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Method for disassembling metal lithium negative electrode from lithium battery

A metal lithium and lithium battery technology, which is applied in the field of energy batteries to reduce the difficulty of dismantling

Pending Publication Date: 2021-12-03
CHINA ENERGY LITHIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is currently no safe disassembly process for lithium metal anodes

Method used

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  • Method for disassembling metal lithium negative electrode from lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Perform voltage detection on 5Ah soft pack single metal lithium battery.

[0028] After the detection is completed, metal lithium batteries with a voltage lower than 2.7V do not need to be discharged. The battery with a voltage higher than 2.7V is discharged at a constant voltage, the voltage is set to 2.7V, and the discharge cut-off current is 0.25A.

[0029] Needle-puncture the pretreated metal lithium battery. Use a steel needle with a diameter of 2mm to puncture the positive and negative tabs of the battery to pierce the single-layer aluminum-plastic film.

[0030] Use a syringe to inject the tetrahydrofuran solution dissolved in phosphoric acid crystals into the interior of the battery. Inject into the negative ear, and stop the injection when a small amount of liquid overflows from the overflow port of the positive ear.

[0031] The single battery filled with the passivation solution was left to stand for 4 hours at a temperature of 45°C.

[0032] After standing...

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Abstract

The invention discloses a method for safely disassembling a metal lithium negative electrode from a lithium battery. The method comprises the following steps: step 1, preprocessing an obtained single battery; step 2, punching positive and negative tabs; step 3, injecting a passivation solution into a negative electrode hole; step 4, conducting standing; and step 5, breaking the shell or the outer package of the single battery to take out the metal lithium negative electrode. The disassembly steps are safe and can be carried out in the atmosphere, a protective atmosphere is not needed, and the disassembly difficulty is reduced.

Description

technical field [0001] The invention belongs to the technical field of energy batteries, and relates to a lithium battery processing method, in particular to a method for safely dismantling a lithium metal negative electrode from a lithium battery. Background technique [0002] As an electrochemical energy storage device, batteries have been widely used in communications, new energy vehicles, daily consumer goods and other fields. In the research field of electrode materials, metal lithium anode has always been a research hotspot because of its high theoretical capacity (3860mAh / g) and the lowest electrochemical potential (-3.04V versus standard hydrogen electrode). Especially with the performance of lithium batteries tending to the "ceiling" and people's desire for high energy density of batteries, people have turned their attention to advanced battery systems including all-solid-state batteries, lithium-sulfur batteries, lithium-oxygen batteries, and these advanced battery...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54H01M10/052
CPCH01M10/54H01M10/052Y02E60/10Y02W30/84
Inventor 孔德钰郇庆娜陈强牟瀚波李振宇张月
Owner CHINA ENERGY LITHIUM
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