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An organic solution flow battery

A liquid flow battery, an organic technology, applied in the field of organic system flow batteries, can solve the problems of discontinuous renewable energy, high wind and light curtailment rate, and regional environmental restrictions, and achieve excellent cycle stability and good environmental adaptability , the effect of high energy density

Active Publication Date: 2019-04-09
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these renewable energy sources are discontinuous, unstable, limited by the geographical environment, and difficult to connect to the grid, resulting in low utilization rate, high rate of wind and light abandonment, and waste of resources.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The positive electrolyte is 0.5mol L -1 MEPB and 0.5mol L -1 LiTFSI mixed solution;

[0030] The negative electrolyte is 0.5mol L -1 PMDA solution;

[0031] The non-aqueous solvent is a mixed solvent with a volume ratio of DME / DOL of 1:1.

[0032]

[0033] 3. Cyclic voltammetry test of positive electrode pair

[0034] The electrochemical workstation of American Gamary Company was used to test the electrochemical performance of the positive and negative electrode organic pair with a three-electrode system. The working electrode is a glassy carbon electrode (Tianjin Aida Hengsheng Company), the reference electrode and the counter electrode are lithium metal foils, the carbon powder dispersion is an isopropanol solution of activated carbon, and 0.05wt% Nafion is the binder. The scanning range of the positive and negative electrode pairs is 2.0V~4.0V, the scanning speed is 10, 25, 50, 75, 100mV / s, CV see figure 2 , The redox peak current is linearly fitted to one-half of the swee...

Embodiment 2

[0037] The positive electrolyte is 1.0mol L -1 MEP and 1.0mol L -1 LiTFSI mixed solution;

[0038] The anode electrolyte is 1.0mol L -1 PMDA solution;

[0039] The non-aqueous solvent is a mixed solvent with a volume ratio of DME / DOL of 1:1.

Embodiment 3

[0041] The positive electrolyte is 1.5mol L -1 MEP and 1.5mol L -1 LiTFSI mixed solution;

[0042] The negative electrolyte is 1.5mol L -1 PMDA solution;

[0043] The non-aqueous solvent is a mixed solvent with a volume ratio of DME / DOL of 1:1.

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Abstract

The invention relates to an organic liquid flow battery. The anode electrolyte is a bromide quaternary ammonium salt solution, the anode electrolyte is a bisanhydride solution, and the above solutions all use organic solvents. Among them, the one-electron redox reaction of quaternary ammonium bromide occurs at the positive electrode, and the two-electron redox reaction of bisanhydrides occurs at the negative electrode. Since the positive and negative electrodes of the battery use organic redox couples, no metal elements participate in the electrochemical reaction, the electrolyte is an organic system, and the redox couples can be electrochemically modified to adjust the electrode potential, so the battery has a wide voltage window, It has the characteristics of high energy density, simple assembly process, and low cost.

Description

Technical field [0001] The invention relates to the field of flow batteries, in particular to an organic system flow battery. Background technique [0002] With the rapid development of the human economy, environmental pollution and energy shortages have become increasingly serious, prompting countries around the world to develop and utilize renewable energy such as wind, solar, and tidal energy. However, these renewable energy sources are discontinuous, unstable, restricted by the geographical environment and difficult to connect to the grid, resulting in low utilization rate, high abandonment rate of wind and solar, and waste of resources. Therefore, it is necessary to vigorously develop high-efficiency, low-cost, safe and reliable energy storage technologies that can be used with them. Among various energy storage technologies, flow energy storage batteries have become one of the most suitable large-scale energy storage batteries at present due to their unique advantages. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/18
CPCH01M8/188H01M2300/0025Y02E60/50
Inventor 张华民席晓丽赖勤志李先锋
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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