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Modified processing method of electrolytic manganese bioxide for lithium battery

A technology of electrolytic manganese dioxide and treatment methods, applied in battery electrodes, manganese oxide/manganese hydroxide, circuits, etc., can solve the problem of increased impedance, increased resistance of tunnel structures, insufficient discharge performance of batteries under large loads and discharge capacity, etc. question

Inactive Publication Date: 2007-03-21
广州微宏电源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Manganese dioxide will be affected by oxygen and nitrogen in the air during the high-temperature calcination transformation process, and the crystal form of manganese dioxide after high-temperature treatment will partially collapse, thereby increasing the Li + The resistance penetrated into its tunnel structure, Li + Decreased diffusion capacity and increased impedance lead to insufficient large-load discharge performance and discharge capacity performance of lithium-manganese dioxide electrochemical system batteries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] 1. Electrolytic manganese dioxide heat treatment temperature and time:

[0012] One group used a 500°C blast drying oven to treat electrolytic manganese dioxide at 370-380°C for 24 hours, and more than 95% of argon gas was introduced to protect and form convection during the heating, heat preservation and cooling processes.

[0013] Another group heat-treated electrolytic manganese dioxide according to the prior art.

[0014] 2. Battery cathode formula

[0015] Manganese dioxide: colloidal graphite: acetylene carbon black: tetrafluoro: alcohol = 46.5kg: 1.8kg: 1.7kg: 3.5L: 2L, mix well.

[0016] 3. Electrolyte formula

[0017] 1mol / l LiClO 4 A mixed solution of PC (propylene carbonate), DME (ethylene glycol dimethyl ether) and DIOX (dioxolane) (volume ratio of PC50%, DME20%, DIOX30%), electrohydraulic water content: <0.2mg / ml, the amount of electrolyte in each battery is 3.0g.

[0018] 4. Manganese dioxide cathode sheet technology

[0019] The length is 210±0.5mm...

Embodiment 2

[0026] 1. Electrolytic manganese dioxide heat treatment temperature and time:

[0027] The electrolytic manganese dioxide is processed in a blast drying oven at 500°C at 370-380°C for 10 hours, and more than 95% of helium gas is introduced to protect and form convection during the heating, heat preservation and cooling processes.

[0028] 2. The remaining steps and the assembly method of the experimental battery are the same as in Example 1, and the experimental results are shown in Table 2.

[0029] serial number

Embodiment 3

[0031] 1. Electrolytic manganese dioxide heat treatment temperature and time:

[0032] The electrolytic manganese dioxide was processed in a 500°C blast drying oven at 370-380°C for 20 hours, and more than 95% of xenon gas was introduced to protect and form convection during the heating, heat preservation and cooling processes.

[0033] 2. The remaining steps and the assembly method of the experimental battery are the same as in Example 1, and the experimental results are shown in Table 3.

[0034] serial number

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Abstract

This invention discloses a modified process method for electrolyte MnO2 used in Li batteries, which processes electrolyte MnO2 powder under the temperature of 370-380deg.C for 10-24 hours and inlets inert gas for protection in process.

Description

technical field [0001] The invention relates to manganese dioxide modification technology, in particular to a modification treatment method of electrolytic manganese dioxide for lithium batteries. Background technique [0002] The lithium-manganese dioxide electrochemical system battery with active metal lithium as the anode, manganese dioxide as the cathode, and organic solvent as the electrolyte is widely used in Computers, automation instruments, cameras, etc. [0003] The electrical performance of the lithium-manganese dioxide electrochemical system battery mainly depends on the cathode active material manganese dioxide, especially the large-load discharge performance and discharge capacity of the battery. In order to improve the electrical properties of electrolytic manganese dioxide, the current modification method of electrolytic manganese dioxide for lithium-manganese dioxide electrochemical system batteries is to directly expose electrolytic manganese dioxide powde...

Claims

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Application Information

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IPC IPC(8): H01M4/50H01M4/04C01G45/02
CPCY02E60/12Y02E60/10
Inventor 王圣平郭志东郭志勤
Owner 广州微宏电源科技有限公司
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