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Batteries 2017, 3(4), 35; doi:10.3390/batteries3040035

Performance Comparison between AB5 and Superlattice Metal Hydride Alloys in Sealed Cells

1
BASF/Battery Materials—Ovonic, 2983 Waterview Drive, Rochester Hills, MI 48309, USA
2
Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, MI 48202, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Sheng S. Zhang
Received: 27 September 2017 / Revised: 11 October 2017 / Accepted: 17 October 2017 / Published: 6 November 2017
(This article belongs to the Special Issue Nickel Metal Hydride Batteries 2017)
View Full-Text   |   Download PDF [3442 KB, uploaded 6 November 2017]   |  

Abstract

High-power cylindrical nickel metal/hydride batteries using a misch metal-based Al-free superlattice alloy with a composition of La11.3Pr1.7Nd5.1Mg4.5Ni63.6Co13.6Zr0.2 were fabricated and evaluated against those using a standard AB5 metal hydride alloy. At room temperature, cells made with the superlattice alloy showed a 40% lower internal resistance and a 59% lower surface charge-transfer resistance compared to cells made with the AB5 alloy. At a low temperature (−10 °C), cells made with the superlattice alloy demonstrated an 18% lower internal resistance and a 60% lower surface charge-transfer resistance compared to cells made with the AB5 alloy. Cells made with the superlattice alloy exhibited a better charge retention at −10 °C. A cycle life comparison in a regular cell configuration indicated that the Al-free superlattice alloy contributes to a shorter cycle life as a result of the pulverization from the lattice expansion of the main phase. View Full-Text
Keywords: metal hydride (MH); nickel/metal hydride (Ni/MH) battery; hydrogen-absorbing alloy; electrochemistry; superlattice alloy metal hydride (MH); nickel/metal hydride (Ni/MH) battery; hydrogen-absorbing alloy; electrochemistry; superlattice alloy
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Koch, J.M.; Young, K.-H.; Nei, J.; Hu, C.; Reichman, B. Performance Comparison between AB5 and Superlattice Metal Hydride Alloys in Sealed Cells. Batteries 2017, 3, 35.

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