The invention provides a method for selectively recycling positive
electrode materials for
lithium ion batteries. The method comprises the following steps: carrying out transformation
processing aftermixing the recycling positive
electrode materials for
lithium ion batteries with an additive; leaching an obtained transformation product with a leaching agent, and carrying out
solid-liquid separation to obtain a
lithium-rich solution and a
solid slag; and preparing the obtained lithium-rich solution into a lithium salt and the obtained
solid slag into a
transition metal salt. According to the method, recycling of valuable metals in the positive
electrode materials for lithium
ion batteries is realized by using in situ
crystal transformation and mild leaching methods, particularly, selectiveextraction for lithium is realized, the recycle rate reaches 95% or above, and the recycle rate of other valuable metals such as
nickel,
cobalt and
manganese reaches 98% or above; the method is shortin flow, other
impurity ions are not introduced, the product purity is high, secondary
pollution and
liquid waste disposal can also be avoided, the recycle cost is saved, and the method is easy to realize industrial application.