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Curving effects of concave dodecahedral nanocarbons enable enhanced Li-ion storage

Journal Article


Abstract


  • Dodecahedral nanocarbons with highly curving concave faces are synthesized via a one-step direct pyrolysis strategy. When tested as anodes in lithium-ion batteries (LIBs), the concave dodecahedral carbons (CDCs) show much enhanced capacity (∼2 times) and improved rate capability (603 mA h g-1at 2000 mA g-1), when compared with the perfect ones without curved planes (PDCs, 280 mA h g-1). The curving effects of CDCs on Li ion storage are further investigated by constructing a CDC particle-based nanobattery device in an in situ transmission electron microscope (TEM). During the lithiation process of CDCs, the spacing in the curved parts expands much more than the perfect ones (from 0.5 nm to 0.7 nm), providing increasing active sites for Li ion storage. And the stable solid electrolyte interphase (SEI) layer and structural integrity for CDCs are also visualized during the discharge process, in good agreement with their ultralong cycle life. This design concept, enhancing curved parts in the structures, provides guidance in the development of next-generation advanced electrode materials.

Authors


  •   Liu, Huan (external author)
  •   Zhang, Yaru (external author)
  •   Dong, Jinyang (external author)
  •   Ye, Tao (external author)
  •   Hao, Jianmin (external author)
  •   Yang, Yijun (external author)
  •   Jiang, Xiangfen (external author)
  •   Kang, Xiaohong (external author)
  •   Bando, Yoshio
  •   Wang, Xi (external author)

Publication Date


  • 2018

Citation


  • Liu, H., Zhang, Y., Dong, J., Ye, T., Hao, J., Yang, Y., Jiang, X., Kang, X., Bando, Y. & Wang, X. (2018). Curving effects of concave dodecahedral nanocarbons enable enhanced Li-ion storage. Journal of Materials Chemistry A, 6 (30), 14894-14902.

Scopus Eid


  • 2-s2.0-85051000840

Number Of Pages


  • 8

Start Page


  • 14894

End Page


  • 14902

Volume


  • 6

Issue


  • 30

Place Of Publication


  • United Kingdom

Abstract


  • Dodecahedral nanocarbons with highly curving concave faces are synthesized via a one-step direct pyrolysis strategy. When tested as anodes in lithium-ion batteries (LIBs), the concave dodecahedral carbons (CDCs) show much enhanced capacity (∼2 times) and improved rate capability (603 mA h g-1at 2000 mA g-1), when compared with the perfect ones without curved planes (PDCs, 280 mA h g-1). The curving effects of CDCs on Li ion storage are further investigated by constructing a CDC particle-based nanobattery device in an in situ transmission electron microscope (TEM). During the lithiation process of CDCs, the spacing in the curved parts expands much more than the perfect ones (from 0.5 nm to 0.7 nm), providing increasing active sites for Li ion storage. And the stable solid electrolyte interphase (SEI) layer and structural integrity for CDCs are also visualized during the discharge process, in good agreement with their ultralong cycle life. This design concept, enhancing curved parts in the structures, provides guidance in the development of next-generation advanced electrode materials.

Authors


  •   Liu, Huan (external author)
  •   Zhang, Yaru (external author)
  •   Dong, Jinyang (external author)
  •   Ye, Tao (external author)
  •   Hao, Jianmin (external author)
  •   Yang, Yijun (external author)
  •   Jiang, Xiangfen (external author)
  •   Kang, Xiaohong (external author)
  •   Bando, Yoshio
  •   Wang, Xi (external author)

Publication Date


  • 2018

Citation


  • Liu, H., Zhang, Y., Dong, J., Ye, T., Hao, J., Yang, Y., Jiang, X., Kang, X., Bando, Y. & Wang, X. (2018). Curving effects of concave dodecahedral nanocarbons enable enhanced Li-ion storage. Journal of Materials Chemistry A, 6 (30), 14894-14902.

Scopus Eid


  • 2-s2.0-85051000840

Number Of Pages


  • 8

Start Page


  • 14894

End Page


  • 14902

Volume


  • 6

Issue


  • 30

Place Of Publication


  • United Kingdom