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Positive and negative electrode electrolyte and preparation method thereof, and application of positive and negative electrode electrolyte in A14-model flow battery

A cathode electrolyte and anode electrolyte technology, applied in the field of electrochemistry, can solve the problems of low cost, low energy density of flow batteries, hindering wide commercial application, etc., and achieve the effect of low cost and high energy density

Inactive Publication Date: 2019-07-12
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low energy density and cost-effectiveness of flow batteries have become two factors hindering its widespread commercial application.

Method used

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  • Positive and negative electrode electrolyte and preparation method thereof, and application of positive and negative electrode electrolyte in A14-model flow battery
  • Positive and negative electrode electrolyte and preparation method thereof, and application of positive and negative electrode electrolyte in A14-model flow battery
  • Positive and negative electrode electrolyte and preparation method thereof, and application of positive and negative electrode electrolyte in A14-model flow battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: prepare 100mL 0.02M K 3 Fe(CN) 6 +0.02M C 6 h 12 N 4 / HCl+0.02M NaCl electrolyte

[0039] First weigh 0.002mol K 3 Fe(CN) 6 , put in a 250mL beaker, add 50mL of water, stir well; then add 0.002mol C 6 h 12 N 4 , 0.002mol / HCl, fully stirred; then sequentially add 0.002molNaCl, add water until the solution is 100mL, and fully stir to obtain the desired prepared electrolyte.

Embodiment 2

[0040] Embodiment 2: prepare 100mL 0.4M K 3 Fe(CN) 6 +0.8M C 6 h 12 N 4 / HCl+0.8M NaCl electrolyte

[0041] First weigh 0.04mol K 3 Fe(CN) 6 , put in a 250mL beaker, add 50mL of water, stir well; then add 0.08mol C 6 h 12 N 4 , 0.08mol / HCl, fully stirred; then sequentially add 0.08molNaCl, add water until the solution is 100mL, and fully stir to obtain the desired prepared electrolyte.

Embodiment 3

[0042] Embodiment 3: preparation 100mL 0.8M K 3 Fe(CN) 6 +1.6M C 6 h 12 N 4 / HCl+1.6M NaCl electrolyte

[0043] First weigh 0.08mol K 3 Fe(CN) 6 , put in a 250mL beaker, add 50mL of water, stir well; then add 0.16mol C 6 h 12 N 4 , 0.16mol / HCl, fully stirred; then sequentially add 0.16molNaCl, add water until the solution is 100mL, and fully stir to obtain the desired prepared electrolyte.

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Abstract

The invention relates to a positive and negative electrode electrolyte and a preparation method thereof, and application of a positive and negative electrode electrolyte in an A14-model flow battery,belongs to the field of electrochemistry and can be widely applied to new energy large-scale energy storage. The active material of the negative electrode electrolyte in the A14-model flow battery isK3Fe(CN)6, and the constant pH of the active material of the negative electrode electrolyte is maintained by employing a hexamethylene tetramine-hydrochloric acid; the active material of the positiveelectrode electrolyte is Fe(3m4' hbpy)3C12, the constant pH of the active material positive electrode electrolyte is maintained by employing a glycine-hydrochloric acid; the solid energy storage materials of the positive and negative electrodes are Prussian blue Fe4[Fe(CN)6]3; and the intermediate K3Fe(CN)6 and the Fe(3m4' hbpy)3C12 are subjected to redox to achieve the transmission of electrons / charges between the positive and negative electrodes and the solid energy storage materials Fe4[Fe(CN)6]3. The energy density of the flow battery can reach more than twice of the energy density of a current all-vanadium redox flow battery, and the cost of the active material of the flow battery is only 1 / 10 of that of the current all-vanadium redox flow battery.

Description

technical field [0001] The present invention relates to a kind of positive and negative electrolyte and preparation method thereof and in A 14 The application in the model flow battery belongs to the field of electrochemistry and can be widely used in large-scale energy storage of new energy. Background technique [0002] Extensive use of renewable energy such as solar energy and wind energy to replace fossil energy is one of the best strategies to avoid the catastrophic consequences of the greenhouse effect. However, the intermittency of solar and wind energy poses great challenges to the safety management of the power grid. The development of smart grid requires a reliable energy storage device to regulate the input and output of power to achieve the highest energy utilization efficiency. Among various large-scale energy storage options, pumped hydro storage and compressed air energy storage are the most cost-effective, but both require special geographical and geologica...

Claims

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Application Information

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IPC IPC(8): H01M8/18
CPCH01M8/188Y02E60/50
Inventor 谢志鹏杨斌谢晨帆魏露露
Owner JIANGXI UNIV OF SCI & TECH
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