Surface-engineered mesoporous silicon microparticles as high-Coulombic-efficiency anodes for lithium-ion batteries

Wang, Jiangyan; Liao, Lei; Lee, Hye Ryoung; Shi, Feifei; Huang, William; Zhao, Jie; Pei, Allen; Tang, Jing; Zheng, Xueli; Chen, Wei; Cui, Yi

doi:10.1016/j.nanoen.2019.04.070

Title: Surface-engineered mesoporous silicon microparticles as high-Coulombic-efficiency anodes for lithium-ion batteries

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Abstract

High-capacity silicon anodes suffer from rapid capacity decay due to large volume expansion, which causes mechanical fracture, electrical contact loss and unstable solid electrolyte interphase (SEI). Nanostructuring has proved to be effective in addressing these problems over the past decade; however, new issues such as poor initial Coulombic efficiencies due to increased surface area remain unsolved. Here we develop a surface-engineering strategy by depositing a dense silicon skin onto each mesoporous silicon microparticle and further encapsulating it with a conformal graphene cage, which improves both the initial and later-cycle Coulombic efficiencies. The silicon skin lowers the unfavorable electrolyte/electrode contact area and minimizes SEI formation, resulting in an initial Coulombic efficiency over twice as high as that without silicon skin coating. Furthermore, the graphene cage combined with the inner void space of mesoporous silicon allow for silicon expansion, which guarantees structural integrity and SEI stability, resulting in high later-cycle Coulombic efficiencies (99.8–100% for later cycles) and impressive cycling stability.

Authors:

Wang, Jiangyan ^[1]; Liao, Lei ^[1]; Lee, Hye Ryoung ^[1]; Shi, Feifei ^[1]; Huang, William ^[1]; Zhao, Jie ^[1]; Pei, Allen ^[1]; Tang, Jing ^[1]; Zheng, Xueli ^[1]; Chen, Wei ^[1]; Cui, Yi ^[2]

Stanford Univ., Stanford, CA (United States)
Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)

Publication Date:: Thu Apr 25 00:00:00 EDT 2019

Research Org.:: SLAC National Accelerator Lab., Menlo Park, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1532410

Alternate Identifier(s):: OSTI ID: 1780391

Grant/Contract Number:: AC02-76SF00515

Resource Type:: Accepted Manuscript

Journal Name:: Nano Energy

Additional Journal Information:: Journal Volume: 61; Journal Issue: C; Journal ID: ISSN 2211-2855

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 25 ENERGY STORAGE; Silicon anode; Surface-engineering; Mesoporous microparticle; Coulombic efficiency; Lithium-ion battery

Citation Formats


                    Wang, Jiangyan, Liao, Lei, Lee, Hye Ryoung, Shi, Feifei, Huang, William, Zhao, Jie, Pei, Allen, Tang, Jing, Zheng, Xueli, Chen, Wei, and Cui, Yi. Surface-engineered mesoporous silicon microparticles as high-Coulombic-efficiency anodes for lithium-ion batteries.  United States: N. p., 2019. 
Web.  doi:10.1016/j.nanoen.2019.04.070.

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                    Wang, Jiangyan, Liao, Lei, Lee, Hye Ryoung, Shi, Feifei, Huang, William, Zhao, Jie, Pei, Allen, Tang, Jing, Zheng, Xueli, Chen, Wei, & Cui, Yi. Surface-engineered mesoporous silicon microparticles as high-Coulombic-efficiency anodes for lithium-ion batteries.  United States.  https://doi.org/10.1016/j.nanoen.2019.04.070

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                    Wang, Jiangyan, Liao, Lei, Lee, Hye Ryoung, Shi, Feifei, Huang, William, Zhao, Jie, Pei, Allen, Tang, Jing, Zheng, Xueli, Chen, Wei, and Cui, Yi. Thu .  
"Surface-engineered mesoporous silicon microparticles as high-Coulombic-efficiency anodes for lithium-ion batteries".  United States.  https://doi.org/10.1016/j.nanoen.2019.04.070.  https://www.osti.gov/servlets/purl/1532410.

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@article{osti_1532410,

  title        = {Surface-engineered mesoporous silicon microparticles as high-Coulombic-efficiency anodes for lithium-ion batteries},

  author       = {Wang, Jiangyan and Liao, Lei and Lee, Hye Ryoung and Shi, Feifei and Huang, William and Zhao, Jie and Pei, Allen and Tang, Jing and Zheng, Xueli and Chen, Wei and Cui, Yi},

  abstractNote = {High-capacity silicon anodes suffer from rapid capacity decay due to large volume expansion, which causes mechanical fracture, electrical contact loss and unstable solid electrolyte interphase (SEI). Nanostructuring has proved to be effective in addressing these problems over the past decade; however, new issues such as poor initial Coulombic efficiencies due to increased surface area remain unsolved. Here we develop a surface-engineering strategy by depositing a dense silicon skin onto each mesoporous silicon microparticle and further encapsulating it with a conformal graphene cage, which improves both the initial and later-cycle Coulombic efficiencies. The silicon skin lowers the unfavorable electrolyte/electrode contact area and minimizes SEI formation, resulting in an initial Coulombic efficiency over twice as high as that without silicon skin coating. Furthermore, the graphene cage combined with the inner void space of mesoporous silicon allow for silicon expansion, which guarantees structural integrity and SEI stability, resulting in high later-cycle Coulombic efficiencies (99.8–100% for later cycles) and impressive cycling stability.},

  doi          = {10.1016/j.nanoen.2019.04.070},

  journal      = {Nano Energy},

  number       = C,

  volume       = 61,

  place        = {United States},

  year         = {Thu Apr 25 00:00:00 EDT 2019},

  month        = {Thu Apr 25 00:00:00 EDT 2019}

}

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