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Title: Dynamic Lithium Distribution upon Dendrite Growth and Shorting Revealed by Operando Neutron Imaging

Abstract

Lithium (Li) metal has the highest theoretical capacity and is crucial for energy storage technologies beyond conventional Li chemistries. Yet, its utilization inevitably leads to dendrite growth from repeated plating and stripping, eventually shorts the battery. The process that leads to shorting and the consequential electrochemical impacts are not well understood due to its dynamic features. Herein, we apply neutron radiography to study the Li dendrite growth in real time. The dynamic distribution of Li flowing from the anode to cathode during charge, induced by the internal short circuit due to Li dendrite growth, has been observed. Moreover, a competing mechanism after battery shorting between the short-induced self-discharge and charge is proposed to explain the voltage drop/rise during the extended charging time. Our work provides mechanistic insights with a deep understanding of dendrite Li shorting and redistribution. This can lead to safe design principles of Li metal electrodes in batteries.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division; USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1561651
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
ACS Energy Letters
Additional Journal Information:
Journal Volume: 4; Journal ID: ISSN 2380-8195
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

Citation Formats

Song, Bohang, Dhiman, Indu, Carothers, John C., Veith, Gabriel M., Liu, Jue, Bilheux, Hassina Z., and Huq, Ashfia. Dynamic Lithium Distribution upon Dendrite Growth and Shorting Revealed by Operando Neutron Imaging. United States: N. p., 2019. Web. doi:10.1021/acsenergylett.9b01652.
Song, Bohang, Dhiman, Indu, Carothers, John C., Veith, Gabriel M., Liu, Jue, Bilheux, Hassina Z., & Huq, Ashfia. Dynamic Lithium Distribution upon Dendrite Growth and Shorting Revealed by Operando Neutron Imaging. United States. doi:10.1021/acsenergylett.9b01652.
Song, Bohang, Dhiman, Indu, Carothers, John C., Veith, Gabriel M., Liu, Jue, Bilheux, Hassina Z., and Huq, Ashfia. Wed . "Dynamic Lithium Distribution upon Dendrite Growth and Shorting Revealed by Operando Neutron Imaging". United States. doi:10.1021/acsenergylett.9b01652.
@article{osti_1561651,
title = {Dynamic Lithium Distribution upon Dendrite Growth and Shorting Revealed by Operando Neutron Imaging},
author = {Song, Bohang and Dhiman, Indu and Carothers, John C. and Veith, Gabriel M. and Liu, Jue and Bilheux, Hassina Z. and Huq, Ashfia},
abstractNote = {Lithium (Li) metal has the highest theoretical capacity and is crucial for energy storage technologies beyond conventional Li chemistries. Yet, its utilization inevitably leads to dendrite growth from repeated plating and stripping, eventually shorts the battery. The process that leads to shorting and the consequential electrochemical impacts are not well understood due to its dynamic features. Herein, we apply neutron radiography to study the Li dendrite growth in real time. The dynamic distribution of Li flowing from the anode to cathode during charge, induced by the internal short circuit due to Li dendrite growth, has been observed. Moreover, a competing mechanism after battery shorting between the short-induced self-discharge and charge is proposed to explain the voltage drop/rise during the extended charging time. Our work provides mechanistic insights with a deep understanding of dendrite Li shorting and redistribution. This can lead to safe design principles of Li metal electrodes in batteries.},
doi = {10.1021/acsenergylett.9b01652},
journal = {ACS Energy Letters},
number = ,
volume = 4,
place = {United States},
year = {2019},
month = {9}
}

Journal Article:
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This content will become publicly available on September 11, 2020
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