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Systematic study on Li dendrite growth and suppression in pouch-type lithium-ion batteries with misaligned electrode pairs

Title
Systematic study on Li dendrite growth and suppression in pouch-type lithium-ion batteries with misaligned electrode pairs
Author(s)
Choi, SeungyeopKim, NayeonJin, DaheeRoh, YoungjoonKang, DongyoonLee, HyungjinHong, Seung-TaeLee, HongkyungLee, Yong Min
Issued Date
2023-09
Citation
Journal of Power Sources, v.579
Type
Article
Author Keywords
Electrode alignmentPouch-type full cellLithium dendriteInsulating layerLithium-ion batteries
Keywords
FAILURE MECHANISMSFIREEVOLUTIONBEHAVIORCELL
ISSN
0378-7753
Abstract
Among the various latent defects in pouch-type lithium-ion batteries (LIBs), electrode misalignment can occur during cell assembly or due to external impacts during actual operation. However, the effects of electrode misalignment on the electrochemical characteristics have not been sufficiently investigated, especially in pouch-type LIBs. Thus, we systematically design three pouch-type LIBs with different degrees of electrode misalignment (well-aligned, slightly misaligned, and largely misaligned configurations). As the degree of misalignment increases, not only the initial Coulombic efficiency but also the reversible discharge capacity decrease because of Li dendritic growth on the side of the Cu current collector (CC) that overlaps with the misaligned cathode. To address this unavoidable latent defect, we suggest a new strategy to block the side of the Cu CC through application of an insulating layer. This insulating layer can successfully improve both the initial Coulombic efficiency and reversible discharge capacity by efficiently suppressing Li dendritic growth. Thus, this simple idea is an excellent option for ensuring the safety of LIBs with misaligned electrode pairs. © 2023 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/46322
DOI
10.1016/j.jpowsour.2023.233265
Publisher
Elsevier BV
Related Researcher
  • 홍승태 Hong, Seung-Tae 에너지공학과
  • Research Interests Magnesium; calcium; and zinc ion batteries; lithium all-solid-state batteries; Inorganic materials discovery; Solid state chemistry; Crystallography; Mg; Ca; Zn 이온 이차전지; 리튬 전고체전지; 신 무기재료 합성; 고체화학; 결정화학
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Appears in Collections:
Department of Energy Science and Engineering Electrochemical Materials & Devices Laboratory 1. Journal Articles
Department of Energy Science and Engineering Battery Materials Discovery Laboratory 1. Journal Articles
Department of Energy Science and Engineering Battery Materials & Systems LAB 1. Journal Articles

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