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Modified method for electrolytic manganese dioxide for lithium battery

A technology for electrolysis of manganese dioxide and lithium batteries, applied in battery electrodes, manganese oxide/hydroxide, circuits, etc., can solve problems such as the reduction of the actual molar ratio, and achieve the effect of improving electrochemical activity

Inactive Publication Date: 2005-04-06
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the modification method of electrolytic manganese dioxide for lithium batteries is that the manganese dioxide powder is exposed to the air and calcined at high temperature. With the prolongation of the calcination time, the concentration of oxygen in the high-temperature space decreases, and the manganese dioxide removes the crystal water at the same time. Part of the oxygen is also removed, resulting in a decrease in the actual molar ratio of Mn to O, reducing the MnO 2 Electrochemical activity of batteries in lithium manganese dioxide electrochemical system

Method used

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  • Modified method for electrolytic manganese dioxide for lithium battery

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Embodiment 1

[0028] Modification method of electrolytic manganese dioxide for lithium battery, γ-MnO after electrolysis 2 The powder is treated in a blast drying oven at 500°C at 375°C for 24 hours, and 95% oxygen is continuously supplied to the blast drying oven to make the oxygen convect in the high temperature space. Modified MnO 2 From the γ crystal form to the γ and β mixed crystal form (the β crystal form accounts for 40%-60%).

[0029] The above-mentioned modified electrolytic manganese dioxide was assembled according to the production process requirements of CR123A battery to assemble the CR123A experimental battery, and at the same time, the normal modified electrolytic manganese dioxide was used as a blank comparison. See the battery discharge results of the first, second and third experiments.

[0030] Experimental battery of oxygen-enriched modified electrolytic manganese dioxide of the present invention

[0031] Experimental battery of oxygen-enriched mo...

Embodiment 2

[0034] Modification method of electrolytic manganese dioxide for lithium battery, γ-MnO after electrolysis 2 The powder is treated in a blast drying oven at 500°C at 370°C for 24 hours, and 98% oxygen is continuously supplied to the blast drying oven to make the oxygen convect in the high temperature space.

Embodiment 3

[0036] Modification method of electrolytic manganese dioxide for lithium battery, γ-MnO after electrolysis 2 The powder is treated in a blast drying oven at 500°C at 380°C for 24 hours, and 100% oxygen is continuously supplied to the blast drying oven to make the oxygen convect in the high temperature space.

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Abstract

This invention relates to a manganese bioxide electrolysis modification method of lithium battery, which is characterized by the following: the electrolyzed gamma-MnO#-[2] powder is protected in the oxygen of 95 to 100 percent and is calcined with high temperature of 370 to 380 degrees; it forms the convection of oxygen in high temperature space for 24 hours.

Description

technical field [0001] The invention relates to a method for modifying electrolytic manganese dioxide used in lithium batteries. Background technique [0002] Lithium manganese dioxide electrochemical system battery with active metal lithium as anode, manganese dioxide as cathode and organic solvent as electrolyte is widely used in computer because of its high specific energy, high working voltage and long service life. , automation instruments, cameras and other equipment. [0003] The electrical performance of the lithium manganese dioxide electrochemical system battery mainly depends on the cathode material manganese dioxide, especially the large load discharge performance and discharge capacity of the battery. In the existing technology, manganese dioxide directly electrolyzed is put into production after being modified by high-temperature calcination in the air. [0004] At present, the modification method of electrolytic manganese dioxide for lithium batteries is tha...

Claims

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Application Information

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IPC IPC(8): C01G45/02H01M4/505
CPCY02E60/122H01M4/04H01M4/505Y02E60/10
Inventor 王圣平代江华杨问华
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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