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Effects of cathode fabrication conditions and cycling on the electrochemical performance of LiNiO2 synthesized by combustion and calcination |
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| Authors: | Sung Nam Kwon Jihong SongDaniel R Mumm |
| Affiliation: | a Department of Hydrogen and Fuel Cells Engineering, Specialized Graduate School, Chonbuk National University, 664-14 Deogjindong 1-ga Deogjingu Jeonju 561-756, Republic of Korea b College of Arts and Sciences, Cornell University, 147 Goldwin Smith, Ithaca, NY 14853, USA c Department of Chemical Engineering and Materials Science, University of California, Irvine, CA 92697-2575, USA |
| Abstract: | LiNiO2 was synthesized by the combustion method with various excess lithium amount z in Li1 + zNiO2 (z = 0.04, 0.08, 0.10, 0.12, and 0.15). The sample with z = 0.10 has the largest first discharge capacity of 195 mAh/g at 0.1 C rate and voltage range 2.7-4.4 V with the weight ratio of active material:acetylene black:binder = 85:10:5. The LiNiO2 cathodes, in which the excess lithium amount z for the synthesis of LiNiO2 was 0.10, were fabricated with various weight ratios of active material:acetylene black:binder (85:10:5, 85:12:3, and 90:7:3). The cathode with the ratio of active material:acetylene black:binder 85:10:5 has the best electrochemical properties. The variation, with C-rate, of discharge capacity vs. number of cycles curve for the LiNiO2 cathode with the weight ratio of active material:acetylene black:binder = 85:10:5 was investigated. At 0.1 C rate, the LiNiO2 cathode has the largest first discharge capacity, the discharge capacity degradation rate of 0.70 mAh/g/cycle and a discharge capacity at n = 50 of 134 mAh/g. |
| Keywords: | LiNiO2 Combustion method Discharge capacity Cathode fabrication conditions I0 0 3/I1 0 4 R-factor |
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