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A21 type high-energy-density battery, and positive and negative electrolyte and a preparation method thereof

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

Inactive Publication Date: 2019-06-18
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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  • A21 type high-energy-density battery, and positive and negative electrolyte and a preparation method thereof
  • A21 type high-energy-density battery, and positive and negative electrolyte and a preparation method thereof
  • A21 type high-energy-density battery, and positive and negative electrolyte and a preparation method thereof

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 an A21 type high-energy-density battery and a positive and negative electrolyte and a preparation method thereof, belongs to the field of electrochemistry, and can be widely applied to large-scale energy storage of new energy. In the A21 type high-energy-density battery, the active substance of the negative electrolyte is K3Fe(CN)6, and the constant pH is maintained by hexamethylene tetramine-hydrochloric acid; the active substance of the positive electrolyte is Fe(5m5'hbpy)3Cl2, and the constant pH value is maintained by glycine-hydrochloric acid; the positive and negative solid energy storage materials are both prussian blue Fe4[Fe(CN)6]3; and transfer of electrons / charges between the positive and negative electrodes and the solid energy storage materials Fe4[Fe(CN)6]3 is realized by oxidation reduction of an intermediate body K3Fe(CN)6 and Fe(5m5'hbpy)3Cl2. The energy density can reach more than two times of that of an existing all-vanadium redox flow battery, while the cost of the active material is only one tenth of that of the existing all-vanadium redox flow battery.

Description

technical field [0001] The present invention relates to a 21 The invention relates to a high-energy-density battery, positive and negative electrolytes and a preparation method thereof, which belong to the field of electrochemistry and can be widely used in large-scale energy storage of new energy sources. 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...

Claims

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Application Information

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IPC IPC(8): H01M8/18
CPCY02E60/50
Inventor 谢志鹏杨斌袁华丽谢晨帆
Owner JIANGXI UNIV OF SCI & TECH