화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Clean Technology, Vol.14, No.3, 171-175, September, 2008
Export Citation
스피넬형 Li4Ti5O12 음극물질의 Al3+ 첨가에 의한 전기화학적 성능 변화
Effect of Al3+ Dopant on the Electrochemical Characteristics of Spinel-type Li4Ti5O12
정충훈, 이의경, 방종민, 이봉희, 조병원1, 나병기†
  • 충북대학교 화학공학부, 361-763 충북 청주시 흥덕구 개신동 12
  • 1한국과학기술연구원 이차전지연구센터, 136-791 서울 성북구 하월곡동 39-1
Choong-Hoon Jeong, Eui-Kyung Lee, Jong-Min Bang, Bong-Hee Lee, Byung-Won Cho1, and Byung-Ki Na†
  • School of Chemical Engineering, Chungbuk National University, 12 Gaesin-dong, Heungduk-gu, Chungbuk 361-763, Korea
  • 1Battery Research Center, Korea Institute of Science and Technology, 39-1 Hawolgok-dong, Seongbuk-gu, Seoul 136-791, Korea
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초록
본 연구에서는 첨가물이 전기화학적 성능에 미치는 효과를 알아보기 위해 실험변수로서 첨가물 Al3+를 사용하였다. Zero-strain 삽입 혼합물로 알려진 Li4Ti5O12에 Al3+가 첨가된 Li3.95Al0.15Ti4.9O12를 high energy ball milling (HEBM)을 사용하여 고상반응으로 제조한 후에, 800, 900, 1000℃에서 열처리하여 시료를 제조하였다. 합성물질의 구조적 특성과 입자의 표면분석을 하기 위해 XRD (X-ray diffraction)와 SEM (scanning electron microscopy)을 사용하였으며, 이때의 입자의 분포는 대략 0.2~0.6 μm 정도로 측정되었다. 충/방전 실험은 1.0 ~ 3.0 V에서 하였으며, 가역용량, 사이클 안정성, 평탄 전압 등을 알아보았다. Li3.95Al0.15Ti4.9O12의 충방전 용량은 138 mAh/g이었다.
The effect of the addition of Al3+ dopant on the electrochemical characteristics of Li4Ti5O12 was investigated. Li4Ti5O12 is known as a zero-strain material, and Li3.95Al0.15Ti4.9O12 has been manufactured by solid-state reaction with high energy ball milling (HEBM). The samples were heated at 800, 900 and 1000℃ in electric furnace. The structural and surface structures were measured by XRD (X-ray diffraction) and SEM (scanning electron microscopy). Cut-off voltage of charge/discharge cycles was 1.0~ 3.0 V to investigate reversible capacity, cycle stability and plateau voltage. The reversible capacity of Li3.95Al0.15Ti4.9O12 was 138 mAh/g.
Keywords:Lithium ion battery;Anode material;Li4Ti5O12;Al3+ dopant
  1. Majima M, Ujiie S, Yagasaki E, Koyama K, Inazawa S, J. Power Sources, 101(1), 53 (2001)
  2. Huang SH, Wen ZY, Zhu XJ, Gu ZH, Electrochem. Commun., 6, 1093 (2003)
  3. Ohzuku T, Ueda A, Yamamoto N, Iwakoshi Y, J.Power Sources, 54, 99 (1995)
  4. Scharner S, Weppner W, Schmid-Beurmann P, J. Electrochem. Soc., 146(3), 857 (1999)
  5. Huang SH, Wen ZY, Zhu XJ, Yang XL, J. Electrochem. Soc., 152(7), A1301 (2005)
  6. Nakahara K, Nakajima R, Matsushima T, Majima H, J. Power Sources, 117(1-2), 131 (2003)
  7. Hasegawa K, Arakawa Y, J. Power Sources, 44, 523 (1993)
  8. Belharouak I, Amine K, Electrochem. Commun., 5, 435 (2003)
  9. Ohzuku T, Ueda A, Yamamoto N, J. Electrochem. Soc., 142(5), 1431 (1995)
  10. Ferg E, Gummow RJ, Dekock A, Thackeray MM, J. Electrochem. Soc., 141(11), L147 (1994)
  11. Huang SH, Wen ZY, Zhu XJ, Lin ZX, J. Electrochem. Soc., 152(1), A186 (2005)
  12. Zhao H, Li Y, Lin J, Tian Z, Qiu W, "Structural and Electrochemical Characteristics of Li4.xAlxTi5O12 As Anode Material for Lithium Ion Batteries," Electrochimica Acta, In Press, Accepted Manuscript, Available online 23 May 2008
  13. Huang SH, Wen ZY, Zhu XJ, Lin ZX, J. Power Sources, 165(1), 408 (2007)