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Low-cost flow battery negative electrode electrolyte and preparation method therefor

An anode electrolyte and flow battery technology, which is applied in the field of low-cost flow battery anode electrolyte and its preparation, can solve the problems of restricting the large-scale use of flow batteries, high cost of use, limited earth storage, etc. The effect of a wide range of applications, cost reduction, and low performance

Inactive Publication Date: 2017-03-22
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the materials required for batteries, especially those metals used in redox reactions and noble metal materials used in catalysts, will generate hydrogen gas under acidic conditions, and the earth’s limited storage and high cost of use limit the large-scale use of flow batteries.
For example, the all-vanadium redox flow battery, which has attracted the most widespread attention, is the main problem that limits its development and large-scale application is the high cost. In addition, environmental protection is also a major consideration

Method used

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  • Low-cost flow battery negative electrode electrolyte and preparation method therefor

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Effect test

Embodiment 1

[0015] Weigh 28.05g KOH into a 250ml beaker, add appropriate amount of deionized water, stir to a constant volume of 500ml, weigh 0.6g1,8-DHAQ into a 250ml beaker, add an appropriate amount of 1M KOH solution, stir to a constant volume of 250ml, and then prepare The low-cost liquid flow battery negative electrode electrolyte of the present invention is composed of 0.01 mol / l 1,8-DHAQ and 1.0 mol / l KOH.

Embodiment 2

[0017] Weigh 28.05g KOH into a 250ml beaker, add appropriate amount of deionized water, stir to a constant volume of 500ml, weigh 6g of 1,8-DHAQ into a 250ml beaker, add an appropriate amount of 1M KOH solution, stir to a constant volume of 250ml, and then prepare this product The negative electrode electrolyte of the low-cost liquid flow battery described in the invention is composed of 0.1 mol / l 1,8-DHAQ and 1.0 mol / l KOH.

[0018] Adopt the low-cost liquid flow battery negative electrode electrolyte that embodiment 2 gains and K 4 Fe(CN) 6 Assembled into a flow battery, the flow rate of both positive and negative electrodes is 60ml / min. Put the flow battery at 100mA / cm 2 The charge and discharge test is completed at a current density of figure 1 is 1,8-DHAQ / K 4 Fe(CN) 6 The charge and discharge test curve of the flow battery.

Embodiment 3

[0020] Weigh 56.1g of KOH into a 250ml beaker, add appropriate amount of deionized water, stir to a constant volume of 500ml, weigh 60g of 1,8-DHAQ into a 250ml beaker, add an appropriate amount of 2M KOH solution, and stir to a constant volume of 250ml to prepare this product The low-cost liquid flow battery negative electrode electrolyte described in the invention is composed of 1 mol / l 1,8-DHAQ and 2.0 mol / l KOH.

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Abstract

The invention belongs to the field of a flow battery, and discloses a low-cost negative electrode electrolyte and a preparation method therefor. The low-cost flow battery negative electrode electrolyte is a negative electrode electrolyte based on a potassium hydroxide solution of small organic molecule 1, 8-dihydroxy anthraquinone (DHAQ). The preparation method for the low-cost flow battery negative electrode electrolyte comprises following steps of preparing 1M of KOH solution, adding an electrolyte raw material 1, 8-dihydroxy anthraquinone or derivative thereof or a mixture into the 1M KOH solution, dissolving and mixing uniformly, and performing constant volume by the 1M KOH solution to obtain the low-cost flow battery negative electrode electrolyte. The flow battery has the advantages of simple structure, low material cost, high energy density and high power density, and the like; and compared with an all-vanadium redox flow battery, the cost of the low-cost flow battery is reduced by 40%, so that the low-cost flow battery is quite suitable for being used as large-scale electric energy storage equipment for regulating peak and filling valley for a power grid.

Description

[0001] Technical field: [0002] 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. [0003] Background technique: [0004] With the increasing problems of resource shortage, environmental pollution, and population expansion, the original energy structure based on fossil fuels such as oil, natural gas, and coal can no longer meet the needs of human progress. Therefore, new energy sources are developed and wind energy and solar energy are fully utilized. Clean energy is imminent. However, both wind energy and solar energy are easily affected by the environment, resulting in intermittency and instability. In order to be truly applied in daily life, it is necessary to use cheap and high-performance energy storage technology to store energy when there is surplus energy. It can be used in case of power shortage, so as to realize the peak-shaving and valley-fill...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/18
CPCH01M8/188H01M2300/0025Y02E60/50
Inventor 李昕李鸽
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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