Dissolution and characterization of HEV NiMH batteries
Artikel i vetenskaplig tidskrift, 2013

Metal recovery is an essential part of the recycling of hybrid electric vehicle battery waste and the first step in a hydrometallurgical treatment is dissolution of the solid material. The properties of separated battery electrode materials were investigated. Focus was put on both the solid waste and then the dissolution behaviour. The cathode contains metallic nickel that remains undissolved when utilizing non-oxidizing conditions such as hydrochloric or sulphuric acid in combination with a low oxygen atmosphere. In these conditions the cathode active electrode material is fully dissolved. Not dissolving the nickel metal saves up to 37% of the acid consumption for the cathode electrode material. In the commonly used case of oxidizing conditions the nickel metal dissolves and a cobalt-rich phase remains undissolved from the cathode active material. For the anode material a complete and rapid dissolution can be achieved at mild conditions with hydrochloric, nitric or sulphuric acid. Optimal parameters for all cases of dissolution was pH 1 with a reaction time of approximately >= 20,000 s.

nickel-hydroxide

recovery

values

rare-earth

rechargeable batteries

Batteries

Characterization

Dissolution

metal-hydride batteries

batteries

extraction

cobalt

separation

NiMH

HEV

mh

Författare

Kristian Larsson

Chalmers, Kemi- och bioteknik, Industriell materialåtervinning

Christian Ekberg

Chalmers, Kemi- och bioteknik, Industriell materialåtervinning

Arvid Ödegård Jensen

Chalmers, Kemi- och bioteknik, Industriell materialåtervinning

Waste Management

0956-053X (ISSN)

Vol. 33 3 689-698

Ämneskategorier

Kemi

DOI

10.1016/j.wasman.2012.06.001

PubMed

22796014

Mer information

Skapat

2017-10-08