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Application of LiI-KI eutectic salt in low-temperature liquid state molten salt lithium battery, and low-temperature liquid state molten salt lithium battery and preparation method thereof

A low-temperature liquid lithium battery technology, applied in the manufacture of lithium batteries, electrolyte batteries, secondary batteries, etc., can solve the problems of high melting point and high battery operating temperature, and achieve the effects of low resistance, excellent conductivity, and good charge-discharge cycle

Active Publication Date: 2019-08-20
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, liquid metal batteries have not entered the market, mainly because most of their molten salt electrolyte materials are based on lithium chloride, lithium bromide, etc., and the melting point is too high, which makes it difficult to solve the problem of high operating temperature of the battery (above 400°C).

Method used

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  • Application of LiI-KI eutectic salt in low-temperature liquid state molten salt lithium battery, and low-temperature liquid state molten salt lithium battery and preparation method thereof
  • Application of LiI-KI eutectic salt in low-temperature liquid state molten salt lithium battery, and low-temperature liquid state molten salt lithium battery and preparation method thereof
  • Application of LiI-KI eutectic salt in low-temperature liquid state molten salt lithium battery, and low-temperature liquid state molten salt lithium battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] The present invention also provides a preparation method for the low-temperature liquid molten salt lithium battery, comprising the following steps:

[0037] After the graphite crucible and alumina crucible are wiped with alcohol, washed with water, dried and cooled to room temperature in sequence, the obtained alumina crucible is put into the obtained graphite crucible, and then the thermocouple of the temperature control device is inserted into the hole of the obtained graphite crucible to complete Basic assembly of low temperature liquid molten salt lithium battery housing container;

[0038] Putting the bismuth-tin alloy into the graphite crucible, heating and melting it and placing it on the bottom of the obtained alumina crucible to complete the preparation of the positive electrode of the low-temperature liquid molten salt lithium battery;

[0039] Add LiI-KI eutectic salt and lithium particles into the obtained alumina crucible in order to obtain a three-layer b...

Embodiment 1

[0048] The graphite crucible and the alumina crucible were wiped with alcohol, washed with water, and placed in an oven for 8 hours. Take it out and cool to room temperature, put the alumina crucible into the graphite crucible, and then insert the temperature control device into the hole of the graphite crucible to complete the basic assembly of the battery shell container.

[0049] Weigh 40 grams of bismuth-tin alloy and put it into a graphite crucible, heat it at 200° C. for 1 hour, melt it and place it on the bottom of the battery, and complete the preparation of the positive electrode of the battery. Then cool to room temperature. Weigh the lithium particles in the glove box, put them into a beaker and seal them with sealing paper, then weigh the LiI-KI electrolyte according to the ratio (molar ratio 58:42), put it into a mortar and grind for 30 minutes, and then pour it into the beaker. After taking it out of the glove box, pour the electrolyte powder and lithium particl...

Embodiment 2

[0063] Same as Example 1, the only difference is that the molar ratio of LiI and KI in the LiI-KI eutectic salt electrolyte is 60:40.

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Abstract

The invention provides application of a LiI-KI eutectic salt in a low-temperature liquid state molten salt lithium battery, and a low-temperature liquid state molten salt lithium battery and a preparation method thereof, belonging to the field of lithium batteries. The present invention provides the application of the LiI-KI eutectic salt in the low-temperature liquid state molten salt lithium battery. The eutectic temperature of the LiI-KI eutectic salt taken as an electrolyte is 260-265 DEG C so that it is achieved that the whole liquid state molten salt lithium battery can work at an operation temperature below 300 DEG C. The experiment result shows that: The low-temperature liquid state molten salt lithium battery has good charge-discharge cycles, the open-circuit voltage is 0.76V, thedischarge platform voltage is stabilized at 0.5-0.6V, the discharge platform voltage is 0.8-0.9V, and the coulombic efficiency is basically stabilized at about 97%.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to an application of LiI-KI eutectic salt in a low-temperature liquid molten salt lithium battery, a low-temperature liquid molten salt lithium battery and a preparation method thereof. Background technique [0002] With the rapid development of the global economy, along with more and more energy storage and environmental problems, the continuous consumption of fossil energy leads to the continuous emission of carbon dioxide and other greenhouse gases, which in turn leads to global warming. Therefore, in order to save non-renewable energy, it is necessary to continuously develop new energy equipment and improve energy utilization. Solar energy and wind energy are excellent renewable energy sources, but due to their intermittency and volatility, if they are directly connected to the power generation network, they will cause serious safety problems and affect the reliability...

Claims

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Application Information

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IPC IPC(8): H01M10/0563H01M10/058H01M10/052
CPCH01M10/052H01M10/0563H01M10/058Y02E60/10Y02P70/50
Inventor 卢惠民于浩曹媛胡雪琦
Owner BEIHANG UNIV
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