| 摘要 |
Lithium primary and secondary cells are soaked in aqueous solutions made sufficiently conducting to create a short circuit between their oppositely charged electrodes, and for a time sufficient to complete electrochemical oxidation of lithium-metal that they still contain. Inactivation of lithium, particularly MnO2-Li, primary and/or secondary cells, before disintegration, crushing, incineration, etc., in order to prepare them for disposal or to recover valuable materials that they still contain, involves soaking them in aqueous solutions that are sufficiently conducting to create a short circuit between oppositely charged electrodes, and for a time necessary to complete electrochemical oxidation of contained lithium. The constituents contributing to the conductive character of the solution are selected in sufficiently low concentrations in order to reduce to a minimum, if not completely avoid, at least during soaking, the risk of corrosion or disintegration of the casings of the cells. The soaking solution can be a 0.001-0.02N solution of hydrochloric acid or sulfuric acid, a 0.01-0.1N solution of sodium hydroxide, or a 0.1-1M solution of sodium chloride. |
