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Detecting Li Dendrites in a Two‐Electrode Battery System
Author(s) -
Wang Tuo,
Salvatierra Rodrigo Villegas,
Tour James M.
Publication year - 2019
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201807405
Subject(s) - dendrite (mathematics) , materials science , anode , battery (electricity) , electrode , separator (oil production) , cathode , nanotechnology , electrical engineering , chemistry , power (physics) , physics , geometry , mathematics , quantum mechanics , thermodynamics , engineering
The use of high‐energy‐density Li metal anodes in rechargeable batteries is not possible because of dendrite formation that can potentially result in a battery fire. Although so‐called dendrite‐free Li metal anodes have been reported in many recent publications, Li dendrite growth is still kinetically favorable and it remains a severe safety concern in mass production. Here, a detection system capable of alerting for Li dendrite formation in a two‐electrode battery with no additional electrodes required is reported. When dendrites contact a red phosphorous‐coated separator, dendrite growth is revealed by a significant voltage change. This can activate a signal through the battery management system, warning of the presence of Li dendrites and leading to shutdown of the battery before the dendrites become dangerous.