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Positive or negative suspension electrolyte for flow battery and preparation method of positive or negative suspension electrolyte

A technology of electrolyte preparation and flow battery, which is applied in the field of electrochemistry, can solve problems such as pipeline blockage, reduce system efficiency, and reduce electron transmission, and achieve the effects of high conductivity, good suspension stability, and low viscosity

Inactive Publication Date: 2016-11-09
SHANGHAI ELECTRICGROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electrolytes with lower conductivity will reduce the transmission of electrons between the positive and negative active particles, the electrolyte and the current collector, while the higher viscosity positive and negative suspension electrolytes will not only reduce the efficiency of the system but also prone to pipe blockage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Lithium manganate is used as the positive electrode active material, lithium oxalate is used as the additive, KS-6 is used as the conductive agent, and 1M LiPF6 / (EC:DMC=1:1) is used as the electrolyte to prepare the positive electrode suspension electrolyte of lithium ion flow battery. Methods as below:

[0027] (1) Lithium manganate, lithium oxalate and KS-6 are screened to remove particles with a particle size less than 300nm;

[0028] (2) Carry out vacuum high-temperature baking and drying of the materials obtained by screening. The specific baking process is as follows: the degree of vacuum is -98, the baking temperature is 140°C, and the baking time is 24 hours;

[0029] (3) Take by weighing 2g lithium oxalate, add it in the electrolytic solution of 100ml, stir 30min, be mixed with solution;

[0030] (4) Weigh 5g of conductive agent KS-6, add it to the above solution, stir for 30min, and prepare a suspension;

[0031] (5) Weigh 70g of lithium manganese oxide, add...

Embodiment 2

[0034] Using natural graphite as negative electrode active material, lithium oxalate as additive, KS-6 as conductive agent, and 1M LiPF6 / (EC:DMC=1:1) as electrolyte to prepare lithium ion flow battery negative electrode suspension electrolyte, preparation method as follows:

[0035] (1) Selected natural graphite, lithium oxalate and KS-6 are screened to remove particles with a particle size less than 300nm;

[0036] (2) The materials obtained by screening are pretreated by vacuum high-temperature baking and drying. The specific baking process is as follows: the degree of vacuum is -72, the baking temperature is 100°C, and the baking time is 45 hours;

[0037] (3) Take by weighing 0.9g lithium oxalate, add it in the electrolytic solution of 60ml, stir 30min, be mixed with solution;

[0038] (4) Weigh 2g of KS-6, add it to the above solution, stir for 30min, and prepare a suspension;

[0039] (5) Weigh 30 g of natural graphite, add it to the above suspension, and stir for 1 ho...

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Abstract

The invention discloses a positive or negative suspension electrolyte for a flow battery and a preparation method of the positive or negative suspension electrolyte. The preparation method comprises the steps of screening and baking an active material, an additive and a conductive agent; adding the additive to an electrolyte for a lithium-ion battery to prepare a solution; adding the conductive agent to the solution to prepare a suspension liquid; and adding the active material to the suspension liquid to prepare a suspension electrolyte, from which particles of which the particle sizes are smaller than 400nm are screened and removed. The preparation method of the positive or negative suspension electrolyte for the flow battery has the advantages of being simple and easy to operate and suitable for massive production; by the preparation method disclosed by the invention, the suspension electrolyte suitable for a lithium-ion flow battery can be quickly prepared; and the prepared suspension electrolyte has the advantages of high conductivity, low viscosity and good suspension stability.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, in particular to a fluid battery positive and negative electrode suspension electrolyte and a preparation method thereof. Background technique [0002] Lithium-ion batteries are used in large-scale energy storage, and their advantages lie in high specific energy, high charge and discharge efficiency, fast charge and discharge, long cycle life, and low discharge rate; however, the biggest problem currently existing in energy storage lithium-ion batteries is that the cost is too high High, its cost is 1.5 to 2.0 times the construction cost of energy storage pumped hydropower station. For a MW-level energy storage power station, thousands of individual batteries are required to be connected in series and parallel, which undoubtedly increases the system cost and poses a great challenge to system security and system maintenance. [0003] The output power and energy storage capacity of the fl...

Claims

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Application Information

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IPC IPC(8): H01M10/0563
CPCH01M10/0563Y02E60/10
Inventor 蒿豪杨霖霖邸志岗李佳王少鹏倪蕾蕾
Owner SHANGHAI ELECTRICGROUP CORP
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