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

Method for selectively recovering lithium from waste lithium ion battery by utilizing ultralow-temperature roasting

A lithium-ion battery, ultra-low temperature technology, applied in battery recycling, waste collector recycling, secondary batteries, etc., can solve the problems of high consumption of acid, alkali and reducing agent, difficult treatment of waste water and waste liquid, high energy consumption cost, etc. Achieve the effect of low equipment anti-corrosion requirements, low energy consumption cost and low regeneration cost

Active Publication Date: 2021-09-21
NANCHANG HANGKONG UNIVERSITY
View PDF15 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that the roasting temperature of valuable metals in the existing high-temperature metallurgy recovery process of waste lithium-ion batteries is as high as 800°C to 1000°C, the cost of energy consumption is high, and the recovery efficiency is low; while hydrometallurgy has acid-base and reducing agents Due to the technical problems of large energy consumption, serious metal loss during the separation process, difficult subsequent wastewater treatment, and large environmental load, a method for selectively recovering lithium from waste lithium-ion batteries by ultra-low temperature roasting is provided.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for selectively recovering lithium from waste lithium ion battery by utilizing ultralow-temperature roasting
  • Method for selectively recovering lithium from waste lithium ion battery by utilizing ultralow-temperature roasting

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0023] Specific Embodiment 1: This embodiment is a method for selectively recovering lithium from waste lithium-ion batteries by ultra-low temperature roasting, specifically according to the following steps:

[0024] 1. Use a mechanical crusher to crush the positive electrode sheet of the waste lithium-ion battery to obtain the positive electrode powder of the lithium-ion battery; put the positive electrode powder of the lithium-ion battery into Al 2 o 3 Put it in a crucible, then place it in a tube furnace, raise the temperature from room temperature to 500°C to 650°C at a rate of 1°C / min to 10°C / min and keep it warm for 0.5h to 6h to remove the conductive agent and binder, and then cool naturally to room temperature; pass through a 200-400-mesh sieve to obtain waste lithium-containing cathode materials with a particle size of 0.035mm-0.075mm;

[0025] 2. Put the waste lithium-containing positive electrode material obtained in step 1 into an agate mortar together with the co...

specific Embodiment approach 2

[0033] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the quality of lithium-ion battery positive electrode powder and Al 2 o 3 The volume ratio of the crucible is 1g:(10mL~15mL). Others are the same as the first embodiment.

specific Embodiment approach 3

[0034] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that: the method for obtaining the positive electrode sheet of the waste lithium-ion battery described in step one is: soak the collected waste lithium-ion battery at room temperature Discharging treatment is carried out in an aqueous sodium chloride solution with a mass fraction of 5% to 10% for 12h to 72h, and then the waste lithium ion battery is disassembled to obtain a positive electrode sheet. Others are the same as those in Embodiment 1 or 2.

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
concentrationaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for selectively recovering lithium from waste lithium ion batteries, in particular to a method for selectively recovering lithium from waste lithium ion batteries through ultralow-temperature roasting. The invention aims to solve the problems of high roasting temperature, high energy consumption cost and low recovery efficiency in the existing high-temperature metallurgical recovery process of valuable metals in waste lithium ion batteries, and the technical problems of high consumption of acid, alkali and reducing agents, serious metal loss in the separation process, difficulty in subsequent wastewater and waste liquid treatment and high environmental load in hydrometallurgy. According to the invention, a composite salt is added to selectively destroy the interlayer structure of lithium and oxygen from the positive plate of the lithium ion battery and form the soluble lithium salt, so that selective extraction of lithium ions is realized. The method can be carried out at the ultralow temperature of 300 DEG C, the selectivity to target metal is achieved, the lithium ion recovery rate reaches 90%, and the purity of recovered lithium carbonate reaches up to 95%; and no acid or alkali is added in the whole process, the energy consumption cost is low, and no secondary pollution is generated in the recovery process.

Description

technical field [0001] The invention relates to a method for selectively recovering lithium from waste lithium ion batteries. Background technique [0002] Lithium-ion batteries (LIB) have the advantages of good charge and discharge performance, high working voltage, high energy density, light product quality, long cycle life and good safety. Since their commercialization in 1990, they have gradually replaced traditional nickel-metal hydride batteries, Secondary batteries such as nickel-cadmium batteries and lead-acid batteries are widely used in new energy vehicles, portable electronics and communication products, and stationary energy storage equipment for renewable energy such as solar energy. It is estimated that the global battery market demand will reach 99.98 billion US dollars in 2025, and the shipment volume will be 43.932 billion kWh. This huge energy demand will lead to the consumption of a lot of resources. Since the service life of lithium-ion batteries is gene...

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): C01D15/08H01M10/0525H01M10/54
CPCC01D15/08H01M10/54H01M10/0525C01P2006/80C01P2002/85Y02W30/84Y02P20/133Y02E60/10
Inventor 邵鹏辉黄涌罗旭彪郑宇帆杨利明胡文斌
Owner NANCHANG HANGKONG UNIVERSITY
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