Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Preparation and Characteristics of MWNT/SnO2 Nano-Composite Anode by Homogeneous Precipitation Method

균일 침전법에 의한 MWNT/SnO2 나노복합음극재의 제조

  • Han, Won-Kyu (Division of Materials Science and Engineering, Hanyang University) ;
  • Choa, Yong-Ho (Department of Fine Chemical Engineering, Hanyang University) ;
  • Oh, Sung-Tag (Department of Materials Science and Engineering, Seoul National University of Technology) ;
  • Cho, Jin-Ki (Department of advanced materials Engineering, Korea Polytechnic University) ;
  • Kang, Sung-Goon (Division of Materials Science and Engineering, Hanyang University)
  • 한원규 (한양대학교 신소재공학부) ;
  • 좌용호 (한양대학교 정밀화학공학과) ;
  • 오승탁 (서울산업대학교 신소재공학과) ;
  • 조진기 (한국 산업기술 대학교 신소재 공학부) ;
  • 강성군 (한양대학교 신소재공학부)
  • Published : 2008.04.30
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Abstract

Multi-walled carbon nanotube (MWNT)/$SnO_2$ nano-composite (MSC) for the anode electrode of a Li-ion battery was prepared using a homogeneous precipitation method with $SnCl_2$ precursors in the presence of MWNT. XRD results indicate that when annealed in Ar at $400^{\circ}C$, $Sn_6O_4(OH)_4$ was fully converted to $SnO_2$ phases. TEM observations showed that most of the $SnO_2$ nanoparticles were deposited directly on the outside surface of the MWNT. The electrochemical performance of the MSC electrode showed higher specific capacities than a MWNT and better cycleability than a nano-$SnO_2$ electrode. The electrochemical performance of the MSC electrode improved because the MWNT in the MSC electrode absorbed the mechanical stress induced from a volume change during alloying and de-alloying reactions with lithium, leading to an increase in the electrical conductivity of the composite material.

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References

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