Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Positive electrode and electrolyte hybrid recycling method of lithium battery

A recycling method and electrolyte technology, applied in battery recycling, secondary batteries, recycling technology, etc., can solve the problems of personnel operation safety and health hazards, ecological environment impact, etc., to achieve no metal doping, low cost, easy operation simple effect

Active Publication Date: 2018-04-13
江苏智泰新能源科技有限公司
View PDF11 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of the current recycling of lithium-ion battery cathode materials and battery electrolyte, separate treatment is required, and additional acid dissolution and purification need to be added during the treatment process, which will affect the ecological environment and bring hidden dangers to personnel operation safety and health. The invention proposes a mixed recovery method for the positive electrode and electrolyte of lithium batteries, which does not require additional acid addition, reduces environmental pollution, makes personnel operations safer, and facilitates continuous production

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

[0033] (1) In this embodiment, lithium iron phosphate is used as the positive electrode cylindrical lithium-ion battery as a waste lithium-ion battery. After the waste lithium ions are crushed, the positive electrode material of the waste lithium-ion battery is taken out, which contains 86g of iron, 38g of lithium, and 69g of aluminum. Take out the electrolyte under the protection of inert atmosphere argon or nitrogen;

[0034] (2) Add the positive electrode material and the electrolyte into the airtight container and mix them according to the mass ratio of 1:1, add deionized water to the airtight container, and the amount of deionized water is the same as that of the positive electrode material and the electrolyte The mass ratio of the mixture amount is 1:1, and the fluidity of deionized water added to the airtight container is controlled at 480 mL / min to ensure that the hydrolysis process of the electrolyte is evenly completed, and the pretreated mixed raw material is obtaine...

Embodiment 2

[0039](1) In this example, a cylindrical lithium-ion battery using lithium iron phosphate as the positive electrode is used as a waste lithium-ion battery, and lithium iron phosphate is used as the positive electrode. After the waste lithium ions are crushed, the positive electrode material of the waste lithium-ion battery is taken out, which contains 86g of iron , Lithium 38g, copper 72g, in an inert atmosphere of argon or nitrogen protection, take out the electrolyte for later use;

[0040] (2) Add the positive electrode material and the electrolyte into the airtight container and mix them according to the mass ratio of 1:1, add deionized water to the airtight container, and the amount of deionized water is the same as that of the positive electrode material and the electrolyte The mass ratio of the amount of the mixture is 0.6:1, and the fluidity of deionized water added to the airtight container is controlled at 580 mL / min to ensure that the hydrolysis process of the electr...

Embodiment 3

[0045] (1) In this example, a cylindrical lithium-ion battery with NCM532 positive electrode is used as a waste lithium-ion battery. After the waste lithium ions are crushed, the positive electrode material of the waste lithium-ion battery is taken out, which contains 83g of nickel, 78g of cobalt, 76g of manganese, and 38g of lithium. Aluminum 69g, take out the electrolyte under the protection of inert atmosphere argon or nitrogen for standby;

[0046] (2) Add the positive electrode material and the electrolyte into the airtight container and mix them according to the mass ratio of 1:1, add deionized water to the airtight container, and the amount of deionized water is the same as that of the positive electrode material and the electrolyte The mass ratio of the amount of the mixture is 0.5:1, and the fluidity of the deionized water added to the airtight container is controlled at 130mL / min to ensure that the hydrolysis process of the electrolyte is evenly completed, and the pre...

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 discloses a positive electrode and electrolyte hybrid recycling method of a lithium battery. The positive electrode and electrolyte hybrid recycling method comprises the steps of mixingand dissolving a positive electrode material and an electrolyte of the battery in hot water according to a mass ratio being 1:1; performing low-temperature heating and stirring in a closed container to filter lithium fluoride precipitant; injecting a filtering liquid into a next-level saturated sodium carbonate solution to obtain a non-lithium metal carbonate precipitant; and performing smashing,sieving and separation on non-lithium metal after thermal treatment. Hydrofluoric acid is generated by hydrolysis of lithium hexafluorophosphate in the electrolyte to make the positive electrode material dissolved, the defects that the positive electrode material and the electrolyte of the battery are needed to be separately processed during recycling and an extra acid is added during the processing process to perform dissolving to brought a potential risk to an ecological environment and personnel safety are effectively overcome, the positive electrode material and the electrolyte are simultaneously recycled, no extra acid is added, the environmental pollution is reduced, moreover, closed operation during the reaction process is achieved, the safety is high, the process is simple, and continuous production is easy to implement.

Description

technical field [0001] The invention relates to the technical field of recycling waste lithium-ion batteries, in particular to a mixed recycling method for positive electrodes and electrolytes of lithium batteries. Background technique [0002] With the process of economic globalization and the increasing demand for energy, finding new energy storage devices has become a hot spot in the field of new energy. Lithium-ion battery (Li-ion, Lithium Ion Battery): It is a secondary battery (rechargeable battery), which mainly relies on lithium ions to move between the positive and negative electrodes to work. During the charging and discharging process, Li+ intercalates and deintercalates back and forth between the two electrodes: when charging, Li+ is deintercalated from the positive electrode, intercalated into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. Compared with nickel-cadmium...

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
IPC IPC(8): H01M10/54H01M10/0525
CPCH01M10/0525H01M10/54Y02E60/10Y02W30/84
Inventor 陈庆廖健淞
Owner 江苏智泰新能源科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com