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Title: Chemomechanical interplay of layered cathode materials undergoing fast charging in lithium batteries

Abstract

Morphological defects contribute to chronic and acute failures of batteries. The development of these morphological defects entails the multiscale chemo-mechanical coupling associated with internal mechanical stress. The mechanical stress, caused by anisotropic structural, chemical and state of charge (SOC) heterogeneities, is released through crack formation, undermining the continuous diffusion pathways of electrons and ions and creating fresh surfaces for electrode–electrolyte side reactions. The understanding of chemomechanical interplay has remained at the descriptive level, thus, the quantification or model to fingerprint these processes is highly desired. Herein, we systematically investigate the mesoscale morphological defects within LiNi 0.6Mn 0.2Co 0.2O 2 secondary particles that have gone through fast-charging conditions. With the advanced synchrotron X-ray tomography, we nondestructively pierce the internal volume of secondary particles and quantify the morphological outcomes of the crack formation, such as porosity and internal surface area. We then develop a numerical model to predict the crack-induced diffusion deterrent of electrons and lithium ions. The mismatch between the local ionic and electronic conductivity can lead to highly heterogeneous SOC distribution in secondary particles, which exponentially deteriorates as the current density increases. In conclusion, our incisive investigation of chemomechanical interplay and fast-charging can inform a knowledge base to accelerate themore » discovery of advanced materials that are resilient against chemomechanical failures.« less

Authors:
 [1];  [2];  [2];  [3];  [4];  [5];  [4];  [6]; ORCiD logo [3]; ORCiD logo [2];  [4]
  1. Nanjing University of Science and Technology, Jiangsu (China); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
  3. CAS, Beijing (China)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  5. Nanjing University of Science and Technology, Jiangsu (China)
  6. Purdue Univ., West Lafayette, IN (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1490861
Grant/Contract Number:  
2017YFB0102004; 51822211; DMR-1832613; DMR-1832707; AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Nano Energy
Additional Journal Information:
Journal Volume: 53; Journal Issue: C; Journal ID: ISSN 2211-2855
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; Cathode; Li-ion battery; Crack; Transmission X-ray microscopy; Fast charging; Chemomechanical interplay

Citation Formats

Xia, Sihao, Mu, Linqin, Xu, Zhengrui, Wang, Junyang, Wei, Chenxi, Liu, Lei, Pianetta, Piero, Zhao, Kejie, Yu, Xiqian, Lin, Feng, and Liu, Yijin. Chemomechanical interplay of layered cathode materials undergoing fast charging in lithium batteries. United States: N. p., 2018. Web. doi:10.1016/j.nanoen.2018.09.051.
Xia, Sihao, Mu, Linqin, Xu, Zhengrui, Wang, Junyang, Wei, Chenxi, Liu, Lei, Pianetta, Piero, Zhao, Kejie, Yu, Xiqian, Lin, Feng, & Liu, Yijin. Chemomechanical interplay of layered cathode materials undergoing fast charging in lithium batteries. United States. doi:10.1016/j.nanoen.2018.09.051.
Xia, Sihao, Mu, Linqin, Xu, Zhengrui, Wang, Junyang, Wei, Chenxi, Liu, Lei, Pianetta, Piero, Zhao, Kejie, Yu, Xiqian, Lin, Feng, and Liu, Yijin. Sat . "Chemomechanical interplay of layered cathode materials undergoing fast charging in lithium batteries". United States. doi:10.1016/j.nanoen.2018.09.051. https://www.osti.gov/servlets/purl/1490861.
@article{osti_1490861,
title = {Chemomechanical interplay of layered cathode materials undergoing fast charging in lithium batteries},
author = {Xia, Sihao and Mu, Linqin and Xu, Zhengrui and Wang, Junyang and Wei, Chenxi and Liu, Lei and Pianetta, Piero and Zhao, Kejie and Yu, Xiqian and Lin, Feng and Liu, Yijin},
abstractNote = {Morphological defects contribute to chronic and acute failures of batteries. The development of these morphological defects entails the multiscale chemo-mechanical coupling associated with internal mechanical stress. The mechanical stress, caused by anisotropic structural, chemical and state of charge (SOC) heterogeneities, is released through crack formation, undermining the continuous diffusion pathways of electrons and ions and creating fresh surfaces for electrode–electrolyte side reactions. The understanding of chemomechanical interplay has remained at the descriptive level, thus, the quantification or model to fingerprint these processes is highly desired. Herein, we systematically investigate the mesoscale morphological defects within LiNi0.6Mn0.2Co0.2O2 secondary particles that have gone through fast-charging conditions. With the advanced synchrotron X-ray tomography, we nondestructively pierce the internal volume of secondary particles and quantify the morphological outcomes of the crack formation, such as porosity and internal surface area. We then develop a numerical model to predict the crack-induced diffusion deterrent of electrons and lithium ions. The mismatch between the local ionic and electronic conductivity can lead to highly heterogeneous SOC distribution in secondary particles, which exponentially deteriorates as the current density increases. In conclusion, our incisive investigation of chemomechanical interplay and fast-charging can inform a knowledge base to accelerate the discovery of advanced materials that are resilient against chemomechanical failures.},
doi = {10.1016/j.nanoen.2018.09.051},
journal = {Nano Energy},
number = C,
volume = 53,
place = {United States},
year = {2018},
month = {9}
}

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