Application of lii-ki eutectic salt in low temperature liquid molten salt lithium battery, low temperature liquid molten salt lithium battery and preparation method

A low-temperature liquid, lithium battery technology, applied in the direction of lithium battery, electrolyte battery manufacturing, secondary battery, etc., can solve the problem of high operating temperature and high melting point of the battery, and achieve the effect of small resistance, excellent electrical conductivity, and good charge-discharge cycle.

Active Publication Date: 2021-02-05
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 molten salt lithium battery, low temperature liquid molten salt lithium battery and preparation method
  • Application of lii-ki eutectic salt in low temperature liquid molten salt lithium battery, low temperature liquid molten salt lithium battery and preparation method
  • Application of lii-ki eutectic salt in low temperature liquid molten salt lithium battery, low temperature liquid molten salt lithium battery and preparation method

Examples

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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 in proportion (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 particles into t...

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 an application of a 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, belonging to the field of lithium batteries. The invention provides the application of a LiI-KI eutectic salt as an electrolyte in a low-temperature liquid molten salt lithium battery. In the present invention, the eutectic temperature of the LiI-KI eutectic salt as the electrolyte is 260-265° C., and the operation temperature of the fully liquid molten salt lithium battery can be realized below 300° C. The experimental results show that the low-temperature liquid molten salt lithium battery provided by the present invention has a good charge-discharge cycle, the open circuit voltage is 0.76V, the discharge platform voltage is stable at 0.5-0.6V, the discharge platform is 0.8-0.9V, and the Coulombic efficiency is basically stable 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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Patent Type & Authority Patents(China)
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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