질화 처리된 LATP 고체전해질의 알칼라인 용액내에서의 내화학특성 개선 연구 = Nitrided LATP Solid Electrolyte for Enhanced Chemical Stability in Alkaline Media

다국어 초록 (Multilingual Abstract)

In the present work, to increase the chemical stability of the lithium-ion-conducting ceramic electrolyte ($Li_{1+x+y}Al_xTi_{2-x}Si_yP_{3-y}O_{12}$, LATP) in the strong alkaline solution, the surface of LATP was modified by the nitridation process. The surface and structural properties of nitride LATP solid electrolyte were characterized by X-ray diffraction, X-ray photoelectron spectrometer and scanning electron microscopy and ac-impedance spectroscopy, which were correlated to the chemical stability and electrochemical performance of LATP. The nitrided LATP immersed in the alkaline solution for 30 days exhibits the enhanced chemical stability than the pristine LATP. Moreover, a rechargeable hybrid Li-air battery constructed with the nitrided LATP solid electrolyte shows considerably reduced discharge-charge voltage gaps (enhanced the round-trip efficiency) in comparison to the cell constructed with pristine LATP, which indicate that the surface nitridation process can be the efficient way to improve the chemical stability of solid electrolyte in alkaline media.

참고문헌 (Reference)

1 M. Armand, 451 : 652-, 2008

2 F. Ding, 214 : 292-, 2012

3 G. Girishkumar, 1 : 2193-, 2010

4 F. Cheng, 41 : 2172-, 2012

5 J. Fu, 80 : 1901-, 1997

6 N. Imanishi, 185 : 1392-, 2008

7 T. Zhang, 12 : A132-, 2009

8 T. Zhang, 46 : 1661-, 2010

9 Y. Wang, 195 : 358-, 2010

10 P. He, 12 : 1686-, 2010

11 L. Li, 14 : 78-, 2012

12 S. Hasegawa, 189 : 371-, 2009

13 Y. Shimonishi, 195 : 6187-, 2010

14 J. S. Thokchom, 154 : A331-, 2007

15 B. Kumar, 74 : 226-, 1991

16 V. Neburchilov, 195 : 1271-, 2010