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Title: Theoretical Considerations for Improving the Pulse Power of a Battery through the Addition of a Second Electrochemically Active Material

Abstract

Here, porous electrode theory is used to conduct case studies for when the addition of a second electrochemically active material can improve the pulse-power performance of an electrode. Case studies are conducted for the positive electrode of a sodium metal-halide battery and the graphite negative electrode of a lithium “rocking chair” battery. The replacement of a fraction of the nickel chloride capacity with iron chloride in a sodium metal-halide electrode and the replacement of a fraction of the graphite capacity with carbon black in a lithium-ion negative electrode were both predicted to increase the maximum pulse power by up to 40%. In general, whether or not a second electrochemically active material increases the pulse power depends on the relative importance of ohmic-to-charge transfer resistances within the porous structure, the capacity fraction of the second electrochemically active material, and the kinetic and thermodynamic parameters of the two active materials.

Authors:
 [1];  [1]
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  1. Columbia Univ., New York, NY (United States)
Publication Date:
Research Org.:
Columbia Univ., New York, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1436685
Grant/Contract Number:  
SC0012673
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 163; Journal Issue: 8; Journal ID: ISSN 0013-4651
Publisher:
The Electrochemical Society
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; depth of discharge; electrode design; high current; lithium-ion; ZEBRA

Citation Formats

Knehr, K. W., and West, Alan C. Theoretical Considerations for Improving the Pulse Power of a Battery through the Addition of a Second Electrochemically Active Material. United States: N. p., 2016. Web. doi:10.1149/2.0621608jes.
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Knehr, K. W., & West, Alan C. Theoretical Considerations for Improving the Pulse Power of a Battery through the Addition of a Second Electrochemically Active Material. United States. https://doi.org/10.1149/2.0621608jes
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Knehr, K. W., and West, Alan C. Thu . "Theoretical Considerations for Improving the Pulse Power of a Battery through the Addition of a Second Electrochemically Active Material". United States. https://doi.org/10.1149/2.0621608jes. https://www.osti.gov/servlets/purl/1436685.
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@article{osti_1436685,
title = {Theoretical Considerations for Improving the Pulse Power of a Battery through the Addition of a Second Electrochemically Active Material},
author = {Knehr, K. W. and West, Alan C.},
abstractNote = {Here, porous electrode theory is used to conduct case studies for when the addition of a second electrochemically active material can improve the pulse-power performance of an electrode. Case studies are conducted for the positive electrode of a sodium metal-halide battery and the graphite negative electrode of a lithium “rocking chair” battery. The replacement of a fraction of the nickel chloride capacity with iron chloride in a sodium metal-halide electrode and the replacement of a fraction of the graphite capacity with carbon black in a lithium-ion negative electrode were both predicted to increase the maximum pulse power by up to 40%. In general, whether or not a second electrochemically active material increases the pulse power depends on the relative importance of ohmic-to-charge transfer resistances within the porous structure, the capacity fraction of the second electrochemically active material, and the kinetic and thermodynamic parameters of the two active materials.},
doi = {10.1149/2.0621608jes},
journal = {Journal of the Electrochemical Society},
number = 8,
volume = 163,
place = {United States},
year = {Thu May 26 00:00:00 EDT 2016},
month = {Thu May 26 00:00:00 EDT 2016}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1149/2.0621608jes
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Cited by: 3 works
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Figures / Tables:

Figure 1 Figure 1: Schematic detailing how the addition of a second electrochemically active material can decrease the ionic resistance within an electrode during pulse-power operation at high depths of discharge. The schematic is valid for electrodes where the ionic resistance is much larger than the ohmic resistance.
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    Figures / Tables found in this record:

    Figure 1 (p. 1)figure
    Figure 2 (p. 2)figure
    Table I (p. 3)table
    Figure 3 (p. 4)figure
    Figure 4 (p. 4)figure
    Figure 5 (p. 4)figure
    Figure 6 (p. 5)figure
    Figure 7 (p. 5)figure
    Figure 8 (p. 6)figure
    Figure 9 (p. 6)figure
    Figure 10 (p. 7)figure
    Table II (p. 7)table
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