Alcaraz Lorena, Díaz-Guerra Carlos, Calbet Joaquín, López María Luisa, López Félix A
Centro Nacional de Investigaciones Metalúrgicas (CENIM), Consejo Superior de Investigaciones Científicas (CSIC), Av. Gregorio del Amo 8, 28040 Madrid, Spain.
Departamento de Física de Materiales, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, Plaza de Ciencias 1, 28040 Madrid, Spain.
Materials (Basel). 2022 Apr 30;15(9):3246. doi: 10.3390/ma15093246.
Spent batteries recycling is an important way to obtain low-cost graphite. Nevertheless, the obtaining of crystalline graphite with a rather low density of defects is required for many applications. In the present work, high-quality graphites have been obtained from different kinds of spent batteries. Black masses from spent alkaline batteries (batteries black masses, BBM), and lithium-ion batteries from smartphones (smartphone black masses, SBM) and electric and/or hybrid vehicles (lithium-ion black masses, LBM) were used as starting materials. A hydrometallurgical process was then used to obtain recycled graphites by acidic leaching. Different leaching conditions were used depending on the type of the initial black mass. The final solids were characterized by a wide set of complementary techniques. The performance as Li ion batteries anode of the sample with better structural quality was assessed.
废旧电池回收是获取低成本石墨的重要途径。然而，许多应用需要获得具有相当低密度缺陷的结晶石墨。在本工作中，已从不同种类的废旧电池中获得了高质量石墨。将废旧碱性电池的黑色物质（电池黑色物质，BBM）、智能手机的锂离子电池（智能手机黑色物质，SBM）以及电动和/或混合动力汽车的锂离子电池（锂离子黑色物质，LBM）用作起始原料。然后采用湿法冶金工艺通过酸浸来获得回收石墨。根据初始黑色物质的类型使用不同的浸出条件。通过一系列广泛的互补技术对最终固体进行了表征。评估了结构质量较好的样品作为锂离子电池阳极的性能。
