Electrochemical properties of Li1+x(Ni1-yGay)O2 cathode material synthesized by emulsion method
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
To investigate the effect of Li excess and Ni substitution with Ga, powder was prepared by emulsion method and calcined atvarious temperatures for various times. The optimum condition for the synthesis of Li1+xNiO2 was to be calcined at 750 oC for24 hrs in the oxygen stream. The amount of lithium excess was determined as x = 0.12 in Li1+xNiO2 composition. The optimumcondition for the synthesis of LiNi1-yGayO2 was to be calcined at 700 oC for 36 hrs in the oxygen stream. The amount of Gasubstitution was decided as y = 0.01 in LiNi1-yGayO2 composition. From the results of the amount of lithium excess and Gasubstitution, Li1.12Ni0.99Ga0.01O2 composition was selected in this experiment. The emulsion-derived powder of this compositionwas synthesized at 700 oC for 36 hrs. The initial and final discharge capacities after 20 cycles were 158 and 121 mAh/g,respectively. The fading rate in discharge capacity after 20 cycles was 23%.
Abstract
To investigate the effect of Li excess and Ni substitution with Ga, powder was prepared by emulsion method and calcined atvarious temperatures for various times. The optimum condition for the synthesis of Li1+xNiO2 was to be calcined at 750 oC for24 hrs in the oxygen stream. The amount of lithium excess was determined as x = 0.12 in Li1+xNiO2 composition. The optimumcondition for the synthesis of LiNi1-yGayO2 was to be calcined at 700 oC for 36 hrs in the oxygen stream. The amount of Gasubstitution was decided as y = 0.01 in LiNi1-yGayO2 composition. From the results of the amount of lithium excess and Gasubstitution, Li1.12Ni0.99Ga0.01O2 composition was selected in this experiment. The emulsion-derived powder of this compositionwas synthesized at 700 oC for 36 hrs. The initial and final discharge capacities after 20 cycles were 158 and 121 mAh/g,respectively. The fading rate in discharge capacity after 20 cycles was 23%.
참고문헌 (13)
- T. Ohzuku, , Solid State Ionics, 69, pp.201~211 (1994)
- M. Broussely, , J. Power Sources, 54, pp.109~114 (1995)
- S.H. Chang, , Solid State Ionics, 86-88, pp.171~181 (1996)
- Y. Gao, , Electrochem. and Solid State Letters, 1(3), pp.117~119 (1998)
- B.-H. Kim, , Solid State Phenomena, 124-126, pp.1043~1046 (2007)
- Y. Nishida, , J. Powder Sources, 68, pp.561~564 (1997)
- B. -H. Kim, , J. Ceram. Soc. of Japan, 107(1242), pp.115~118 (1999)
- Y. -K Choi, , J. Ceram. Soc. of Japan, 108, pp.261~264 (2000)
- B. -H. Kim, , Solid State Ionics, 158, pp.281~ (2003)
- B. -H. Kim, , Ceramics International, 33, pp.837~841 (2007)
- J. N. Reimers, , Solid State Ionics, 61, pp.335~344 (1993)
- J. R. Dahn, , Solid State Ionics, 44, pp.87~97 (1990)
- 이우진, "Electrochemical properties of LiNi1-yGayO2 cathode materials synthesized by emulsion method", Journal of Ceramic Processing Research, 17(1), pp.46~49 (2016), 세라믹공정연구센터[DOI]