Method for recovering lithium cell materials

Details Method for recovering lithium cell materials Method for recovering lithium cell materials

1994-02-24

1996-02-13

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

Regenerating, salvage or repair feature other than only...

205 59, H01M 1054

Patent

active

054910374

ABSTRACT:
To provide a method for treating nonaqueous solvent type cells, in particular, a method by which lithium cells can be treated and resources can be recovered in safe and in a good efficiency, a method for recovering resources of lithium cells comprises the steps of cutting or boring a lithium cell comprised of at least a negative electrode active material, a separator, a positive electrode active material, an electrolyte solution (electrolytic solution), a collector and a cell casing, in an ignition preventing means; washing the lithium cell thus opened, with an organic solvent to recover the electrolytic solution; reacting lithium with a reacting agent to recover lithium in the form of lithium hydroxide or a lithium salt; carrying out filtration to recover the separator, the collector and a positive electrode material comprising the positive electrode active material; and carrying out distillation to recover the organic solvent. This makes it possible to safely treat lithium cells having been used up, containing organic solvents and metallic lithium, and efficiently recover the resources. This also makes it easy to recycle lithium cells.

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Database WPI, Week 9309, 1993, Derwent Publications Ltd., An 93-071401 & JP-A-5 017 832 (Daito Kagaku KK/Nomura Kosan KK), Jan. 26, 1993.
Extended Abstracts, vol. 81, No. 2, Oct. 1981, pp. 46-47, Marincic et al., "Disposal of Large Li/SOC12 Batteries", p. 46, L 1, p. 47, L 27.
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