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Lithium/thionyl chloride battery electrolyte

一种锂亚硫酰氯电池、亚硫酰氯的技术，应用在锂离子电池领域，能够解决削弱锂/亚硫酰氯电池性能等问题，达到好抗亲核攻击能力、良好放电电压和放电容量、配方科学的效果

Pending Publication Date: 2020-12-11
裴广华
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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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Examples

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Embodiment 1

[0043]An electrolyte for a lithium thionyl chloride battery, comprising thionyl chloride, lithium bis(fluorosulfonyl)imide and additives, the molar concentration of the thionyl chloride solution of the electrolyte salt is 0.1 mol / L, and the mass of the additive is the total electrolyte 0.01% by mass, the additives include a first additive and a 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]Among them, X is Cl; R1Is a nitrile group; R2, R3All are hydrogen; R4For methyl.

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

[0048];

[0049]Where X1Is Cl; R11, R21, R31All are methyl; R41For pyrrole heterocyclyl.

[0050]A preparation method of lithium thionyl chloride battery electrolyte, the preparation method includes the following steps:

[0051](1) In a dry environment with a relative h...

Embodiment 2

[0059]An electrolyte for a lithium thionyl chloride battery includes thionyl chloride, lithium bisoxalate borate and additives. The molar concentration of the thionyl chloride solution of the electrolyte salt is 0.4 mol / L, and the weight of the additive is 0.1% of the total weight 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]Among them, X is Br; R1Is an amino group; R2, R3All are chloromethyl; R4It is ethyl.

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

[0064];

[0065]Where X1Br; R11, R21, R31All are chloromethyl; R41For furan heterocyclyl.

[0066]A preparation method of lithium thionyl chloride battery electrolyte, the preparation method includes the following steps:

[0067](1) In a dry environment with a relativ...

Embodiment 3

[0075]An electrolyte for a lithium thionyl chloride battery, comprising thionyl chloride, lithium trifluoromethanesulfonate and additives, the molar concentration of the thionyl chloride solution of the electrolyte salt is 0.6 mol / L, and the mass of the additive is 0.2 of the total mass of the electrolyte %, 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; R1Is hydroxyl; R2, R3All are phenyl; R4It is chloromethyl.

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

[0080];

[0081]Where X1I; R11, R21, R31All are methoxy; R41For thiophene heterocyclyl.

[0082]A preparation method of lithium thionyl chloride battery electrolyte, the preparation method includes the following steps:

[0083](1) In a dry environment with relative hu...

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Abstract

The invention discloses a lithium / thionyl chloride battery electrolyte which comprises thionyl chloride, electrolyte salt and additives, the additives comprise a first additive and a second additive,and the preparation method comprises the following steps: distilling thionyl chloride, collecting fractions, weighing electrolyte salt, dissolving the electrolyte salt in the thionyl chloride fraction, purifying the first additive, purifying the second additive, weighing the purified first additive and the purified second additive, and adding the first additive and the second additive into the 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 have a synergistic effect, so that the lithium / thionyl chloride battery obtains good discharge voltage and discharge capacity, and the voltage lag phenomenon of the lithium / thionyl chloride batteryis remarkably improved, and the lithium thionyl chloride battery prepared from the electrolyte has relatively good cycle performance and relatively high 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.Background technique[0002]Lithium / thionyl chloride (Li / SOCl2) The battery is a kind of lithium as the anode, carbon as the cathode carrier, thionyl chloride of anhydrous lithium tetrachloroaluminate (SOCl2) Lithium battery with solution as electrolyte. Lithium / thionyl chloride batteries have the characteristics of high specific energy, high 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 prospecting, instrumentation, etc. 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+2SOCl2→4LiCl+S+SO2, Sulfur and sulfur dioxide are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0525H01M10/42
CPCH01M10/0525H01M10/0567H01M10/4235H01M2300/0025H01M2300/0091Y02E60/10
Inventor 裴广华
Owner 裴广华
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