Direct Observation of the Growth of Lithium Dendrites on Graphite Anodes by Operando EC‐AFM

Shen, Cai; Hu, Guohong; Cheong, Ling‐Zhi; Huang, Shiqiang; Zhang, Ji‐Guang; Wang, Deyu

doi:10.1002/smtd.201700298

Title: Direct Observation of the Growth of Lithium Dendrites on Graphite Anodes by Operando EC‐AFM

Abstract

Abstract Lithium dendrite growth is one of the most challenging problems affecting the safety performance of lithium‐ion batteries (LIBs). It causes low Coulombic efficiency as well as safety hazards for LIBs. Understanding the evolution process of Li‐dendrite growth at the nanoscale is critical for solving this problem. Herein, an in situ electrochemical atomic force microscopy (EC‐AFM) investigation of the initial Li deposition in ethylene carbonate (EC)‐based and fluoroethylene carbonate (FEC)‐based electrolytes on graphite anodes is reported. These results show that the solid electrolyte interphase (SEI) formed from the FEC‐based electrolyte can suppress Li‐dendrite growth. The FEC‐based electrolyte induces formation of LiF‐rich SEI films, which are harder and denser than those formed in an EC‐based electrolyte. Due to its better mechanical properties and larger resistance, the SEI layer formed from the FEC‐based electrolyte is sufficient to prevent reduction of Li ⁺ ions and deposition of Li ⁺ ions on the anode surface. These results demonstrate that EC‐AFM is a powerful in situ technique for the study of lithium‐dendrite growth.

Authors:

^[1]; Hu, Guohong ^[2]; Cheong, Ling‐Zhi ^[3]; Huang, Shiqiang ^[1]; Zhang, Ji‐Guang ^[4]; Wang, Deyu ^[1]

Ningbo Institute of Materials Technology &, Engineering Chinese Academy of Sciences 1219 Zhongguan Road Ningbo 315201 China
Ningbo Institute of Materials Technology &, Engineering Chinese Academy of Sciences 1219 Zhongguan Road Ningbo 315201 China, Nano Science and Technology University of Science and Technology of China Suzhou 215123 China
School of Marine Science Ningbo University Ningbo 315211 China
Energy and Environment Directorate Pacific Northwest National Laboratory Richland WA 99354 USA

Publication Date:: Wed Dec 20 00:00:00 EST 2017

Sponsoring Org.:: USDOE

OSTI Identifier:: 1420004

Grant/Contract Number:: DEAC02‐98CH10886

Resource Type:: Publisher's Accepted Manuscript

Journal Name:: Small Methods

Additional Journal Information:: Journal Name: Small Methods Journal Volume: 2 Journal Issue: 2; Journal ID: ISSN 2366-9608

Publisher:: Wiley Blackwell (John Wiley & Sons)

Country of Publication:: United States

Language:: English

Citation Formats


                    Shen, Cai, Hu, Guohong, Cheong, Ling‐Zhi, Huang, Shiqiang, Zhang, Ji‐Guang, and Wang, Deyu. Direct Observation of the Growth of Lithium Dendrites on Graphite Anodes by Operando EC‐AFM.  United States: N. p., 2017. 
Web.  doi:10.1002/smtd.201700298.

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                    Shen, Cai, Hu, Guohong, Cheong, Ling‐Zhi, Huang, Shiqiang, Zhang, Ji‐Guang, & Wang, Deyu. Direct Observation of the Growth of Lithium Dendrites on Graphite Anodes by Operando EC‐AFM.  United States.  https://doi.org/10.1002/smtd.201700298

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                    Shen, Cai, Hu, Guohong, Cheong, Ling‐Zhi, Huang, Shiqiang, Zhang, Ji‐Guang, and Wang, Deyu. Wed .  
"Direct Observation of the Growth of Lithium Dendrites on Graphite Anodes by Operando EC‐AFM".  United States.  https://doi.org/10.1002/smtd.201700298.

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@article{osti_1420004,

  title        = {Direct Observation of the Growth of Lithium Dendrites on Graphite Anodes by Operando EC‐AFM},

  author       = {Shen, Cai and Hu, Guohong and Cheong, Ling‐Zhi and Huang, Shiqiang and Zhang, Ji‐Guang and Wang, Deyu},

  abstractNote = {Abstract Lithium dendrite growth is one of the most challenging problems affecting the safety performance of lithium‐ion batteries (LIBs). It causes low Coulombic efficiency as well as safety hazards for LIBs. Understanding the evolution process of Li‐dendrite growth at the nanoscale is critical for solving this problem. Herein, an in situ electrochemical atomic force microscopy (EC‐AFM) investigation of the initial Li deposition in ethylene carbonate (EC)‐based and fluoroethylene carbonate (FEC)‐based electrolytes on graphite anodes is reported. These results show that the solid electrolyte interphase (SEI) formed from the FEC‐based electrolyte can suppress Li‐dendrite growth. The FEC‐based electrolyte induces formation of LiF‐rich SEI films, which are harder and denser than those formed in an EC‐based electrolyte. Due to its better mechanical properties and larger resistance, the SEI layer formed from the FEC‐based electrolyte is sufficient to prevent reduction of Li + ions and deposition of Li + ions on the anode surface. These results demonstrate that EC‐AFM is a powerful in situ technique for the study of lithium‐dendrite growth.},

  doi          = {10.1002/smtd.201700298},

  journal      = {Small Methods},

  number       = 2,

  volume       = 2,

  place        = {United States},

  year         = {Wed Dec 20 00:00:00 EST 2017},

  month        = {Wed Dec 20 00:00:00 EST 2017}

}

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Title: Direct Observation of the Growth of Lithium Dendrites on Graphite Anodes by Operando EC‐AFM

Abstract

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