wind energy and solar power system, and can be used for regulating peak load, supplying power for remote areas and providing uninterruptible power supply.

Description

Technical field: [0001] The invention relates to the field of liquid flow batteries, in particular to a low-cost liquid flow battery negative electrode electrolyte and a preparation method thereof. Background technique: [0002] The energy crisis and environmental pollution have made countries around the world devote themselves to the development of efficient and clean renewable energy to reduce and replace fossil energy. Among them, the development of energy technologies such as solar energy and wind energy has attracted a lot of attention. However, there is a mismatch between solar and wind power generation and the needs of the grid. The power generation of solar and wind power will be intermittent and discontinuous with different sunlight and wind power, and with the widespread use of these energy technologies, this mismatch will The problem will get worse. Therefore, it is important to develop cheap and high-performance energy storage technology to regulate it, store t...

Claims

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Application Information

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IPC IPC(8): H01M4/60H01M4/04
CPCH01M4/04H01M4/60Y02E60/10
Inventor 李昕张舒
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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