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A bifunctional auxiliary electrode for safe lithium metal batteries

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Title
A bifunctional auxiliary electrode for safe lithium metal batteries
Author(s)
Moon S.; Tamwattana O.; Hyeokjun Park; Gabin Yoon; Seong W.M.; Lee M.H.; Park K.-Y.; Meethong N.; Kisuk Kang
Publication Date
2019-11
Journal
JOURNAL OF MATERIALS CHEMISTRY A, v.7, no.43, pp.24807 - 24813
Publisher
ROYAL SOC CHEMISTRY
Abstract
© 2019 The Royal Society of Chemistry.Increasing demands for performance beyond the limit of current lithium ion batteries for higher energy densities have rejuvenated research using lithium metal as an anode. However, commercial implementation has still been hampered due to safety issues. Herein, we introduce a lithium rechargeable battery system with an auxiliary electrode that can detect the potential signs of an internal short-circuit and simultaneously prevent cell failure by inhibiting further dendritic growth of lithium metal. Based on this working principle, we provide guidelines for an auxiliary electrode design and demonstrate that it can act as both a safety sensor and a lithium scavenger. Finally, we show that our in-house designed cell, using a flexible and self-standing auxiliary electrode, can effectively alert the danger of a short circuit in real-time without additional dendrite growth. We expect that this finding will open up unexplored opportunities utilizing various auxiliary electrode chemistries for safe rechargeable lithium metal batteries
URI
https://pr.ibs.re.kr/handle/8788114/6767
ISSN
2050-7488
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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