Abstract
In recent years, research on waste lithium battery electrode materials has been continuously deepened, leading to the development of various efficient, low-cost, and environmentally friendly methods for recycling lithium battery materials. The molten salt method has also emerged as a new green method. This article provides an overview of the definition and advantages of molten salt, briefly introduces its application in materials and the preparation of lithium battery electrodes. Based on the deactivation mechanism of lithium battery materials, the recycling process can be categorized into four main aspects: i. Separation of positive electrode materials and aluminum foil during pre-treatment; ii. Molten salt-assisted calcination for recycling positive electrode materials; iii. Molten salt electrolysis for recycling lithium battery materials; iv. Eutectic molten salt for direct recycling and regeneration of positive electrode materials. All these methods have demonstrated high efficiency in recycling. Finally, the article introduces the waste gas and waste generated during the molten salt recycling process, as well as methods for their recycling and reuse. This paper aims to establish a molten salt recycling system, provide a clearer understanding of the molten salt recycling method, and promote the attention and application of the molten salt method in the lithium battery industry.
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