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Lithium Lanthanum Titanate Solid Electrolyte for All-Solid-State Lithium Microbattery

전고상박막전지를 위한 (Li,La)TiO3 고체전해질의 제조와 특성

  • Published : 2004.09.01

Abstract

$({Li}_{0.5}0{La}_{0.5}){TiO}_3$ (LLTO) solid electrolyte was grown on LiCo{O}_2 (LCO) cathode films deposited on $Pt/Ti{O}-2/Si{O}_2/Si$ substrate using pulsed laser deposition for all-solid-state lithium microbattery. LLTO solid electrolyte exhibits an amorphous phase at various deposition temperatures. LLTO films deposited at 10$0^{\circ}C$ showed a clear interrace without any chemical reaction with LCO, and showed an initial discharge capacity of 50 $\mu$Ah/cm$^2$-$\mu$m and capacity retention of 90 % after 100 cycles with Li anode in 1mol$ LiCl{O}_4$ in propylene carbonate (PC). The increase of capacity retention in LLTO/LCO structure than LCO itself was attributed to the structural stability of LCO cathode films by the stacked LLTO. The cells of LLTO/LCO with LLTO grown at $100^{\circ}C$ showed a good cyclic property of 63.6 % after 300 cycles. An amorphous LLTO solid electrolyte is possible for application to solid electrolyte for all-solid-state lithium microbattery.

References

  1. Current Opinion in Solid State and Materials Science v.4 Solid state thin film lithium battery system N. J. Dudney;B. J. Neudecker https://doi.org/10.1016/S1359-0286(99)00052-2
  2. J. of KIEEME (in Korean ) v.16 no.11 Development of highperformance smart battery for notebook pcs with lithium ion battery H. S. Kim;S. I. Moon;M. S. Yun;B. H. Ko;D. H. Kim https://doi.org/10.4313/JKEM.2003.16.11.1047
  3. Solid State Ionics v.53-56 Electrical properties of amorphous lithium electrolyte thin films J. B. Bates;N. J. Dudney;G. R.;Gruzalski;R. A. Zuhr;A. Choudhury;C. F. Luck;J. D. Robertson https://doi.org/10.1016/0167-2738(92)90442-R
  4. Solid State Commun. v.86 High ionic conductivity in lithium lanthanum titanate Y. inaguma;L. Chen;M. Itoh;T. Nakamura;T. Uchida;M. Ikuta;M. Wakihara https://doi.org/10.1016/0038-1098(93)90841-A
  5. Solid State Ionics v.107 Dependence of the lithium ionic conductivity on the B-site ion sustitution in ($Li_{0.5}La_{0.5}$) $Ti_{1x} M_xO_3$ (M=Sn,Zr,Mn,Ge) H. T. Chung;J. G. Kim;H. G. Kim, https://doi.org/10.1016/S0167-2738(97)00525-0
  6. J. of KIEEME ( in Korean ) v.11 no.11 Dependence of the lithium ionic conductivity on the B-site ion sustitution in ($Li_{0.5}La_{0.5}$) $Ti_{1x} M_xO_3$(M=Sn,Zr,Mn,Ge) J. G. Kim;H. G. Kim,
  7. J. of The Electrochem. Soc. v.148 no.12 Pulsed laser deposition and characterization of crystalline lithium cobalt dioxide ($LiCoO_2$) thin films J. D. Perkins;C. S. Bahn;J. M. McGraw;P. A. Parilla;D.S. Ginley https://doi.org/10.1149/1.1415029
  8. J. of The Electrochem. Soc. v.149 no.12 Characterization of $LiCoO_2$ thin film cathodes deposited by liquid-delivery metallorganic chemical vapor deposition for rechargeable lithium batteries S. I. Cho;S. G. Yoon
  9. J. of KIEEME (in Korean ) v.11 no.11 Charge-discharge behaviour of lithium ion secondary battery using $LiCoO_2$ synthesized by a solutiion phase reaction S. P. Kim;J. S. Cho;J. H. Park;M. S. Yun;Y. B. Sim