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Batteries 2017, 3(4), 36; doi:10.3390/batteries3040036

Effects of Boron-Incorporation in a V-Containing Zr-Based AB2 Metal Hydride Alloy

1
Department of Mechanical Engineering, Wayne State University, Detroit, MI 48202, USA
2
BASF/Battery Materials—Ovonic, 2983 Waterview Drive, Rochester Hills, MI 48309, USA
3
Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, MI 48202, USA
*
Author to whom correspondence should be addressed.
Received: 23 September 2017 / Revised: 23 October 2017 / Accepted: 25 October 2017 / Published: 14 November 2017
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Abstract

In this study, boron, a metalloid element commonly used in semiconductor applications, was added in a V-containing Zr-based AB2 metal hydride alloy. In general, as the boron content in the alloy increased, the high-rate dischargeability, surface exchange current, and double-layer capacitance first decreased and then increased whereas charge-transfer resistance and dot product of charge-transfer resistance and double-layer capacitance changed in the opposite direction. Electrochemical and gaseous phase characteristics of two boron-containing alloys, with the same boron content detected by the inductively coupled plasma optical emission spectrometer, showed significant variations in performances due to the difference in phase abundance of a newly formed tetragonal V3B2 phase. This new phase contributes to the increases in electrochemical high-rate dischargeability, surface exchange current, charge-transfer resistances at room, and low temperatures. However, the V3B2 phase does not contribute to the hydrogen storage capacities in either gaseous phase and electrochemical environment. View Full-Text
Keywords: metal hydride; nickel/metal hydride battery; Laves phase alloy; boron; electrochemistry; pressure concentration isotherm metal hydride; nickel/metal hydride battery; Laves phase alloy; boron; electrochemistry; pressure concentration isotherm
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MDPI and ACS Style

Chang, S.; Young, K.-H.; Ouchi, T.; Nei, J.; Wu, X. Effects of Boron-Incorporation in a V-Containing Zr-Based AB2 Metal Hydride Alloy. Batteries 2017, 3, 36.

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