An organic system lithium quinone flow battery

An organic system and liquid flow battery technology, applied in organic electrolytes, fuel cells, regenerative fuel cells, etc., can solve problems such as low operating current density, increased battery polarization, and increased solution viscosity, and achieve a wide voltage tolerance range , Alleviate dendrite problem, wide temperature tolerance effect

Active Publication Date: 2019-07-16
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

2,2,6,6-Tetramethyl-1-piperidone (TEMPO) free radical flow battery, because the polarity of organic free radicals and solvents is similar, the solution concentration can reach 2.0mol L -1 , but the viscosity of the solution increases at higher concentrations, leading to increased polarization of the battery and lower operating current density
Due to the use of organic electrolyte, the battery has a wide temperature adaptability range, which overcomes the defect of poor low temperature performance of aqueous flow batteries

Method used

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  • An organic system lithium quinone flow battery
  • An organic system lithium quinone flow battery
  • An organic system lithium quinone flow battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The positive electrode electrolyte is 0.5mol L -1 p-Benzoquinone and 0.5mol L -1 Mixed solution of LiTFSI;

[0023] The negative electrode electrolyte is 0.5mol L -1 A solution of LiTFSI;

[0024] The non-aqueous solvent is a DOL / DME mixed solvent with a volume ratio of 1.0:1.0.

[0025] Example 1 battery cycle stability see figure 2 . The initial efficiency of the battery is 91% Coulombic efficiency, 81% voltage efficiency, and 73% energy efficiency. After about 20 charge-discharge cycles, the battery efficiency decays.

Embodiment 2

[0027] The positive electrolyte is 1.0mol L -1 p-Benzoquinone and 1.0mol L -1 Mixed solution of LiTFSI;

[0028] Negative electrolyte is 1.0mol L -1 A solution of LiTFSI;

[0029] The non-aqueous solvent is a DOL / DME mixed solvent with a volume ratio of 1.0:1.0.

Embodiment 3

[0031] The positive electrolyte is 1.5mol L -1 p-Benzoquinone and 1.5mol L -1 Mixed solution of LiTFSI;

[0032] Negative electrolyte is 1.5mol L -1 A solution of LiTFSI;

[0033] The non-aqueous solvent is a DOL / DME mixed solvent with a volume ratio of 1.0:1.0.

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Abstract

The invention relates to an organic system lithium quinone liquid flow battery. The positive electrode is a carbon material electrode, the negative electrode is a deposition type lithium electrode, and the electrolyte liquid storage tank is filled with electrolyte; the positive electrode electrolyte is quinones and bistrifluorosulfonyl A mixed solution of lithium amide (LiTFSI), the negative electrode electrolyte is LiTFSI solution, and the above solutions all use organic solvents. This type of flow battery has the characteristics of high electrochemical activity, high energy density, and simple assembly process.

Description

technical field [0001] The invention relates to an organic system lithium quinone liquid flow battery. Background technique [0002] Due to the problem of environmental pollution and the increasing shortage of energy sources, people are widely concerned about the development and utilization of renewable energy sources such as wind energy and solar energy. In order to solve the problems of discontinuous, unstable and unreliable power generation of renewable energy, it is necessary to vigorously develop efficient, cheap, safe and reliable energy storage technology to cooperate with it. Various energy storage technologies, liquid flow energy storage batteries are famous for their unique advantages. It has become one of the most suitable large-scale energy storage batteries at present. [0003] Compared with aqueous flow batteries, organic flow batteries have attracted extensive attention due to their advantages of completely avoiding side reactions of water electrolysis and wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/18
CPCH01M8/188H01M2300/0028Y02E60/50
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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