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Lithium-manganese primary battery

A primary battery, lithium manganese technology, applied in primary batteries, non-aqueous electrolyte batteries, batteries with organic electrolytes, etc., can solve problems such as affecting the discharge characteristics of batteries, improve discharge characteristics, improve film quality, and improve working environment temperature. Effect

Inactive Publication Date: 2019-02-01
SHENZHEN CAPCHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the existing lithium-manganese primary battery produces gas under high-temperature environment and affects the discharge characteristics of the battery, the present invention provides a lithium-manganese primary battery to improve the discharge characteristics of the lithium-manganese primary battery in a high-temperature environment

Method used

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Examples

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Effect test

Embodiment 1

[0046] This embodiment is used to illustrate the preparation method of a lithium-manganese primary battery disclosed in the present invention, including the following steps:

[0047] 1) Preparation of electrolyte

[0048] Using propylene carbonate mixed with ethylene glycol dimethyl ether as a solvent, adding lithium perchlorate until the molar concentration of lithium ions is 1.0mol / L, based on the total mass of the electrolyte as 100%, adding 1% by mass percentage of maleic acid anhydride, mixed thoroughly to obtain an electrolyte solution.

[0049] 2) Preparation of positive electrode

[0050] Manganese dioxide positive electrode powder, binder polyvinylidene fluoride (PVDF761), conductive additive carbon black and graphite, add organic solvent N, N-dimethylpyrrolidone (NMP) and stir until uniform, the dispersed positive active material The slurry is coated on the current collector, rolled and cut into the positive electrode sheet of the battery. After the positive elect...

Embodiment 2

[0058] This example is used to illustrate the preparation method of a lithium-manganese primary battery disclosed in the present invention.

[0059] Comprise most of the operation steps as in embodiment 1, its difference is:

[0060] 1) Preparation of electrolyte

[0061] Using propylene carbonate mixed with ethylene glycol dimethyl ether as a solvent, adding lithium perchlorate until the molar concentration of lithium ions is 1.0mol / L, based on the total mass of the electrolyte being 100%, adding 0.5% by mass percentage of maleic acid anhydride, mixed thoroughly to obtain an electrolyte solution.

[0062] Label the lithium manganese primary cell as S2.

Embodiment 3

[0064] This example is used to illustrate the preparation method of a lithium-manganese primary battery disclosed in the present invention.

[0065] Comprise most of the operation steps as in embodiment 1, its difference is:

[0066] 1) Preparation of electrolyte

[0067] Using propylene carbonate mixed with ethylene glycol dimethyl ether as a solvent, adding lithium perchlorate until the molar concentration of lithium ions is 1.0mol / L, based on the total mass of the electrolyte being 100%, adding 5% by mass percentage of maleic acid anhydride, mixed thoroughly to obtain an electrolyte solution.

[0068] Label the lithium manganese primary cell as S3.

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Abstract

For solving the problems that a lithium-manganese primary battery in the prior art generates gas and influences the discharge characteristic under a high temperature environment, the invention provides a lithium-manganese primary battery, which includes a cathode, an anode and an electrolyte. The cathode includes MnO2. The electrolyte includes an additive. The additive includes an acid anhydride compound being one or more of: maleic anhydride, methyl maleic anhydride, dimethyl maleic anhydride, succinic anhydride, glutaric anhydride, methyl succinic anhydride, dimethyl succinic anhydride, acetic anhydride, propionic anhydride and butyric anhydride. By means of the specific acid anhydride compound, the high-temperature storage performance of the lithium-manganese primary battery is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of lithium primary batteries, and in particular relates to a lithium manganese primary battery. Background technique [0002] With the rapid development of electronic information technology and emerging intelligent electronic products, the requirements for the performance of lithium-manganese primary batteries are also increasing, especially their high-temperature storage performance, which has become the first choice for lithium-manganese primary batteries in high-temperature environments. bottleneck. At present, the electrolyte solvents of commercial lithium-manganese primary batteries are mostly cyclic carbonates and organic ethers. When the batteries are stored in a high-temperature environment (above 70°C) for a long time, in addition to part of the solvent volatilization into gas, there are also most of the reaction generated. Carbon dioxide increases the internal resistance of the battery and rapidly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/16
CPCH01M6/168
Inventor 谭光平陈燃
Owner SHENZHEN CAPCHEM TECH CO LTD
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