화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Materials Research, Vol.18, No.9, 457-462, September, 2008
DOI10.3740/MRSK.2008.18.9.457  Export Citation
Heterocoagulation 법으로 제조된 이차전지용 MWNT/SnO2 나노복합음극재의 전기화학적 특성
Preparation and Characteristics of MWNT/SnO2 Nanocomposites Anode by Colloidal Heterocoagulation for Li-ion Battery
한원규, 홍석준, 황길호, 좌용호1, 오승탁2, 조진기3, 강성군†
  • 한양대학교 신소재공학부
  • 1한양대학교 정밀화학공학과
  • 2서울산업대학교 신소재공학과
  • 3한국 산업기술 대학교 신소재 공학부
Won-Kyu Han, Seok-Jun Hong, Gil-Ho Hwang, Yong-Ho Choa1, Sung-Tag Oh2, Jin-Ki Cho3, and Sung-Goon Kang†
  • Division of Materials Science and Engineering, Hanyang University, Seoul 133-791, South Korea
  • 1Department of Fine Chemical Engineering,, Hanyang University, Ansan 426-791, Korea
  • 2Department of Materials Science and Engineering, Seoul National University of Technology, Seoul 139-743, Korea
  • 3Department of advanced materials Engineering, Korea Polytechnic University, 2121 Siheung, Kyonggi-do, krea, Korea
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Through the electrostatic interaction between the poly-diallydimethylammonium chloride (PDDA) modified Multi-walled carbon nanotube (MWNT) and SnO2 suspension in 1mM NaNo3 solution, MWNT-SnO2 nanocomposites (MSC) for anode electrodes of a Li-ion battery were successfully fabricated by colloidal heterocoagulation method. TEM observation showed that most of the SnO2 nanoparticles were uniformly deposited on the outside surface of the MWNT. Galvanostatic charge/ discharge cycling tests showed that MSC anodes exhibited higher specific capacities than bare MWNT and better cyclability than unsupported nano-SnO2 anodes. Also, after 20 cycles, the MSC anode fabricated by heterocoagulation method showed more stable cycle properties than the simply mixed MSC anode. These improved electrochemical properties are attributed to the MWNT, which adsorbs the mechanical stress induced from volume change and increasing electrical conductivity of the MSC anode, and suppresses the aggregation between the SnO2 nanoparticles.
Keywords:Heterocoagulation;Battery;Anode;SnO2;Multi-walled carbon nanotube (MWNT)
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