Room-temperature liquid metal battery

A liquid metal battery and liquid alloy technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of high operating temperature, safety risk, complex structure, etc., and achieve the effect of simple structure and easy design and manufacture

Active Publication Date: 2016-10-12
YUNNAN KEWEI LIQUID METAL VALLEY R & D CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the complex structure, high working temperature and potential safety risks of existing liquid metal batteries, the purpose of the present invention is to provide a room temperature liquid metal battery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The liquid metal battery includes three parts: positive liquid metal 1, ionic liquid 2, and negative liquid metal 3. The liquids of the three parts are in contact with each other in sequence, and they are positive liquid metal 1, ionic liquid 2, and negative liquid metal 3 from bottom to top. Positive liquid metal 1 has a melting point of 15.6°C and a density of 6.3g / cm -3 Gallium Indium Alloy GaIn 24.5 ; Negative electrode liquid metal 3 has a melting point of -12.6°C and a density of 0.855g / cm -3 Sodium Potassium Alloy Na 23.3 K 76.7 ; Ionic liquid 2 is 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM]BF 4 ), the melting point is -52.3℃, and the density is 1.34g / cm -3 , the density of the ionic liquid 2 is greater than that of the negative liquid metal 3 and less than that of the positive liquid metal 1 .

[0033] The preparation process of the liquid metal battery is as follows: the materials of the positive electrode, the spacer layer and the negative elect...

Embodiment 2

[0036] The thickness of the positive liquid metal 1 is 5 mm, the thickness of the ionic liquid 2 is 3 mm, and the thickness of the negative liquid metal 3 is 5 mm. The packaging layer 4 of the liquid metal battery is liquid paraffin covered on the negative liquid metal 3; the liquid metal battery shell 5 It is glass that does not react with the negative liquid metal 3, the ionic liquid 2, and the positive liquid metal 1; the material of the negative lead-out pole piece 6 of the battery and the positive lead-out pole piece 7 of the battery is copper. Schematic diagram of the structure of a liquid metal battery figure 1 shown. Other materials and preparation methods are the same as in Example 1.

[0037] The open circuit voltage of the liquid metal battery is 1.9V.

Embodiment 3

[0039]The thickness of the positive liquid metal 1 is 5 mm, the thickness of the ionic liquid 2 is 3 mm, and the thickness of the negative liquid metal 3 is 5 mm, and 5% KCl (accounting for the mass ratio of the ionic liquid) is added to the ionic liquid. The packaging layer 4 of the liquid metal battery is liquid paraffin covered on the negative liquid metal 3; the liquid metal battery shell 5 is a double-layer structure, the inner layer is plastic, and the outer layer is stainless steel, which can realize tight sealing; the battery case Open top. After evacuating through the opening of the shell and replacing it with argon gas, after sequentially adding the materials of the positive electrode, the spacer layer and the negative electrode into the battery shell, the argon gas forms the encapsulation layer; The material is copper. Other materials are with embodiment 1.

[0040] The open circuit voltage of the liquid metal battery is 2.0V.

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Abstract

The invention provides a room-temperature liquid metal battery which comprises an anode, a cathode, an interlayer and a battery shell. The anode is made of a gallium-based or mercury-based liquid alloy, the cathode is made of an alkali metal liquid alloy, the interlayer is ionic liquid, and the anode, the interlayer and the cathode are arranged in the battery shell from bottom to top. The cathode is made of the alkali metal liquid alloy, the anode is made of the gallium-based or mercury-based liquid alloy, electrolyte is the ionic liquid, and the three materials are liquid at room temperature, so that heating and heat insulating devices are not needed, and the room-temperature liquid metal battery can be realized really.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage batteries, and in particular relates to a battery based on liquid metal at room temperature and a preparation method thereof. Background technique [0002] As energy and environmental issues become increasingly prominent, renewable energy (such as wind energy, solar energy, etc.) plays an increasingly important role in reducing greenhouse gas emissions and achieving sustainable development. Since renewable energy may lead to grid instability when connected to the grid, there is an urgent need to develop large-scale energy storage technologies. According to the working principle, energy storage can be divided into physical energy storage, chemical energy storage and other forms of energy storage. Among them, chemical energy storage is mainly to develop efficient large-scale battery systems, such as lead-acid batteries, lithium-ion batteries, sodium-sulfur batteries, liquid flow batter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M10/39
CPCH01M4/38H01M4/381H01M10/399H01M2300/0025Y02E60/10
Inventor 王磊刘静
Owner YUNNAN KEWEI LIQUID METAL VALLEY R & D CO LTD
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