High-level heteroatom doped two-dimensional carbon architectures for highly efficient lithium-ion storage

Zhijie Wang, Yanyan Wang, Wenhui Wang, Xiaoliang Yu, Wei Lv, Bin Xiang, Yan Bing He

Research output: Journal article publicationJournal articleAcademic researchpeer-review

17 Citations (Scopus)

Abstract

In this work, high-level heteroatom doped two-dimensional hierarchical carbon architectures (H-2D-HCA) are developed for highly efficient Li-ion storage applications. The achieved H-2D-HCA possesses a hierarchical 2D morphology consisting of tiny carbon nanosheets vertically grown on carbon nanoplates and containing a hierarchical porosity with multiscale pore size. More importantly, the H-2D-HCA shows abundant heteroatom functionality, with sulfur (S) doping of 0.9% and nitrogen (N) doping of as high as 15.5%, in which the electrochemically active N accounts for 84% of total N heteroatoms. In addition, the H-2D-HCA also has an expanded interlayer distance of 0.368 nm. When used as lithium-ion battery anodes, it shows excellent Li-ion storage performance. Even at a high current density of 5 A g-1, it still delivers a high discharge capacity of 329 mA h g-1 after 1,000 cycles. First principle calculations verifies that such unique microstructure characteristics and high-level heteroatom doping nature can enhance Li adsorption stability, electronic conductivity and Li diffusion mobility of carbon nanomaterials. Therefore, the H-2D-HCA could be promising candidates for next-generation LIB anodes.

Original languageEnglish
Article number97
JournalFrontiers in Chemistry
Volume6
Issue numberAPR
DOIs
Publication statusPublished - 1 Apr 2018
Externally publishedYes

Keywords

  • 2D carbon nanomaterials
  • Hierarchical structure
  • High-level heteroatom doping
  • High-rate capability
  • Li-ion batteries

ASJC Scopus subject areas

  • Chemistry(all)

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