Recent Progress in the Development of Ovonic Nickel Metal Hydride Battteries for Electric Vehicles

1992 ◽  
Author(s):  
S. R. Ovshinsky ◽  
S. Venkatesan ◽  
M. A. Fetcenko ◽  
P. R. Gifford ◽  
D. Corrigan ◽  
...  
Keyword(s):  
Electric Vehicles ◽  
Metal Hydride ◽  
Recent Progress ◽  
Nickel Metal ◽  
Nickel Metal Hydride

A Nickel Metal Hydride Battery for Electric Vehicles

Science ◽  
1993 ◽  
Vol 260 (5105) ◽  
pp. 176-181 ◽  
Author(s):  
S. R. Ovshinsky ◽  
M. A. Fetcenko ◽  
J. Ross
Keyword(s):  
Electric Vehicles ◽  
Metal Hydride ◽  
Nickel Metal ◽  
Nickel Metal Hydride ◽  
Nickel Metal Hydride Battery ◽  
Hydride Battery

scholarly journals Improvement of Nickel Metal Hydride Battery with Non-foam Nickel Electrode for Hybrid Electric Vehicles Applications

2006 ◽  
Vol 74 (5) ◽  
pp. 385-393
Author(s):  
Hiroshi FUKUNAGA ◽  
Mitsuhiro KISHIMI ◽  
Nobuaki MATSUMOTO ◽  
Toshiki TANAKA ◽  
Tomonori KISHIMOTO ◽  
...  
Keyword(s):  
Electric Vehicles ◽  
Metal Hydride ◽  
Hybrid Electric Vehicles ◽  
Nickel Electrode ◽  
Nickel Metal ◽  
Nickel Metal Hydride ◽  
Nickel Metal Hydride Battery ◽  
Hybrid Electric ◽  
Hydride Battery

scholarly journals Recovery of Rare Earth Metals (REMs) from Nickel Metal Hydride Batteries of Electric Vehicles

Minerals ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 34
Author(s):  
Manis Kumar Jha ◽  
Pankaj Kumar Choubey ◽  
Om Shankar Dinkar ◽  
Rekha Panda ◽  
Rajesh Kumar Jyothi ◽  
...  
Keyword(s):  
Rare Earth ◽  
Electric Vehicles ◽  
Metal Hydride ◽  
Rare Earth Metals ◽  
High Energy ◽  
Leach Liquor ◽  
High Energy Density ◽  
Flow Sheet ◽  
Nickel Metal ◽  
Nickel Metal Hydride

Nickel metal hydride (NiMH) batteries are extensively used in the manufacturing of portable electronic devices as well as electric vehicles due to their specific properties including high energy density, precise volume, resistance to overcharge, etc. These NiMH batteries contain significant amounts of rare earth metals (REMs) along with Co and Ni which are discarded due to illegal dumping and improper recycling practices. In view of their strategic, economic, and industrial importance, and to mitigate the demand and supply gap of REMs and the limited availability of natural resources, it is necessary to explore secondary resources of REMs. Therefore, the present paper reports a feasible hydrometallurgical process flowsheet for the recovery of REMs and valuable metals from spent NiMH batteries. More than 90% dissolution of REMs (Nd, Ce and La) was achieved using 2 M H2SO4 at 75 °C in 60 min in the presence of 10% H2O2 (v/v). From the obtained leach liquor, the REMs, such as Nd and Ce, were recovered using 10% PC88A diluted in kerosene at eq. pH 1.5 and O/A ratio 1/1 in two stages of counter current extraction. La of 99% purity was selectively precipitated from the leach liquor in the pH range of 1.5 to 2.0, leaving Cu, Ni and Co in the filtrate. Further, Cu and Ni were extracted with LIX 84 at equilibrium pH 2.5 and 5, leaving Co in the raffinate. The developed process flow sheet is feasible and has potential for industrial exploitation after scale-up/pilot trails.

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