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Title: Coupling of electrochemically triggered thermal and mechanical effects to aggravate failure in a layered cathode

Abstract

Electrochemically driven functioning of a battery inevitably induces thermal and mechanical effects, which in turn couple with the electrochemical effect and collectively govern the performance of the battery. However, such a coupling effect, whether favorable or detrimental, has never been explicitly elucidated. Here we use in situ transmission electron microscopy to demonstrate such a coupling effect. We discover that thermally perturbating delithiated LiNi0.6Mn0.2Co0.2O2 will trigger explosive nucleation and propagation of intragranular cracks in the lattice, providing us a unique opportunity to directly visualize the cracking mechanism and dynamics. We reveal that thermal stress associated with electrochemically induced phase inhomogeneity and internal pressure resulting from oxygen release are the primary driving forces for intragranular cracking that resembles a “popcorn” fracture mechanism. The present work reveals that, for battery performance, the intricate coupling of electrochemical, thermal, and mechanical effects will surpass the superposition of individual effects.

Authors:
 [1];  [2]; ORCiD logo [3]; ORCiD logo [4];  [5];  [5]; ORCiD logo [5]; ORCiD logo [2];  [3]; ORCiD logo [4]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab.; Beijing Univ. of Technology (China). Inst. of Microstructure and Properties of Advanced Materials
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Energy and Environment Directorate
  3. Pennsylvania State Univ., University Park, PA (United States). Dept. of Engineering Science and Mechanics
  4. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab.
  5. Beijing Univ. of Technology (China). Inst. of Microstructure and Properties of Advanced Materials
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Pennsylvania State Univ., University Park, PA (United States); Beijing Univ. of Technology (China)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE Office of Science (SC), Biological and Environmental Research (BER); National Science Foundation (NSF); Chinese National Natural Science Fund for Innovative Research Groups; National Key Research and Development Program of China
OSTI Identifier:
1514257
Report Number(s):
PNNL-SA-134810
Journal ID: ISSN 2041-1723
Grant/Contract Number:  
AC05-76RL01830; AC02-05CH11231; CMMI-0900692; DMR-1610430; ECCS-1610331; 51621003; 2016YFB0700700
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; batteries

Citation Formats

Yan, Pengfei, Zheng, Jianming, Chen, Tianwu, Luo, Langli, Jiang, Yuyuan, Wang, Kuan, Sui, Manling, Zhang, Ji-Guang, Zhang, Sulin, and Wang, Chongmin. Coupling of electrochemically triggered thermal and mechanical effects to aggravate failure in a layered cathode. United States: N. p., 2018. Web. doi:10.1038/s41467-018-04862-w.
Yan, Pengfei, Zheng, Jianming, Chen, Tianwu, Luo, Langli, Jiang, Yuyuan, Wang, Kuan, Sui, Manling, Zhang, Ji-Guang, Zhang, Sulin, & Wang, Chongmin. Coupling of electrochemically triggered thermal and mechanical effects to aggravate failure in a layered cathode. United States. https://doi.org/10.1038/s41467-018-04862-w
Yan, Pengfei, Zheng, Jianming, Chen, Tianwu, Luo, Langli, Jiang, Yuyuan, Wang, Kuan, Sui, Manling, Zhang, Ji-Guang, Zhang, Sulin, and Wang, Chongmin. Fri . "Coupling of electrochemically triggered thermal and mechanical effects to aggravate failure in a layered cathode". United States. https://doi.org/10.1038/s41467-018-04862-w. https://www.osti.gov/servlets/purl/1514257.
@article{osti_1514257,
title = {Coupling of electrochemically triggered thermal and mechanical effects to aggravate failure in a layered cathode},
author = {Yan, Pengfei and Zheng, Jianming and Chen, Tianwu and Luo, Langli and Jiang, Yuyuan and Wang, Kuan and Sui, Manling and Zhang, Ji-Guang and Zhang, Sulin and Wang, Chongmin},
abstractNote = {Electrochemically driven functioning of a battery inevitably induces thermal and mechanical effects, which in turn couple with the electrochemical effect and collectively govern the performance of the battery. However, such a coupling effect, whether favorable or detrimental, has never been explicitly elucidated. Here we use in situ transmission electron microscopy to demonstrate such a coupling effect. We discover that thermally perturbating delithiated LiNi0.6Mn0.2Co0.2O2 will trigger explosive nucleation and propagation of intragranular cracks in the lattice, providing us a unique opportunity to directly visualize the cracking mechanism and dynamics. We reveal that thermal stress associated with electrochemically induced phase inhomogeneity and internal pressure resulting from oxygen release are the primary driving forces for intragranular cracking that resembles a “popcorn” fracture mechanism. The present work reveals that, for battery performance, the intricate coupling of electrochemical, thermal, and mechanical effects will surpass the superposition of individual effects.},
doi = {10.1038/s41467-018-04862-w},
journal = {Nature Communications},
number = ,
volume = 9,
place = {United States},
year = {Fri Jun 22 00:00:00 EDT 2018},
month = {Fri Jun 22 00:00:00 EDT 2018}
}

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Cited by: 154 works
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Figures / Tables:

Fig. 1 Fig. 1: Cycling performance and cracks of LiNi0.6Mn0.2Co0.2O2. a Capacity decay and b corresponding charge–discharge voltage profile evolution at cycling window 2.7–4.8 V. Cross-sectional high angle dark field (HAADF) images from (c) pristine sample d, e after 100 cycles at 2.7–4.5 V, f–h after 100 cycles at 2.7–4.8 V. Redmore » arrow in (d) highlights intergranular cracks formed during cycling. Red arrows in (f, g) highlight some intragranular cracks within primary particles. Yellow arrows in (g, h) highlight incubation cracks. The scale bars are 500 nm in (c–f), 10 nm in (g) and 2 nm in (h)« less

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.