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How to handle old lithium batteries

How to handle old lithium batteries

Release date:2018-11-29 author: clicks:

With the gradual expansion of the market for ternary lithium-ion batteries, the environmental hazards of used lithium batteries are also increasing. How to recycle and manage waste lithium batteries has also received widespread attention. However, compared to the variety of lithium battery types, the current treatment options for used lithium batteries are very limited.


"Currently, there are various problems in the various treatment methods of waste lithium batteries, and the way to disassemble the batteries and refine precious metals is still the best way to balance environmental protection and economic benefits." Shenzhen Taili waste lithium battery recycling Zhang Yongxiang, general manager of Technology Co., Ltd. said this.


In a ternary lithium ion battery, materials containing cobalt, nickel, and the like have a high content value. Especially for nickel materials, since the ban on the export of nickel ore in Indonesia on January 12 this year, the price of nickel in the international market has increased by more than 60%. In addition, the current technology for dismantling cobalt and nickel scrap is relatively mature. Therefore, the dismantling of cobalt and nickel scrap has become the main way to dispose of used lithium batteries.


Methods for dismantling cobalt and nickel scrap include "dry method", "wet method" and "dry and wet combination". Zhang Yongxiang said that the "dry method" mainly adopts the burning method and consumes a lot of energy. The state does not advocate it; and the "wet method" metallurgical process will cause water pollution and bring new environmental problems. Therefore, the company mainly adopts the "dry and wet combination" method to disassemble the battery.


However, due to various restrictions, whether it is dismantling lithium carbonate or directly recycling materials such as positive and negative electrodes, it is difficult to get a real commercialization.


Due to the serious shortage of lithium resources in the future, the recovery of lithium manganese oxide lithium ion batteries from used lithium batteries has become a hot spot for some industry insiders. An authoritative organization predicts that by 2050, the global demand for lithium metal will reach 40 million tons, while the current global lithium metal resources are up to 30 million tons, and the proven recoverable lithium resources are only 1500 for lithium metal. Ten thousand tons, there is a huge gap between supply and demand.


In this round of lithium crisis, the situation facing China is particularly harsh. According to statistics, China's ternary lithium-ion battery reserves only account for the world's reserves. More seriously, 70% of the world's lithium resources are in the form of salt lake brines, and China's lithium refining technology is still limited to the extraction of lithium from the ore. The key technology for lithium extraction from brine has not yet been overcome. If the lithium extraction technology of brine is too late to break through, the Chinese lithium battery industry is undoubtedly in a more passive situation.


Although the recovery of lithium carbonate can cope with the shortage of lithium resources to some extent, the high cost of recovering lithium carbonate from used lithium batteries has discouraged battery recycling companies. According to foreign media reports, the cost of recovering lithium carbonate from lithium iron phosphate lithium-ion batteries is five times the current minimum production cost of lithium carbonate. At home and abroad, there is no breakthrough in research in this area.


“Because it’s too cost-effective, almost all battery recycling has abandoned the idea of recycling lithium carbonate in used lithium batteries.” Zhang Yongxiang said, “And recycling lithium manganese oxide lithium batteries may cause harm to employees’ bodies, this project, Maybe even the government's security review can't pass."


The method of recovering higher-value intermediate materials such as positive electrode materials, negative electrode materials, electrolytes, and separators directly from the waste lithium iron phosphate lithium ion battery is faced with the problem that the consistency of the waste lithium battery is difficult to satisfy. It is understood that the intermediate products recovered from the waste lithium battery have high requirements for consistency. The recovered materials must be from the same lithium battery. At least the positive and negative materials and electrolyte used in the lithium battery can be reused on the new battery. .


The reality is that China's lithium battery industry lacks standards, lithium iron phosphate lithium-ion batteries are numerous, lithium battery components are often different, and even the same ternary materials, the proportion of their own components are very different, recycling in the middle The practice of the product still has great difficulty in commercial application.

This article URL:http://www.putchoice.com/en/news/435.html

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