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Title: A Low-Cost Iron-Based Current Collector for Alkaline Battery Electrodes

Abstract

The use of three-dimensional porous nickel foam as the current collector of the nickel hydroxide electrode adds significantly to the cost of the nickel-based alkaline rechargeable batteries. Although iron is considerably less expensive than nickel, iron corrodes at the operating potential of the nickel hydroxide electrode. We have found that a 70–100 nm thick thermal coating of cobalt ferrite spinel protects the iron from corrosion. Such a coated iron substrate was found to be stable against corrosion even when polarized anodically at 10 mA cm -2 in 30% potassium hydroxide electrolyte for 1000 h. While the thermal coating of cobalt ferrite protected iron against corrosion, incorporation of lithium ions into the coating was found to enhance the electrical conductivity of the coating. XPS and EXAFS studies confirmed that the enhanced conductivity resulted from an increase in the population of Co 3+ in the ferrite spinel lattice. An inexpensive iron (steel) substrate protected by such a coating when used as a nickel hydroxide battery electrode exhibited a specific capacity of 0.25 Ah g -1 at C/5 discharge rate, comparable to a nickel hydroxide electrode based on a relatively expensive nickel foam substrate. The steel-based electrode also exhibited no noticeable degradation overmore » 150 cycles at C/2 rate. This demonstration of a robust and economical steel substrate presents a unique opportunity for reducing the cost of the nickel hydroxide battery electrode in alkaline batteries« less

Authors:
 [1];  [1];  [1];  [1];  [2];  [1]
  1. Univ. of Southern California, Los Angeles, CA (United States). Loker Hydrocarbon Research Inst.
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1596682
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Journal of The Electrochemical Society
Additional Journal Information:
Journal Volume: 167; Journal Issue: 2; Journal ID: ISSN 1945-7111
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

Citation Formats

Irshad, Ahamed, Mitra, D., Sundar Rajan, A., Trinh, P., Balasubramanian, M., and Narayanan, S. R. A Low-Cost Iron-Based Current Collector for Alkaline Battery Electrodes. United States: N. p., 2020. Web. doi:10.1149/1945-7111/ab6dd5.
Irshad, Ahamed, Mitra, D., Sundar Rajan, A., Trinh, P., Balasubramanian, M., & Narayanan, S. R. A Low-Cost Iron-Based Current Collector for Alkaline Battery Electrodes. United States. doi:10.1149/1945-7111/ab6dd5.
Irshad, Ahamed, Mitra, D., Sundar Rajan, A., Trinh, P., Balasubramanian, M., and Narayanan, S. R. Thu . "A Low-Cost Iron-Based Current Collector for Alkaline Battery Electrodes". United States. doi:10.1149/1945-7111/ab6dd5. https://www.osti.gov/servlets/purl/1596682.
@article{osti_1596682,
title = {A Low-Cost Iron-Based Current Collector for Alkaline Battery Electrodes},
author = {Irshad, Ahamed and Mitra, D. and Sundar Rajan, A. and Trinh, P. and Balasubramanian, M. and Narayanan, S. R.},
abstractNote = {The use of three-dimensional porous nickel foam as the current collector of the nickel hydroxide electrode adds significantly to the cost of the nickel-based alkaline rechargeable batteries. Although iron is considerably less expensive than nickel, iron corrodes at the operating potential of the nickel hydroxide electrode. We have found that a 70–100 nm thick thermal coating of cobalt ferrite spinel protects the iron from corrosion. Such a coated iron substrate was found to be stable against corrosion even when polarized anodically at 10 mA cm-2 in 30% potassium hydroxide electrolyte for 1000 h. While the thermal coating of cobalt ferrite protected iron against corrosion, incorporation of lithium ions into the coating was found to enhance the electrical conductivity of the coating. XPS and EXAFS studies confirmed that the enhanced conductivity resulted from an increase in the population of Co3+ in the ferrite spinel lattice. An inexpensive iron (steel) substrate protected by such a coating when used as a nickel hydroxide battery electrode exhibited a specific capacity of 0.25 Ah g-1 at C/5 discharge rate, comparable to a nickel hydroxide electrode based on a relatively expensive nickel foam substrate. The steel-based electrode also exhibited no noticeable degradation over 150 cycles at C/2 rate. This demonstration of a robust and economical steel substrate presents a unique opportunity for reducing the cost of the nickel hydroxide battery electrode in alkaline batteries},
doi = {10.1149/1945-7111/ab6dd5},
journal = {Journal of The Electrochemical Society},
number = 2,
volume = 167,
place = {United States},
year = {2020},
month = {1}
}

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