Vertically aligned ultrathin MoS2 nanosheets grown on graphene-wrapped hollow carbon microtubes derived from loofah sponge as advanced anodes for highly reversible lithium storage

Yan Guo, Yingge Zhang, Yange Wang, Deyang Zhang, Yang Lu, Rongjie Luo, Yangbo Wang, Xianming Liu, Jang Kyo Kim, Yongsong Luo

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

Using low cost, environment-friendly, and sustainable biomass is a unique approach to the preparation carbon-based composites for lithium ion batteries. In our research, hollow, derived microtubes (HMD) were fabricated from graphene/loofah sponge. Each microtube was wrapped with graphene, resulting in conductivity improvement, and facilitated easily controlled growth of ultra-thin MoS2 nanosheets. The method employed a simple process of soaking the HMD in graphene oxide (GO) dispersion liquid, and subsequent carbonization and activation of the HMD/rGO. When ultrathin MoS2 nanosheets were vertically and uniformly grown on the surface of the HMD/rGO, via the hydrothermal method, the HMD/rGO/MoS2 composite was obtained, and exhibited reversible lithium storage capacity of 838.2 mAh g−1 at a current density of 0.2 A g−1 after 200 cycles. This excellent electrochemical performance could be due to the high conductivity of HMD/rGO, a synergistic effect between HMD/rGO and MoS2 nanosheets, a reasonable structural design, and the high theoretical specific capacity of MoS2. Such a structure not only provides a novel, high-quality carbon template/matrix from cheap loofah sponge, but also provides a new way to design sustainable electrodes for electrochemical energy storage, and makes economical, multifunctional, carbon-based hybrids available for other applications.

Original languageBritish English
Pages (from-to)989-998
Number of pages10
JournalElectrochimica Acta
Volume296
DOIs
StatePublished - 10 Feb 2019

Keywords

  • Biomass hollow microtubes
  • Graphene
  • Lithium-ion batteries
  • Loofah sponge
  • MoS nanosheets

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