Electrochemical activity repair method for failed lithium ferromanganese phosphate

A technology of lithium iron manganese phosphate and repair method, applied in electrochemical generators, secondary battery repair/maintenance, circuits, etc., can solve the problems of low cost, weak cycle stability, low electrical conductivity, etc., and improve the uniformity of ball milling. The effect of improving the cleaning efficiency, shortening the ball milling time and improving the cleaning efficiency

Inactive Publication Date: 2018-09-21
安徽南都华铂新材料科技有限公司 +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] LiFePO 4 It is considered to be one of the positive electrode materials for lithium-ion batteries with development prospects due to its low price, abundant output, and good cycle stability. However, due to the use of only 3.2V, insufficient rate performance, and low conductivity, it cannot meet high-energy power requirements. Battery requirements limit its further development
LiMnPO 4 Compared to LiFePO 4 The cycle stability is relatively weak, but it has the characteristics of high voltage (3.8V), low self-discharge rate, mature materials, and low cost.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add lithium carbonate, manganese oxalate, iron oxalate, and sucrose (7% added amount) to the spent lithium manganese iron phosphate, use wet ball milling to mix evenly, and finally calcinate under an inert atmosphere (nitrogen) at a calcining temperature of 700°C, then Achieving electrochemically active repair.

[0026] The expired lithium manganese iron phosphate is the positive electrode material separated from the lithium manganese iron phosphate battery.

[0027] Among them, the molar weight of iron in the failed lithium manganese iron phosphate accounts for 12% of the total molar weight of iron and manganese. After adding lithium, manganese and iron elements, the failed lithium manganese iron phosphate makes the atoms of lithium, manganese+iron and phosphorus in the system The ratio is 1.1:1:1, while ensuring that the molar amounts of added manganese and iron are equal.

Embodiment 2

[0029] Add lithium carbonate, manganese oxalate, iron oxalate, and glucose (8%) to the spent lithium manganese iron phosphate, use wet ball milling to mix evenly, and finally calcinate under an inert atmosphere (helium) at a calcination temperature of 750°C, that is Electrochemical active repair can be achieved.

[0030] The expired lithium manganese iron phosphate is an expired lithium manganese iron phosphate material.

[0031] Among them, the molar weight of iron in the failed lithium manganese iron phosphate accounts for 10% of the total molar weight of iron and manganese. After adding lithium, manganese and iron elements, the failed lithium manganese iron phosphate makes the atoms of lithium, manganese+iron and phosphorus in the system The ratio is 1.05:0.98:1, while ensuring that the molar amounts of added manganese and iron are equal.

Embodiment 3

[0033] Add lithium carbonate, manganese oxalate, iron oxalate, and glucose (8%) to the spent lithium manganese iron phosphate, use wet ball milling to mix evenly, and finally calcinate under an inert atmosphere (helium) at a calcination temperature of 750°C, that is Electrochemical active repair can be achieved.

[0034] The expired lithium manganese iron phosphate is an expired lithium manganese iron phosphate material.

[0035] Among them, the molar weight of iron in the failed lithium manganese iron phosphate accounts for 10% of the total molar weight of iron and manganese. After adding lithium, manganese and iron elements, the failed lithium manganese iron phosphate makes the atoms of lithium, manganese+iron and phosphorus in the system The ratio is 1.05:0.98:1, while ensuring that the molar amounts of added manganese and iron are equal.

[0036] The steel balls of the ball mill for wet ball milling are washed with water after the ball mill is finished, and the water wash...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to the technical field of waste lithium ion battery recycling and discloses an electrochemical activity repair method for failed lithium ferromanganese phosphate. A lithium element, a manganese element, an iron element and a carbon source are added into the failed lithium ferromanganese phosphate and well mixed to realize electrochemical activity repair through calcining in an inert atmosphere. By adding of corresponding components, green repair of lithium ferromanganese phosphate battery materials is directly realized, and simplicity and high efficiency are achieved. Themethod is a low-cost battery material recycling method, and problems of high cost and environmental pollution caused by hydrometallurgy are avoided while quick repair of the waste lithium ferromanganese phosphate battery materials is realized.

Description

Technical field: [0001] The invention relates to the technical field of recycling waste lithium ion batteries, in particular to an electrochemically active repair method for invalid lithium manganese iron phosphate. Background technique: [0002] LiFePO 4 It is considered to be one of the positive electrode materials for lithium-ion batteries with development prospects due to its low price, abundant output, and good cycle stability. However, due to the use of only 3.2V, insufficient rate performance, and low conductivity, it cannot meet high-energy power requirements. Battery requirements limit its further development. LiMnPO 4 Compared to LiFePO 4 The cycle stability is relatively weak, but it has the characteristics of high voltage (3.8V), low self-discharge rate, mature materials, and low cost. According to the required characteristics of the power battery, Fe and Mn are combined, and Mn-doped LiFePO is used 4 As a lithium ion battery cathode material - lithium manga...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54H01M10/42
CPCH01M10/4235H01M10/54Y02E60/10Y02W30/84
Inventor 朱建楠吴国庆
Owner 安徽南都华铂新材料科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap