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Lithium battery electrolyte and obtained lithium primary battery

An electrolyte and lithium battery technology, which is applied in the field of lithium primary batteries, can solve the problems of shortening the service life of the battery, the battery cannot work normally, and the battery is heated and exploded, so as to prevent the peeling of the graphite layer, improve the electrochemical performance, and solve the problem of poor safety. Effect

Active Publication Date: 2016-10-12
HUIZHOU HUIDERUI LITHIUM BATTERY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the safety issues of lithium primary batteries have always attracted much attention. The main reason is that most of the lithium primary batteries produced in the market currently contain combustion-supporting lithium salts (such as lithium perchlorate). Under extreme conditions such as lithium salts, it is easy to react violently with the electrolyte, causing the electrolyte to burn, and the inside of the battery is heated and exploded.
In the production of high-discharge rate primary lithium batteries, high-conductivity fluorine-containing lithium salts (such as lithium bistrifluoromethanesulfonylimide and lithium perfluoroalkylsulfonylimide) are often added. The process will corrode the aluminum foil, destroy the passivation film of the aluminum foil, and make the battery unable to work normally, thereby greatly shortening the service life of the battery

Method used

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  • Lithium battery electrolyte and obtained lithium primary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Manganese dioxide, conductive agent carbide, and binder are selected as the positive electrode active material, and pure water is added to stir until uniform, and the dispersed positive electrode active material slurry is coated on the positive electrode aluminum foil current collector, and then cut into the positive electrode of the battery after rolling piece. After the positive electrode sheet is dried and completely removes the moisture in it, it is placed in an environment with a relative humidity below 1.0%, and a porous separator is inserted between the negative electrode (metal aluminum or lithium aluminum alloy) and the positive electrode sheet to separate the positive and negative electrodes. The membrane is wound into a cylindrical cell, and the wound cell is put into the battery casing (the casing is a steel casing, an aluminum casing or an aluminum-plastic film), and the battery is assembled by injecting liquid.

[0016] In the electrolyte part, use xLiFSI—...

Embodiment 2

[0018] In the same manner as in Example 1, the positive electrode material is selected from carbon monofluoride, and xLiFSI—yLiClO is used 4 As a mixed lithium salt (45% e -PC f As an anti-corrosion agent (wherein the concentration of LiBOB in the anti-corrosion agent is 1mol / L, e , f is the mass percentage of the solvent, where 10%e f 2 ―EC is added to the electrolyte as a composite flame retardant. Wherein, the total lithium ion concentration of the mixed lithium salt is 1mol / L, and in the mixed lithium salt, LiFSI mass percentage content is 50%, LiClO 4 The mass percentage is 46%, and the lithium salt LiBOB-AN in the anticorrosion agent 10% -PC 90% Accounting for mixed lithium salt LiFSI—LiClO 4 ―4% of the total mass percentage of LiBOB. In the composite flame retardant, the phosphorus-containing flame retardant triethyl phosphate TEP accounts for 3% of the total mass of the electrolyte, and the fluorine-containing flame retardant CHF 2 ―EC accounts for 3% of the ...

Embodiment 3

[0020] In the same manner as in Example 1, the positive electrode material is iron disulfide, and xLiFSI—yLiClO 4 As a mixed lithium salt (45% e -PC f As an anti-corrosion agent (wherein the concentration of LiBOB in the anti-corrosion agent is 1mol / L, e , f is the mass percentage of the solvent, where 10%e f 3 ―EC is added to the electrolyte as a composite flame retardant. Wherein, the total lithium ion concentration of the mixed lithium salt is 1.1mol / L. In the mixed lithium salt, the LiFSI mass percentage content is 55%, LiClO 4 The mass percentage is 41%, and the lithium salt LiBOB-AN in the anticorrosion agent 10% -PC 90% Accounting for mixed lithium salt LiFSI—LiClO 4 ―4% of the total mass percentage of LiBOB. The phosphorus-containing flame retardant triphenyl phosphate TPP in the composite flame retardant accounts for 3% of the total mass of the electrolyte, and the fluorine-containing flame retardant CF 3 ―EC accounts for 3% of the total mass percentage of t...

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Abstract

The invention belongs to the field of chemical batteries and particularly relates to a lithium battery electrolyte and a lithium primary battery containing the same. The lithium battery electrolyte comprises an organic solvent and an electrolyte. The electrolyte is mixed lithium salt, and the mixed lithium salt is composed of LiFSI and lithium perchlorate. A general formula of the mixed salt is xLiFSI-yLiClO4, wherein 45%<x<70%; 30%<y<55%; and x and y are mass percents. The primary battery obtained through the lithium battery electrolyte is suitable for lithium primary battery systems such as Li / MnO2, Li / FeS2, Li / CuO and Li / (CF)x. The obtained primary battery is low in production cost and excellent in safety performance and low temperature discharge effect.

Description

Technical field [0001] The invention involves a chemical battery field, especially a lithium battery and lithium battery that is obtained. Background technique [0002] The lithium battery has the advantages of higher energy than energy, high energy density, high voltage (opening / put) road voltage, stable discharge voltage, wide range of working temperature, long low temperature performance, and long storage life.Focusing on consumers.However, the safety problems of lithium battery have attracted much attention, mainly because most of the lithium batteries produced in the market currently contain lithium salt (such as lithium hyperchloride), which are impacting, mandatory discharge, over -dischargeUnder such extreme conditions, the lithium salt is easy to react with electrolytes and causes the electrolyte burning, and the internal heating and explosion of the battery.In the production of a lithium battery at a high discharge rate, high -tech lithium salt (such as bivilinum sulfam...

Claims

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Application Information

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IPC IPC(8): H01M6/16
CPCH01M6/166H01M6/168H01M2300/0025
Inventor 何献文潘文硕李少华
Owner HUIZHOU HUIDERUI LITHIUM BATTERY TECHNOLOGY CO LTD
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