Electrochemical activity restoration method of failure lithium manganese phosphate

A technology of lithium manganese phosphate and repair method, which is applied to circuits, electrical components, battery electrodes, etc., to shorten the ball milling time, improve the cleaning efficiency, and improve the ball milling uniformity.

Inactive Publication Date: 2018-10-23
安徽南都华铂新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a simple and efficient electrochemical active repair method for failed lithium manganese phosphate that can effectively avoid the environmental pollution caused by the direct disposal of failed lithium manganese phosphate and the existing waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add lithium element, manganese element and carbon source to the invalid lithium manganese phosphate, so that the atomic ratio of lithium, manganese and phosphorus in the system reaches 1.05:0.98:1, mix evenly by wet ball milling, and finally calcinate in reducing atmosphere, the calcining temperature is at At 700°C, the electrochemical active repair of failed lithium manganese phosphate can be realized.

[0025] Wherein, the carbon source is sucrose, and the added amount of the carbon source is 8%; the lithium source is lithium carbonate, and the manganese source is manganese oxalate.

Embodiment 2

[0027] Add lithium element, manganese element and carbon source to the invalid lithium manganese phosphate, so that the atomic ratio of lithium, manganese and phosphorus in the system reaches 1.1:1:1, mix evenly by wet ball milling, and finally calcinate in a reducing atmosphere at a temperature of At 750°C, the electrochemical active repair of failed lithium manganese phosphate can be realized.

[0028] Wherein, the carbon source is glucose, and the added amount of the carbon source is 8%; the lithium source is lithium carbonate, and the manganese source is manganese oxalate.

Embodiment 3

[0030] Add lithium element, manganese element and carbon source to the invalid lithium manganese phosphate, so that the atomic ratio of lithium, manganese and phosphorus in the system reaches 1.05:0.98:1, mix evenly by wet ball milling, and finally calcinate in reducing atmosphere, the calcining temperature is at At 750°C, the electrochemical active repair of failed lithium manganese phosphate can be realized.

[0031] Wherein, the carbon source is glucose, and the added amount of the carbon source is 8%; the lithium source is lithium carbonate, and the manganese source is manganese oxalate.

[0032] The steel balls of the ball mill for wet ball milling are washed with water after the ball mill is finished, and the water washing operation is carried out under the uniform rotation of the ball mill.

[0033] When washing with water, add a builder to clean water, and the mass ratio of clean water to builder is 100:3.

[0034] Preparation of builder: Add water to 10g of water tre...

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PUM

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Abstract

The invention discloses an electrochemical activity restoration method of failure lithium manganese phosphate, and relates to the technical field of battery material green restoration. Lithium elements, manganese elements and carbon sources are added into the failure lithium manganese phosphate; the uniform mixing is performed through wet process ball milling; finally, roasting is performed in reduced atmosphere; the electrochemical activity restoration can be realized. The corresponding ingredients are added into the failure lithium manganese phosphate, so that the green restoration of the lithium manganese phosphate battery material can be directly realized; simplicity and effectiveness are realized; the electrochemical activity restoration method belongs to a low-cost battery material recovery and utilization method; the environment pollution caused by direct abandoning of the failure lithium manganese phosphate and the resource waste problem can be avoided.

Description

Technical field: [0001] The invention relates to the technical field of green repair of battery materials, in particular to an electrochemically active repair method for failed lithium manganese phosphate. Background technique: [0002] Like lithium iron phosphate batteries, lithium manganese phosphate also belongs to the positive electrode material of phosphate-based lithium battery with olivine structure. The safety and cycle life of this material are higher than those of traditional layered structure positive electrode materials such as lithium cobalt oxide and ternary materials. . However, the widely used lithium iron phosphate potential of 3.4V limits the improvement of battery energy density, while lithium manganese phosphate has a high potential of 4.1V. Therefore, under the same capacity, the energy density of lithium manganese phosphate battery can be increased by about 20% compared with lithium iron phosphate battery. [0003] With the wide application of lithium...

Claims

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Application Information

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IPC IPC(8): H01M10/54H01M4/58
CPCH01M4/5825H01M10/54Y02E60/10Y02W30/84
Inventor 朱建楠吴国庆
Owner 安徽南都华铂新材料科技有限公司
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