Detecting Li Dendrites in a Two‐Electrode Battery System

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 kinetical...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2019-04, Vol.31 (14), p.e1807405-n/a
Main Authors: Wang, Tuo, Salvatierra, Rodrigo Villegas, Tour, James M.
Format: Article
Language:English
Subjects:
Anodes
Batteries
battery
Coated electrodes
dendrites
Dendritic structure
detection
Li metal
Mass production
Power management
Rechargeable batteries
red phosphorus
safety
Separators
Shutdowns
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Summary: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. A detection system capable of alerting for Li dendrite formation in a two‐electrode battery is devised. When dendrites contact a red‐phosphorous‐coated separator, dendrite growth is shown by a 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.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201807405