SnO2-graphene-carbon nanotube mixture for anode material with improved rate capacities

Biao Zhang, Qing Bin Zheng, Zhen Dong Huang, Sei Woon Oh, Jang Kyo Kim

Research output: Journal article publicationJournal articleAcademic researchpeer-review

181 Citations (Scopus)

Abstract

SnO2-graphene-carbon nanotube (SnO2-G-CNT) mixture is synthesized using graphene oxide as precursor for application as anode material in rechargeable Li ion batteries. It is shown that the SnO2nanoparticles of 3-6 nm in diameter are not only attached onto the surface of graphene sheets by anchoring with surface functional groups, but they also are encapsulated in pore channels formed by entangled graphene sheets. The incorporation of carbon nanotubes reduces the charge transfer resistance of the anode made from the mixture through the formation of 3D electronic conductive networks. The SnO2-G-CNT anodes deliver remarkable capacities of 345 and 635 mAh g-1at 1.5 and 0.25 A g-1, respectively. Flexible electrodes consisting of highly-aligned SnO2-G-CNT papers are also prepared using a simple vacuum filtration technique. They present a stable capacity of 387 mAh g-1at 0.1 A g-1after 50 cycles through the synergy of the high specific capacity of SnO2nanoparticles and the excellent cycleability of G-CNT paper.
Original languageEnglish
Pages (from-to)4524-4534
Number of pages11
JournalCarbon
Volume49
Issue number13
DOIs
Publication statusPublished - 1 Nov 2011
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)

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