Understanding the limitations of lithium ion batteries at high rates

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Understanding the limitations of lithium ion batteries at high rates. / Lain, Michael J.; Kendrick, Emma.

In: Journal of Power Sources, Vol. 493, 229690, 01.05.2021.

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@article{81988b56431a4da099982e5081906543,
title = "Understanding the limitations of lithium ion batteries at high rates",
abstract = "Commercial lithium ion cells with different power: energy ratios were disassembled, to allow the electrochemical performance of their electrodes to be evaluated. Tests on coin cell half cells included rate tests (continuous and pulsed), resistance measurements, and extended pulse tests. Pulse power tests at high rates typically showed three limiting processes within a 10 s pulse; an instantaneous resistance increase, a solid state diffusion limited stage, and then electrolyte depletion/saturation. On anodes, the third process can also be lithium plating. Most of the cells were rated for a 10 C continuous discharge, and the cathode charging voltage at 10 C was around 4.2 V. For anodes, the maximum charge current to avoid a negative voltage was 3–5 C. Negative anode voltages do not necessarily mean that lithium plating has occurred. However, lithium deposits were observed on all the anodes after 5000 pulse sequences with 10 s pulses at ± 20 C.",
keywords = "Asymmetric diffusion, HEV, Lithium ion, Power density, Rate limitation",
author = "Lain, {Michael J.} and Emma Kendrick",
note = "Funding Information: This work was undertaken as part of a contract with the Advanced Propulsion Centre (www.apcuk.co.uk). WMG gratefully acknowledge this funding from APC. Publisher Copyright: {\textcopyright} 2021 The Authors",
year = "2021",
month = may,
day = "1",
doi = "10.1016/j.jpowsour.2021.229690",
language = "English",
volume = "493",
journal = "Journal of Power Sources",
issn = "0378-7753",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Understanding the limitations of lithium ion batteries at high rates

AU - Lain, Michael J.

AU - Kendrick, Emma

N1 - Funding Information: This work was undertaken as part of a contract with the Advanced Propulsion Centre (www.apcuk.co.uk). WMG gratefully acknowledge this funding from APC. Publisher Copyright: © 2021 The Authors

PY - 2021/5/1

Y1 - 2021/5/1

N2 - Commercial lithium ion cells with different power: energy ratios were disassembled, to allow the electrochemical performance of their electrodes to be evaluated. Tests on coin cell half cells included rate tests (continuous and pulsed), resistance measurements, and extended pulse tests. Pulse power tests at high rates typically showed three limiting processes within a 10 s pulse; an instantaneous resistance increase, a solid state diffusion limited stage, and then electrolyte depletion/saturation. On anodes, the third process can also be lithium plating. Most of the cells were rated for a 10 C continuous discharge, and the cathode charging voltage at 10 C was around 4.2 V. For anodes, the maximum charge current to avoid a negative voltage was 3–5 C. Negative anode voltages do not necessarily mean that lithium plating has occurred. However, lithium deposits were observed on all the anodes after 5000 pulse sequences with 10 s pulses at ± 20 C.

AB - Commercial lithium ion cells with different power: energy ratios were disassembled, to allow the electrochemical performance of their electrodes to be evaluated. Tests on coin cell half cells included rate tests (continuous and pulsed), resistance measurements, and extended pulse tests. Pulse power tests at high rates typically showed three limiting processes within a 10 s pulse; an instantaneous resistance increase, a solid state diffusion limited stage, and then electrolyte depletion/saturation. On anodes, the third process can also be lithium plating. Most of the cells were rated for a 10 C continuous discharge, and the cathode charging voltage at 10 C was around 4.2 V. For anodes, the maximum charge current to avoid a negative voltage was 3–5 C. Negative anode voltages do not necessarily mean that lithium plating has occurred. However, lithium deposits were observed on all the anodes after 5000 pulse sequences with 10 s pulses at ± 20 C.

KW - Asymmetric diffusion

KW - HEV

KW - Lithium ion

KW - Power density

KW - Rate limitation

UR - http://www.scopus.com/inward/record.url?scp=85102246993&partnerID=8YFLogxK

U2 - 10.1016/j.jpowsour.2021.229690

DO - 10.1016/j.jpowsour.2021.229690

M3 - Article

AN - SCOPUS:85102246993

VL - 493

JO - Journal of Power Sources

JF - Journal of Power Sources

SN - 0378-7753

M1 - 229690

ER -