Evolution of Solid Electrolyte Interface on TiO2 Electrodes in an Aqueous Li-Ion Battery Studied Using Scanning Electrochemical Microscopy

Liu, Dongqing; Yu, Qipeng; Liu, Shuai; Qian, Kun; Wang, Shuwei; Sun, Wei; Yang, Xiao -Qing; Kang, Feiyu; Li, Baohua

doi:10.1021/acs.jpcc.9b01412

Title: Evolution of Solid Electrolyte Interface on TiO₂ Electrodes in an Aqueous Li-Ion Battery Studied Using Scanning Electrochemical Microscopy

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Abstract

Scanning electrochemical microscopy (SECM) was applied for in situ visualization of solid electrolyte interface (SEI) evolution on the TiO₂ anode in a concentrated aqueous electrolyte during cycling. In nonaqueous electrolytes, the SEI is an electronic insulative layer composed of organic and inorganic components covering the electrode surface. However, in concentrated aqueous electrolytes, the SEI is mostly composed of inorganic compounds formed by electrolyte decomposition, such as LiF and Li₂CO₃, which are randomly distributed over the TiO₂ surface. In addition, the Ti³⁺ and Li residuals accumulated through multiple cycling lead to an increase in the overall electronic conductivity of the TiO₂ anode. Furthermore during the resting period after cycling, an inverse process is observed with partial dissolution of the formed SEI and the diffusion of Li residuals back into the electrolyte.

Authors:

Liu, Dongqing ^[1]; Yu, Qipeng ^[2]; Liu, Shuai ^[2];

^[3]; Wang, Shuwei ^[2]; Sun, Wei ^[4];

^[5]; Kang, Feiyu ^[3];

^[6]

Tsinghua Univ., Shenzhen (China); Sunwoda Electronic Company Ltd., Shenzhen (China)
Tsinghua Univ., Shenzhen (China); Tsinghua Univ., Beijing (China)
Tsinghua Univ., Shenzhen (China); Tsinghua Univ., Beijing (China); Tsinghua-Berkeley Shenzhen Inst., Shenzhen (China)
Sunwoda Electronic Company Ltd., Shenzhen (China)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Tsinghua Univ., Shenzhen (China)

Publication Date:: Wed May 01 00:00:00 EDT 2019

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

OSTI Identifier:: 1514711

Report Number(s):: BNL-211615-2019-JAAM
Journal ID: ISSN 1932-7447

Grant/Contract Number:: SC0012704

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Physical Chemistry. C

Additional Journal Information:: Journal Volume: 123; Journal Issue: 20; Journal ID: ISSN 1932-7447

Publisher:: American Chemical Society

Country of Publication:: United States

Language:: English

Subject:: 25 ENERGY STORAGE

Citation Formats


                    Liu, Dongqing, Yu, Qipeng, Liu, Shuai, Qian, Kun, Wang, Shuwei, Sun, Wei, Yang, Xiao -Qing, Kang, Feiyu, and Li, Baohua. Evolution of Solid Electrolyte Interface on TiO2 Electrodes in an Aqueous Li-Ion Battery Studied Using Scanning Electrochemical Microscopy.  United States: N. p., 2019. 
Web.  doi:10.1021/acs.jpcc.9b01412.

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                    Liu, Dongqing, Yu, Qipeng, Liu, Shuai, Qian, Kun, Wang, Shuwei, Sun, Wei, Yang, Xiao -Qing, Kang, Feiyu, & Li, Baohua. Evolution of Solid Electrolyte Interface on TiO2 Electrodes in an Aqueous Li-Ion Battery Studied Using Scanning Electrochemical Microscopy.  United States.  https://doi.org/10.1021/acs.jpcc.9b01412

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                    Liu, Dongqing, Yu, Qipeng, Liu, Shuai, Qian, Kun, Wang, Shuwei, Sun, Wei, Yang, Xiao -Qing, Kang, Feiyu, and Li, Baohua. Wed .  
"Evolution of Solid Electrolyte Interface on TiO2 Electrodes in an Aqueous Li-Ion Battery Studied Using Scanning Electrochemical Microscopy".  United States.  https://doi.org/10.1021/acs.jpcc.9b01412.  https://www.osti.gov/servlets/purl/1514711.

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@article{osti_1514711,

  title        = {Evolution of Solid Electrolyte Interface on TiO2 Electrodes in an Aqueous Li-Ion Battery Studied Using Scanning Electrochemical Microscopy},

  author       = {Liu, Dongqing and Yu, Qipeng and Liu, Shuai and Qian, Kun and Wang, Shuwei and Sun, Wei and Yang, Xiao -Qing and Kang, Feiyu and Li, Baohua},

  abstractNote = {Scanning electrochemical microscopy (SECM) was applied for in situ visualization of solid electrolyte interface (SEI) evolution on the TiO2 anode in a concentrated aqueous electrolyte during cycling. In nonaqueous electrolytes, the SEI is an electronic insulative layer composed of organic and inorganic components covering the electrode surface. However, in concentrated aqueous electrolytes, the SEI is mostly composed of inorganic compounds formed by electrolyte decomposition, such as LiF and Li2CO3, which are randomly distributed over the TiO2 surface. In addition, the Ti3+ and Li residuals accumulated through multiple cycling lead to an increase in the overall electronic conductivity of the TiO2 anode. Furthermore during the resting period after cycling, an inverse process is observed with partial dissolution of the formed SEI and the diffusion of Li residuals back into the electrolyte.},

  doi          = {10.1021/acs.jpcc.9b01412},

  journal      = {Journal of Physical Chemistry. C},

  number       = 20,

  volume       = 123,

  place        = {United States},

  year         = {Wed May 01 00:00:00 EDT 2019},

  month        = {Wed May 01 00:00:00 EDT 2019}

}

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Title: Evolution of Solid Electrolyte Interface on TiO2 Electrodes in an Aqueous Li-Ion Battery Studied Using Scanning Electrochemical Microscopy

Abstract

Citation Formats

Title: Evolution of Solid Electrolyte Interface on TiO₂ Electrodes in an Aqueous Li-Ion Battery Studied Using Scanning Electrochemical Microscopy