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Hierarchically Bicontinuous Porous Copper as Advanced 3D Skeleton for Stable Lithium Storage

Journal Article


Abstract


  • Rechargeable lithium metal anodes (LMAs) with long cycling life have been regarded as the "Holy Grail" for high-energy-density lithium metal secondary batteries. The skeleton plays an important role in determining the performance of LMAs. Commercially available copper foam (CF) is not normally regarded as a suitable skeleton for stable lithium storage owing to its relatively inappropriate large pore size and relatively low specific surface area. Herein, for the first time, we revisit CF and address these issues by rationally designing a highly porous copper (HPC) architecture grown on CF substrates (HPC/CF) as a three-dimensional (3D) hierarchically bicontinuous porous skeleton through a novel approach combining the self-assembly of polystyrene microspheres, electrodeposition of copper, and a thermal annealing treatment. Compared to the CF skeleton, the HPC/CF skeleton exhibits a significantly improved Li plating/stripping behavior with high Coulombic efficiency (CE) and superior Li dendrite growth suppression. The 3D HPC/CF-based LMAs can run for 620 h without short-circuiting in a symmetric Li/Li@Cu cell at 0.5 mA cm -2 , and the Li@Cu/LiFePO 4 full cell exhibits a high reversible capacity of 115 mAh g -1 with a high CE of 99.7% at 2 C for 500 cycles. These results demonstrate the effectiveness of the design strategy of 3D hierarchically bicontinuous porous skeletons for developing stable and safe LMAs.

Authors


  •   Ke, Xi (external author)
  •   Cheng, Yifeng (external author)
  •   Liu, Jun (external author)
  •   Liu, Liying (external author)
  •   Wang, Naiguang (external author)
  •   Liu, Jianping (external author)
  •   Zhi, Chunyi (external author)
  •   Shi, Zhicong (external author)
  •   Guo, Zaiping

Publication Date


  • 2018

Citation


  • Ke, X., Cheng, Y., Liu, J., Liu, L., Wang, N., Liu, J., Zhi, C., Shi, Z. & Guo, Z. (2018). Hierarchically Bicontinuous Porous Copper as Advanced 3D Skeleton for Stable Lithium Storage. ACS Applied Materials and Interfaces, 10 (16), 13552-13561.

Scopus Eid


  • 2-s2.0-85045922949

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3091

Number Of Pages


  • 9

Start Page


  • 13552

End Page


  • 13561

Volume


  • 10

Issue


  • 16

Place Of Publication


  • United States

Abstract


  • Rechargeable lithium metal anodes (LMAs) with long cycling life have been regarded as the "Holy Grail" for high-energy-density lithium metal secondary batteries. The skeleton plays an important role in determining the performance of LMAs. Commercially available copper foam (CF) is not normally regarded as a suitable skeleton for stable lithium storage owing to its relatively inappropriate large pore size and relatively low specific surface area. Herein, for the first time, we revisit CF and address these issues by rationally designing a highly porous copper (HPC) architecture grown on CF substrates (HPC/CF) as a three-dimensional (3D) hierarchically bicontinuous porous skeleton through a novel approach combining the self-assembly of polystyrene microspheres, electrodeposition of copper, and a thermal annealing treatment. Compared to the CF skeleton, the HPC/CF skeleton exhibits a significantly improved Li plating/stripping behavior with high Coulombic efficiency (CE) and superior Li dendrite growth suppression. The 3D HPC/CF-based LMAs can run for 620 h without short-circuiting in a symmetric Li/Li@Cu cell at 0.5 mA cm -2 , and the Li@Cu/LiFePO 4 full cell exhibits a high reversible capacity of 115 mAh g -1 with a high CE of 99.7% at 2 C for 500 cycles. These results demonstrate the effectiveness of the design strategy of 3D hierarchically bicontinuous porous skeletons for developing stable and safe LMAs.

Authors


  •   Ke, Xi (external author)
  •   Cheng, Yifeng (external author)
  •   Liu, Jun (external author)
  •   Liu, Liying (external author)
  •   Wang, Naiguang (external author)
  •   Liu, Jianping (external author)
  •   Zhi, Chunyi (external author)
  •   Shi, Zhicong (external author)
  •   Guo, Zaiping

Publication Date


  • 2018

Citation


  • Ke, X., Cheng, Y., Liu, J., Liu, L., Wang, N., Liu, J., Zhi, C., Shi, Z. & Guo, Z. (2018). Hierarchically Bicontinuous Porous Copper as Advanced 3D Skeleton for Stable Lithium Storage. ACS Applied Materials and Interfaces, 10 (16), 13552-13561.

Scopus Eid


  • 2-s2.0-85045922949

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3091

Number Of Pages


  • 9

Start Page


  • 13552

End Page


  • 13561

Volume


  • 10

Issue


  • 16

Place Of Publication


  • United States