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Local Electric Field Facilitates High-Performance Li-Ion Batteries

Journal Article


Abstract


  • By scrutinizing the energy storage process in Li-ion batteries,

    tuning Li-ion migration behavior by atomic level tailoring will unlock great

    potential for pursuing higher electrochemical performance. Vacancy, which can

    effectively modulate the electrical ordering on the nanoscale, even in tiny

    concentrations, will provide tempting opportunities for manipulating Li-ion

    migratory behavior. Herein, taking CuGeO3 as a model, oxygen vacancies

    obtained by reducing the thickness dimension down to the atomic scale are

    introduced in this work. As the Li-ion storage progresses, the imbalanced charge

    distribution emerging around the oxygen vacancies could induce a local built-in

    electric field, which will accelerate the ions’ migration rate by Coulomb forces

    and thus have benefits for high-rate performance. Furthermore, the thusobtained

    CuGeO3 ultrathin nanosheets (CGOUNs)/graphene van der Waals

    heterojunctions are used as anodes in Li-ion batteries, which deliver a reversible

    specific capacity of 1295 mAh g−1 at 100 mA g−1

    , with improved rate capability

    and cycling performance compared to their bulk counterpart. Our findings build a clear connection between the atomic/

    defect/electronic structure and intrinsic properties for designing high-efficiency electrode materials.

Authors


  •   Liu, Youwen (external author)
  •   Zhou, Tengfei
  •   Zheng, Yang (external author)
  •   He, Zhihai (external author)
  •   Xiao, Chong (external author)
  •   Pang, Wei Kong.
  •   Tong, Wei (external author)
  •   Zou, Youming (external author)
  •   Pan, Bicai (external author)
  •   Guo, Zaiping
  •   Xie, Yi (external author)

Publication Date


  • 2017

Citation


  • Liu, Y., Zhou, T., Zheng, Y., He, Z., Xiao, C., Pang, W., Tong, W., Zou, Y., Pan, B., Guo, Z. & Xie, Y. (2017). Local Electric Field Facilitates High-Performance Li-Ion Batteries. ACS NANO, 11 (8), 8519-8526.

Scopus Eid


  • 2-s2.0-85028513374

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2725

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 8519

End Page


  • 8526

Volume


  • 11

Issue


  • 8

Place Of Publication


  • United States

Abstract


  • By scrutinizing the energy storage process in Li-ion batteries,

    tuning Li-ion migration behavior by atomic level tailoring will unlock great

    potential for pursuing higher electrochemical performance. Vacancy, which can

    effectively modulate the electrical ordering on the nanoscale, even in tiny

    concentrations, will provide tempting opportunities for manipulating Li-ion

    migratory behavior. Herein, taking CuGeO3 as a model, oxygen vacancies

    obtained by reducing the thickness dimension down to the atomic scale are

    introduced in this work. As the Li-ion storage progresses, the imbalanced charge

    distribution emerging around the oxygen vacancies could induce a local built-in

    electric field, which will accelerate the ions’ migration rate by Coulomb forces

    and thus have benefits for high-rate performance. Furthermore, the thusobtained

    CuGeO3 ultrathin nanosheets (CGOUNs)/graphene van der Waals

    heterojunctions are used as anodes in Li-ion batteries, which deliver a reversible

    specific capacity of 1295 mAh g−1 at 100 mA g−1

    , with improved rate capability

    and cycling performance compared to their bulk counterpart. Our findings build a clear connection between the atomic/

    defect/electronic structure and intrinsic properties for designing high-efficiency electrode materials.

Authors


  •   Liu, Youwen (external author)
  •   Zhou, Tengfei
  •   Zheng, Yang (external author)
  •   He, Zhihai (external author)
  •   Xiao, Chong (external author)
  •   Pang, Wei Kong.
  •   Tong, Wei (external author)
  •   Zou, Youming (external author)
  •   Pan, Bicai (external author)
  •   Guo, Zaiping
  •   Xie, Yi (external author)

Publication Date


  • 2017

Citation


  • Liu, Y., Zhou, T., Zheng, Y., He, Z., Xiao, C., Pang, W., Tong, W., Zou, Y., Pan, B., Guo, Z. & Xie, Y. (2017). Local Electric Field Facilitates High-Performance Li-Ion Batteries. ACS NANO, 11 (8), 8519-8526.

Scopus Eid


  • 2-s2.0-85028513374

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2725

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 8519

End Page


  • 8526

Volume


  • 11

Issue


  • 8

Place Of Publication


  • United States