Process for recycling valuable elements from positive electrode material of lithium ion battery

Abstract

The invention relates to the technical field of electronic waste recycling treatment and resource utilization, in particular to a process for recycling valuable elements from the positive electrode material of the lithium ion battery. According to the process, through the crushing, reacting, separating and recycling of a positive electrode plate of the lithium ion battery and the adding of alkalisalt in the reaction process, the temperature required by the reaction is effectively reduced and the efficient recycling of the valuable elements in the positive electrode material of the lithium ionbattery is achieved. According to the process disclosed by the invention, the reduction of transition metal elements and conversion of lithium are synchronously completed under the condition of not additionally adding a reducing agent, and the efficient recycling of valuable elements is realized; and moreover, the separation process of a positive electrode active substance and a current collectoris avoided, and the recycling process of valuable elements is greatly simplified. On the basis of simple and reasonable flow, the process is economic and environment-friendly, the raw material applicability is wide, and the method has remarkable economic and environment-friendly benefits.

Description

technical field [0001] The invention relates to the technical field of recycling and recycling of electronic waste, and in particular to a process for recovering valuable elements from positive electrode materials of lithium-ion batteries. Background technique [0002] Since the 1990s, lithium-ion batteries have been widely used in various portable electronic products, such as digital cameras, notebook computers, etc. In recent years, as people's demand for environmental protection has increased year by year, my country has begun to promote a large number of new energy vehicles, and lithium-ion batteries, as the power source of new energy vehicles, have seen explosive growth in their applications. But whether it is a small lithium-ion battery in portable electronic products or a power battery in a new energy vehicle, its life is limited. Commercial lithium-ion batteries typically have less than 1,000 cycles. Therefore, the large-scale application of lithium-ion batteries a...

AI Technical Summary

Problems solved by technology

In addition, during the carbothermal reduction process, Li mainly forms as slightly soluble Li 2 CO 3 form, if you want to extract it separately, you need to use pressurized CO 2 Gas can only be achieved, complicating the extraction process

[0007] All in all, the current recycling of valuable elements in the positive electrode materials of waste lithium-ion batteries has a complex separation process between the positive electrode active material and the current collector, the low recovery rate of the valuable element lithium and the complicated recovery process, and the leaching process requires a large amount of reducing agent or carbon. The thermal reduction process has problems such as high temperature, high energy consumption, and toxic and harmful gas emissions, which restrict the economical and clean recovery of valuable elements in positive electrode materials.