Metal hydride alloys with improved rate performance
Abstract
Methods of preparing improved metal hydride alloy materials are provided. The alloys include a mixture of at least four of vanadium, titanium, nickel, chromium, and iron. The alloy is processed by at least one of thermal and physical treatment to generate a refined microstructure exhibiting improved kinetics when used as electrodes in MH batteries (e.g., higher discharge current). The thermal treatment includes rapid cooling of the alloy at greater than 10.sup.4 K/s. The physical treatment includes mechanical pulverization of the alloy after cooling. The microstructure is a single phase (body centered cubic) with a heterogeneous composition including a plurality of primary regions having a lattice parameter selected from the range of 3.02 .ANG. to 3.22 .ANG. and a plurality of secondary regions having a lattice parameter selected from the range of 3.00 .ANG. to 3.22 .ANG. and at least one physical dimension having a maximum average value less than 1 .mu.m.
- Inventors:
- Issue Date:
- Research Org.:
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1502950
- Patent Number(s):
- 10211457
- Application Number:
- 15/046,104
- Assignee:
- California Institute of Technology (Pasadena, CA)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B22 - CASTING B22D - CASTING OF METALS
B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER
- DOE Contract Number:
- SC0001057
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2016 Feb 17
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Weadock, Nicholas J., Tan, Hongjin, Fultz, Brent T., and Yang, Heng. Metal hydride alloys with improved rate performance. United States: N. p., 2019.
Web.
Weadock, Nicholas J., Tan, Hongjin, Fultz, Brent T., & Yang, Heng. Metal hydride alloys with improved rate performance. United States.
Weadock, Nicholas J., Tan, Hongjin, Fultz, Brent T., and Yang, Heng. Tue .
"Metal hydride alloys with improved rate performance". United States. https://www.osti.gov/servlets/purl/1502950.
@article{osti_1502950,
title = {Metal hydride alloys with improved rate performance},
author = {Weadock, Nicholas J. and Tan, Hongjin and Fultz, Brent T. and Yang, Heng},
abstractNote = {Methods of preparing improved metal hydride alloy materials are provided. The alloys include a mixture of at least four of vanadium, titanium, nickel, chromium, and iron. The alloy is processed by at least one of thermal and physical treatment to generate a refined microstructure exhibiting improved kinetics when used as electrodes in MH batteries (e.g., higher discharge current). The thermal treatment includes rapid cooling of the alloy at greater than 10.sup.4 K/s. The physical treatment includes mechanical pulverization of the alloy after cooling. The microstructure is a single phase (body centered cubic) with a heterogeneous composition including a plurality of primary regions having a lattice parameter selected from the range of 3.02 .ANG. to 3.22 .ANG. and a plurality of secondary regions having a lattice parameter selected from the range of 3.00 .ANG. to 3.22 .ANG. and at least one physical dimension having a maximum average value less than 1 .mu.m.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 19 00:00:00 EST 2019},
month = {Tue Feb 19 00:00:00 EST 2019}
}
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