Lithium/thionyl chloride battery electrolyte and preparation method thereof

A thionyl chloride battery and thionyl chloride technology, applied in the field of lithium-ion batteries, can solve the problems of weakening the performance of lithium/thionyl chloride batteries, achieve good resistance to nucleophilic attack, suppress the loss of Li2O, and improve voltage hysteresis Effect

Active Publication Date: 2019-05-10
江苏中禄满新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some of the above methods can improve certain performances of lithium / thionyl chloride batteries to a certain extent, but some of them weaken the other properties of lithium / thionyl chloride batteries at the cost of "sacrificing" the capacity of lithium / thionyl chloride batteries. some performance

Method used

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  • Lithium/thionyl chloride battery electrolyte and preparation method thereof
  • Lithium/thionyl chloride battery electrolyte and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A lithium / thionyl chloride battery electrolyte, including thionyl chloride, bis(fluorosulfonyl)imide lithium and additives, the molar concentration of the thionyl chloride solution of the electrolyte salt is 0.1mol / L, and the quality of the additives is the electrolyte 0.01% of the total mass, the additives include the first additive and the second additive, wherein the mass of the first additive is 0.005% of the total mass of the electrolyte, and the mass of the second additive is 0.005% of the total mass of the electrolyte.

[0044] The structural formula of the first additive is:

[0045] ;

[0046] Wherein, X is Cl; R 1 is a nitrile group; R 2 , R 3 Both are hydrogen; R 4 For methyl.

[0047] The structural formula of the second additive is:

[0048] ;

[0049] Among them, X 1 is Cl; R 11 , R 21 , R 31 Both are methyl; R 41 For pyrrole heterocyclyl.

[0050] A kind of preparation method of lithium / thionyl chloride battery electrolyte, this preparati...

Embodiment 2

[0059] A lithium / thionyl chloride battery electrolyte, including thionyl chloride, lithium bisoxalate borate and additives, the molar concentration of the thionyl chloride solution of the electrolyte salt is 0.4mol / L, and the quality of the additives is 0.1% of the total mass of the electrolyte , the additives include a first additive and a second additive, wherein the mass of the first additive is 0.05% of the total mass of the electrolyte, and the mass of the second additive is 0.05% of the total mass of the electrolyte.

[0060] The structural formula of the first additive is:

[0061] ;

[0062] Wherein, X is Br; R 1 is an amine group; R 2 , R 3 Both are chloromethyl; R 4 For ethyl.

[0063] The structural formula of the second additive is:

[0064] ;

[0065] Among them, X 1 for Br; R 11 , R 21 , R 31 Both are chloromethyl; R 41 For furan heterocyclyl.

[0066] A kind of preparation method of lithium / thionyl chloride battery electrolyte, this preparation ...

Embodiment 3

[0075] A lithium / thionyl chloride battery electrolyte, including thionyl chloride, lithium trifluoromethanesulfonate and additives, the molar concentration of the thionyl chloride solution of the electrolyte salt is 0.6mol / L, and the quality of the additives is the total mass of the electrolyte 0.2%, the additive includes a first additive and a second additive, wherein the mass of the first additive is 0.1% of the total mass of the electrolyte, and the mass of the second additive is 0.2% of the total mass of the electrolyte.

[0076] The structural formula of the first additive is:

[0077] ;

[0078] Among them, X is I; R 1 is hydroxyl; R 2 , R 3 Both are phenyl; R 4 For chloromethyl.

[0079] The structural formula of the second additive is:

[0080] ;

[0081] Among them, X 1 for I; R 11 , R 21 , R 31 Both are methoxy; R 41 For thiophene heterocyclic group.

[0082] A kind of preparation method of lithium / thionyl chloride battery electrolyte, this preparati...

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Abstract

The invention discloses a lithium / thionyl chloride battery electrolyte and a preparation method thereof. The lithium / thionyl chloride battery electrolyte comprises thionyl chloride, electrolyte saltsand additives, wherein the additives comprise a first additive and a second additive. The preparation method comprises the following steps that the thionyl chloride is distilled, and cut fraction is collected; the electrolyte salt is weighed and dissolved in the thionyl chloride cut fraction; purification of the first additive is carried out; purification of the second additive is carried out; andthe purified first additive and the purified second additive are weighed and added into a thionyl chloride solution of the electrolyte salt to obtain the lithium / thionyl chloride battery electrolyte.The first additive and the second additive in the lithium / thionyl chloride battery electrolyte act synergistically so as to enable a lithium / thionyl chloride battery to obtain good discharge voltageand discharge capacity, the voltage hysteresis phenomenon of the lithium / thionyl chloride battery is obviously avoided, and the lithium / thionyl chloride battery prepared from the electrolyte has better cycle performance and higher safety.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a lithium / thionyl chloride battery electrolyte and a preparation method thereof. Background technique [0002] Lithium / thionyl chloride (Li / SOCl 2 ) battery is a lithium as an anode, carbon as a cathode carrier, anhydrous lithium tetrachloroaluminate thionyl chloride (SOCl 2 ) solution as the lithium battery electrolyte. Lithium / thionyl chloride batteries have the characteristics of high specific energy, large specific power, stable discharge voltage, and long storage life. They are widely used in military and civilian industries such as aerospace, underwater weapons, navigation equipment, geological exploration, and instrumentation. application. Lithium / thionyl chloride battery is currently the battery with the highest specific energy and specific power in the battery field. The overall reaction mechanism of lithium / thionyl chloride battery is: 4Li+2SOCl 2 →4L...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/052H01M10/42
CPCH01M10/0525H01M10/0567H01M10/4235H01M2300/0025H01M2300/0091Y02E60/10
Inventor 裴广华
Owner 江苏中禄满新材料科技有限公司
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