한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제41권8호
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  • Pages.593-598
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  • 2004
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  • 1229-7801(pISSN)
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  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
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전고상 리튬 박막 전지 구현을 위해 펄스 레이저 증착법으로 LiCoO2 정극위에 성장시킨 비정질 (Li, La)TiO3고체 전해질의 특성

Amorphous Lithium Lanthanum Titanate Solid Electrolyte Grown on LiCoO2 Cathode by Pulsed Laser Deposition for All-Solid-State Lithium Thin Film Microbattery

  • 발행 : 2004.08.01
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초록

1 $\mu$m이하의 전고상 리튬 박막전지의 구현을 위해 펄스 레이저 증착법을 이용하여 Pt/TiO$_2$/SiO$_2$/Si 기판위에 LiCoO$_2$정극을 증착온도와 Li/Co 간의 몰 비율을 변화시켜가며 성장시켰다. 특히, Li/Co=1.2의 조성을 갖는 LiCoO$_2$를 50$0^{\circ}C$의 증착온도에서 성장시킬 경우 53 $\mu$Ah/$cm^2$-$\mu$m의 높은 초기 용량값을 가지며 100 싸이클 후에도 67.6%의 용량값을 유지하였다. LiCoO$_2$/Pt/TiO$_2$/SiO$_2$/Si위에 고체 전해질인 (Li, La)TiO$_3$를 비정질상으로 하여 PLD방법으로 낮은 온도대역에서 증착온도를 다양하게 하여 증착하였다. 10$0^{\circ}C$의 증착온도에서 LiCoO$_2$Pt/TiO$_2$/SiO$_2$/Si위에 성장시킨 (Li, La)TiO를 가지고 LiClO$_4$ in PC 안에서 Li anode와 충$.$방전 측정 결과 약 51$\mu$Ah/$cm^2$-$\mu$m의 초기 용량값을 나타내었으며 100싸이클 후에도 90%의 훌륭한 방전용량의 보존력을 나타내었다. 비정질상의 (Li, La)TiO$_3$ 고체 전해질은 전고상 박막전지로의 구현이 가능하다.

To make the all-solid-state lithium thin film battery having less than 1 fm in thickness, LiCoO$_2$ thin films were deposited on Pt/TiO$_2$/SiO$_2$/Si substrate as a function of Li/Co mole ratio and the deposition temperature by Pulsed Laser Deposition (PLD). Especially, LiCoO$_2$ thin films deposited at 50$0^{\circ}C$ with target of Li/Co=1.2 mole ratio show an initial discharge capacity of 53 $\mu$Ah/cm$^2$-$\mu$m and capacity retention of 67.6％. The microstructural and electrochemical properies of (Li, La)TiO3 thin films grown on LiCoO$_2$Pt/TiO$_2$/SiO$_2$/Si structures by Pulsed Laser Deposition (PLD) were investigated at various deposition temperatures. The thin films grown at 10$0^{\circ}C$ show an initial discharge capacity of approximately 51 $\mu$Ah/cm$^2$-$\mu$m and moreover show excellent discharge capacity retention of 90％ after 100 cycles. An amorphous (Li, La)TiO$_3$ solid electrolyte is possible for application to solid electrolyte for all-solid-state lithium thin film battery below 1 $\mu$m.

키워드

참고문헌

  1. J. Kor. Elecrochem. Soc. v.6 no.4 LiCoO$_2$ Thin Film Deposited by Bias Sputtering Method 1. Electrochemical Characteristics (in Kor.) Y. J. Lee;H. Y. Park;W. I. Cho;B. W Cho;K. B. Kim https://doi.org/10.5229/JKES.2003.6.4.261
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  3. Solid State Ionics v.158 no.92 Structural and Electrochemical Properties of LiCoO$_2$ Prepared by Combustion Synthesis E. I. Santiago;A. V. C. Andrade;C. O. Paiva-Santos;L. O. S. Bulhoes https://doi.org/10.1016/S0167-2738(02)00765-8
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  6. J. Power Sources v.125 Composite Polymer Electrolytes Reinforced by Non-Woven Fabrics M.-K. Song;Y-T. Kim;J.-Y Cho;B. W. Cho;B. N. Popov;H.-W. Rhee https://doi.org/10.1016/S0378-7753(03)00826-7
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피인용 문헌

  1. 3D Structure of Electrode with Inorganic Solid Electrolyte vol.159, pp.8, 2012, https://doi.org/10.1149/2.072208jes