Structural integrity—Searching the key factor to suppress the voltage fade of Li-rich layered cathode materials through 3D X-ray imaging and spectroscopy techniques

Xu, Yahong; Hu, Enyuan; Yang, Feifei; Corbett, Jeff; Sun, Zhihong; Lyu, Yingchun; Yu, Xiqian; Liu, Yijin; Yang, Xiao-Qing; Li, Hong

doi:10.1016/j.nanoen.2016.08.039

Title: Structural integrity—Searching the key factor to suppress the voltage fade of Li-rich layered cathode materials through 3D X-ray imaging and spectroscopy techniques

Abstract

Li-rich layered materials are important cathode compounds used in commercial lithium ion batteries, which, however, suffers from some drawbacks including the so-called voltage fade upon electrochemical cycling. This study employs novel transmission X-ray microscopy to investigate the electrochemical reaction induced morphological and chemical changes in the Li-rich Li₂Ru_0.5Mn_0.5O₃ cathode particles at the meso to nano scale. Combined X-ray spectroscopy, diffraction and microscopy experiments are performed to systematically study this cathode material's evolution upon cycling as well as to establish a comprehensive understanding of the structural origin of capacity fade through 2D and 3D fine length scale morphology and heterogeneity change of this material. This work suggests that atomic manipulation (e.g. doping, substitution etc.) or nano engineering (e.g. nano-sizing, heterogeneous structure) are important strategies to mitigate the internal strain and defects induced by extensive lithium insertion/extraction. In conclusion, it also shows that maintaining the structural integrity is the key in designing and synthesizing lithium-rich layered materials with better cycle stability.

Authors:: Xu, Yahong; Hu, Enyuan; Yang, Feifei; Corbett, Jeff; Sun, Zhihong; Lyu, Yingchun; Yu, Xiqian; Liu, Yijin; Yang, Xiao-Qing; Li, Hong

Publication Date:: Sat Oct 01 00:00:00 EDT 2016

Research Org.:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)

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

OSTI Identifier:: 1310829

Alternate Identifier(s):: OSTI ID: 1311766; OSTI ID: 1326739

Report Number(s):: BNL-112630-2016-JA
Journal ID: ISSN 2211-2855; S2211285516303275; PII: S2211285516303275

Grant/Contract Number:: SC0012704; AC02-76SF00515; AC02-06CH11357; 51325206; SC00112704

Resource Type:: Published Article

Journal Name:: Nano Energy

Additional Journal Information:: Journal Name: Nano Energy Journal Volume: 28 Journal Issue: C; Journal ID: ISSN 2211-2855

Publisher:: Elsevier

Country of Publication:: Netherlands

Language:: English

Subject:: 25 ENERGY STORAGE; lithium-ion batteries; cathode; lithium rich layered oxides; voltage fade; transmission X-ray microscopy

Citation Formats


                    Xu, Yahong, Hu, Enyuan, Yang, Feifei, Corbett, Jeff, Sun, Zhihong, Lyu, Yingchun, Yu, Xiqian, Liu, Yijin, Yang, Xiao-Qing, and Li, Hong. Structural integrity—Searching the key factor to suppress the voltage fade of Li-rich layered cathode materials through 3D X-ray imaging and spectroscopy techniques.  Netherlands: N. p., 2016. 
Web.  doi:10.1016/j.nanoen.2016.08.039.

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                    Xu, Yahong, Hu, Enyuan, Yang, Feifei, Corbett, Jeff, Sun, Zhihong, Lyu, Yingchun, Yu, Xiqian, Liu, Yijin, Yang, Xiao-Qing, & Li, Hong. Structural integrity—Searching the key factor to suppress the voltage fade of Li-rich layered cathode materials through 3D X-ray imaging and spectroscopy techniques.  Netherlands.  https://doi.org/10.1016/j.nanoen.2016.08.039

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                    Xu, Yahong, Hu, Enyuan, Yang, Feifei, Corbett, Jeff, Sun, Zhihong, Lyu, Yingchun, Yu, Xiqian, Liu, Yijin, Yang, Xiao-Qing, and Li, Hong. Sat .  
"Structural integrity—Searching the key factor to suppress the voltage fade of Li-rich layered cathode materials through 3D X-ray imaging and spectroscopy techniques".  Netherlands.  https://doi.org/10.1016/j.nanoen.2016.08.039.

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@article{osti_1310829,

  title        = {Structural integrity—Searching the key factor to suppress the voltage fade of Li-rich layered cathode materials through 3D X-ray imaging and spectroscopy techniques},

  author       = {Xu, Yahong and Hu, Enyuan and Yang, Feifei and Corbett, Jeff and Sun, Zhihong and Lyu, Yingchun and Yu, Xiqian and Liu, Yijin and Yang, Xiao-Qing and Li, Hong},

  abstractNote = {Li-rich layered materials are important cathode compounds used in commercial lithium ion batteries, which, however, suffers from some drawbacks including the so-called voltage fade upon electrochemical cycling. This study employs novel transmission X-ray microscopy to investigate the electrochemical reaction induced morphological and chemical changes in the Li-rich Li2Ru0.5Mn0.5O3 cathode particles at the meso to nano scale. Combined X-ray spectroscopy, diffraction and microscopy experiments are performed to systematically study this cathode material's evolution upon cycling as well as to establish a comprehensive understanding of the structural origin of capacity fade through 2D and 3D fine length scale morphology and heterogeneity change of this material. This work suggests that atomic manipulation (e.g. doping, substitution etc.) or nano engineering (e.g. nano-sizing, heterogeneous structure) are important strategies to mitigate the internal strain and defects induced by extensive lithium insertion/extraction. In conclusion, it also shows that maintaining the structural integrity is the key in designing and synthesizing lithium-rich layered materials with better cycle stability.},

  doi          = {10.1016/j.nanoen.2016.08.039},

  journal      = {Nano Energy},

  number       = C,

  volume       = 28,

  place        = {Netherlands},

  year         = {Sat Oct 01 00:00:00 EDT 2016},

  month        = {Sat Oct 01 00:00:00 EDT 2016}

}

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Title: Structural integrity—Searching the key factor to suppress the voltage fade of Li-rich layered cathode materials through 3D X-ray imaging and spectroscopy techniques

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