| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for recovering valuable metals from a lithium-ion battery by a relatively simple facility without using a complicated process. <P>SOLUTION: A positive electrode material of the lithium-ion battery including lithium and transition metal elements is dissolved in an acidic solution to generate lithium ions and transition metal ions in the acidic solution, the acidic solution and a recovering solution are passed through an anion-permeable membrane to dialyze lithium ions from the acidic solution to the recovering solution, and lithium ions are recovered from the recovering solution in which the lithium ions are dissolved by the dialysis. In this case, an additive which makes the inside of the dialysis membrane hydrophilic is added, whereby the permeability rate of lithium ions to the permeable membrane is improved, and lithium selective passing rate and recovery rate are improved. <P>COPYRIGHT: (C)2013,JPO&INPIT |
