Research progress on metal recycling of waste lithium batteries

The research progress of metal recycling of used lithium batteries, power and the environment are two major issues that mankind will face in the 21st century. In recent years, lithium batteries have been widely used due to their light weight, small size, small self-discharge, no recall effect, wide operating temperature range, fast charge and discharge, long service life, and environmental protection. Whittingham first manufactured the first lithium battery using the li-tis system and commercialized it in 1990. It has been more than 40 years since then, and tremendous progress has been made. According to statistics, from January to October 2017, my country processed 8.99 billion lithium batteries, a cumulative increase of 34.6%. Internationally, the application of lithium batteries in the field of aerospace power has entered the engineering application stage. Some companies and military departments around the world have conducted research and development on the application of lithium batteries in the aerospace field, such as the National Aeronautics and Space Administration, the American Eagle Picher Battery Company, the French SAFT Company, and the Japanese JAXA Company. With the widespread use of lithium batteries, the number of used batteries is constantly increasing. It is estimated that by 2020, the cumulative scrap volume of power lithium-ion batteries for pure electric (including plug-in) passenger cars and hybrid passenger cars in my country will be between 120,000 and 170,000 tons. Although lithium batteries are called green batteries and do not contain harmful elements such as mercury and lead, their positive electrode data and electrolyte solution will cause great pollution to the environment and waste resources. Therefore, it is of great practical significance to summarize the current situation of waste lithium battery recycling technology at home and abroad, and to summarize the development direction of waste lithium battery recycling technology on this basis. Important components of lithium batteries The important components of lithium batteries are casing, electrolyte, positive electrode data, negative electrode data, adhesive, copper foil and aluminum foil. During this period, the mass fractions of Co, Li, and Ni were 5% to 15%, 2% to 7%, 0.5% to 2%, and metal elements such as Al, Cu, and Fe. In terms of the main component value, the positive and negative data accounted for about 33% and 10%, respectively, and the electrolyte and separator separation accounted for about 12% and 30%. The first metals recovered from waste lithium batteries are Co and Li, which are mainly assembled on the cobalt-lithium film on the anode data. Especially due to the relative shortage of cobalt resources in my country, the development and application of cobalt are difficult. However, the mass fraction of cobalt in lithium batteries accounts for about 15%, which is 850 times more related to cobalt ore. At present, the positive data of LiCoO2 lithium battery is widely used, containing lithium cobalt oxide, lithium method, organic carbonate carbon data, copper, aluminum and other chemical substance statement: Some pictures and content of articles published on this site are from the Internet, such as If there is any infringement, please contact to delete the previous article: Lithium battery electric vehicles replace lead-acid batteries, the market will expand