Hostname: page-component-7479d7b7d-rvbq7 Total loading time: 0 Render date: 2024-07-08T05:45:56.493Z Has data issue: false hasContentIssue false
  • English
  • Français

High Performance Zr-based Metal Hydride Alloys For Nickel Metal Hydride Batteries

Published online by Cambridge University Press:  10 February 2011

R. C. Young ,
S. R. OVSHINSKY ,
B. HUANG ,
B S. CHAO  and
Y. LI
R. C. Young
Affiliation:
Energy Conversion Devices, Inc, 1675 West Maple Road, Troy, MI. 48084
S. R. OVSHINSKY
Affiliation:
Energy Conversion Devices, Inc, 1675 West Maple Road, Troy, MI. 48084
B. HUANG
Affiliation:
Energy Conversion Devices, Inc, 1675 West Maple Road, Troy, MI. 48084
B S. CHAO
Affiliation:
Energy Conversion Devices, Inc, 1675 West Maple Road, Troy, MI. 48084
Y. LI
Affiliation:
Energy Conversion Devices, Inc, 1675 West Maple Road, Troy, MI. 48084
Get access

Abstract

Based upon Ovonic's multi-element, atomic engineering approach, two families of alloys are being used in commercial Nickel Metal Hydride (NiMH) rechargeable batteries, i.e. the mischmetal (Mm) based AB5 and Zr based AB2 alloys. While Mm based alloys are faster to activate, are limited by a discharge capacity of only 320–340 mAh/g. The Zr based alloy, although slightly slower to activate, provides a much higher discharge capacity. In this paper, we first discuss the use of Ovonic's multi-element approach to generate a spectrum of disordered local environments. We then present experimental data to illustrate that through these atomically engineered local environments, we are able to control the hydrogen site occupancy, discharge capacity, kinetics, and surface states. The Zr based alloy with a specific discharge capacity of 465 mAh/g and excellent rate capability has been demonstrated.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 575: Symposium CC – New Materials for Batteries & Fuel Cells , 1999 , 187
Copyright
Copyright © Materials Research Society 2000

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Sapru, K., Reichman, B., Reger, A., Ovshinsky, S.R., U.S. Patent 4 623 597 (1986)Google Scholar
2. See for example Ovshinsky, S.R., “Disordered Materials” amorphous Institute Press, Bloomfield Hill, MI (1982) and Ovshinsky, S.R., ‘Disordered Materials” Plenum Press, New York and London, 1991 and references therein.Google Scholar
3. Ovshinsky, S.R., Fetcenko, M.A., Ross, J., Science 260, 176(1993)Google Scholar
4. Ovshinsky, S.R., Mater. Res. Soc. Proc., Nov.30-Dec.4,1998, to be publishedGoogle Scholar
5. Chao, B. S., Young, R.C., Pawlik, D.A., Im, J.S, Huang, B., Chakoumakos, B. C., Mater. Res. Soc. Proc., Spring, (1999), to be publichedGoogle Scholar
6. Bernauer, O., Topler, J., Noreus, D., Hempelmann, R. and Richter, D., Int. J. Hydrogen Energy, vol.14, no.3, 187 (1989)Google Scholar
7. Buschow, K.H.J., Bouten, P.C.P. and Miedema, A.R., Rep. Prog. Phys., vol. 45, 937, (1982)Google Scholar
8. Shaltiel, D., Jacob, I. and Davidov., D. J. Less-common Met. 53, 117(1977)Google Scholar