Corpus ID: 41082410

Recycling of nickel metal hydride (NiMH) batteries; Characterization and recovery of nickel, AB5 alloy and cobalt

  title={Recycling of nickel metal hydride (NiMH) batteries; Characterization and recovery of nickel, AB5 alloy and cobalt},
  author={Filip Holmberg},
Nickel metal hydride (NiMH) batteries are used today for applications that can assist in the adaptation toward carbon-neutral energy sources (i.e. hybrid vehicles and smart grids). Recovery of metals such as nickel, cobalt and rare earth elements (REEs) from discarded NiMH batteries is important for economic and/or technological reasons. Recirculation of valuable materials back into society can be achieved by the production of pure concentrates of elements from waste, or by regenerating and… Expand
Recycling of spent lithium nickel-cobalt batteries through leaching of nickel and cobalt from cathode material
This research paper investigates a hydrometallurgical approach that includes the leaching of spent lithium-ion battery cathode material. The targeted elements to be recovered are cobalt and nickelExpand
Leaching mechanisms of industrial powders of spent NiMH batteries in a pilot-scale reactor.
A selective dissolution of REEs with respect to nickel for both acid at pH 3, attributed to (i) the kinetic inhibition of nickel metal dissolution and (ii) the specific core-shell structure of aged mischmetal particles. Expand
Characterization of the gas composition inside NiMH batteries during charge using GC-MS
The aim of the project was to develop a method to measure and studythe degree of activation of the negative electrode (MH) in a NiMH battery.This was done by characterization of the gases produced ...


Characterization of spent nickel–metal hydride batteries and a preliminary economic evaluation of the recovery processes
Results of this study show that metallic components account for more than 60% of battery weight, when Ni, Fe, Co, and rare earth elements (REEs) were 17.9%, 15.4%, 4.41%, and 17.3%, respectively, in a single battery. Expand
Recycling of nickel–metal hydride batteries. I: Dissolution and solvent extraction of metals
Nickel–metal hydride batteries contain valuable metallic components and although they are not considered a hazardous waste, recovery of these materials is necessary from an economic point of view. InExpand
Recycling of nickel–metal hydride batteries. II: Electrochemical deposition of cobalt and nickel
A combination of hydrometallurgical and electrochemical processes has been developed for the separation and recovery of nickel and cobalt from cylindrical nickel–metal hydride rechargeable batteries.Expand
Ni-MH spent batteries: a raw material to produce Ni-Co alloys.
In the present work, the main problems during leach liquor purification are the removal of elements such as Mn, Zn, Cd, dissolved during the leaching step, and the separation of Ni from Co, which is overcome by co-deposition of a Ni-35/40%w Co alloy of good quality. Expand
Hydrometallurgical separation of rare earth elements, cobalt and nickel from spent nickel–metal–hydride batteries
Abstract The separation of rare earth elements, cobalt and nickel from NiMH battery residues is evaluated in this paper. Analysis of the internal content of the NiMH batteries shows that nickel isExpand
Spent NiMH batteries—The role of selective precipitation in the recovery of valuable metals
Abstract The production of electronic equipment, such as computers and cell phones, and, consequently, batteries, has increased dramatically. One of the types of batteries whose production andExpand
Recovery of metal values from spent nickel–metal hydride rechargeable batteries
Abstract A hydrometallurgical process is developed for the separation and recovery of metal values such as nickel, cobalt and rare earths from spent nickel–metal hydride (Ni–MH) rechargeableExpand
Rare earths recovery from NiMH spent batteries
Nickel-metal hydride batteries (NiMH) contain rare earths (RE) and a variety of valuable metals such as nickel and cobalt. Using a hydrometallurgical process developed for the recovery of metals fromExpand
Characterization and leaching of NiCd and NiMH spent batteries for the recovery of metals.
The characterization of NiMH and NiCd spent batteries and the results of leaching tests in different conditions are reported and hydroxide compounds can be readily leached while Ni present as metallic form requires more aggressive conditions due to kinetic constraints. Expand
Recovery of valuable metals from anode material of hydrogen-nickel battery
Simultaneous recovery of rare earth, nickel and cobalt resources from the anode material of hydrogen-nickel battery was performed through a hydrometallurgical process. Most of rare earth elements areExpand