Johnson Matthey Technology Review - Current Issue
Volume 69, Issue 2, 2025
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Review of Recovery and Purification Processes of Rare Earth Elements from Nickel-Metal Hydride Spent Batteries
Authors: M Widya Aryani, Azwar Manaf, Erik Prasetyo, Diah Susanti, Anton Sapto Handoko, Fajar Nurjaman, Ulin Herlina, Rikson Siburian and Fathan BahfieThe concept of a circular economy for rare earth elements (REEs) is being developed. The circular economy involves optimising the lifecycle of products to achieve sustainable and efficient consumption. REEs are considered critical elements of high economic value. Considering limited rare earth reserves, secondary source REEs are very important to sustainable use. Spent nickel-metal hydride (Ni-MH) batteries are electronic waste containing valuable REEs. Ni-MH batteries that have reached their age limit, if thrown away, will become hazardous waste. Recycling Ni-MH battery waste efficiently enables REEs to be recovered and reused. The REE recovery process has challenges that must be considered such as efficiency, low REE concentration, environmental concerns and scalability, thus requiring the development of new, efficient recovery methods and processes for REE. Currently the hydrometallurgical method is preferred for REE recovery from Ni-MH batteries because it has high yields, low energy requirements, ease of separation from base metals and low greenhouse gas emissions. One such REE recovery using hydrochloric acid on a pilot scale yielded 91.6% lanthanum.
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Introduction to the Additive Manufacturing Powder Metallurgy Supply Chain
Authors: By Jason Dawes, Robert Bowerman and Ross Trepleton
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Methanol Production – A Technical History
By By Daniel Sheldon
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Lithium Recovery from Aqueous Resources and Batteries: A Brief Review
Authors: Ling Li, Vishwanath G. Deshmane, M. Parans Paranthaman, Ramesh Bhave, Bruce A. Moyer and Stephen Harrison
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Toward Platinum Group Metal-Free Catalysts for Hydrogen/Air Proton-Exchange Membrane Fuel Cells
Authors: Frédéric Jaouen, Deborah Jones, Nathan Coutard, Vincent Artero, Peter Strasser and Anthony Kucernak
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Methane Emission Control
By By Agnes Raj
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Secondary Lithium-Ion Battery Anodes: From First Commercial Batteries to Recent Research Activities
Authors: By Nicholas Loeffler, Dominic Bresser, Stefano Passerini and Mark Copley
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Challenges and Opportunities in Fast Pyrolysis of Biomass: Part I
By By Tony Bridgwater
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Ammonia and the Fertiliser Industry: The Development of Ammonia at Billingham
By By John Brightling
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