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Title: 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 Inst. of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1502950
Patent Number(s):
10,211,457
Application Number:
15/046,104
Assignee:
California Institute of Technology (Pasadena, CA)
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 = {2019},
month = {2}
}

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