Electrochemical properties of lithium nickel oxide synthesized by the combustion method in an O2 stream |
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| Authors: | Myoung Youp Song Ik Hyun Kwon Hye Ryoung Park Daniel R. Mumm |
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| Affiliation: | 1. Division of Advanced Materials Engineering, Department of Hydrogen and Fuel Cells, Research Center of Advanced Materials Development, Engineering Research Institute, Chonbuk National University, 664-14, 1-Ga Deogjin-Dong, Deogjin-Gu, Jeonju, Jeonbuk 561-756, Republic of Korea;2. Jeonbuk Technopark Regional Industry Evaluation Agency, 723-1, 2ga Palbok-Dong, Dukjin-Gu, Jeonju, Jeonbuk 561-844, Republic of Korea;3. School of Applied Chemical Engineering, Chonnam National University, 300 Yongbongdong, Bukgu, Gwangju 500-757, Republic of Korea;4. Department of Chemical Engineering and Materials Science, University of California Irvine, Irvine, CA 92697-2575, USA |
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| Abstract: | An appropriate mole ratio of urea/nitrate for preheating to synthesize LiNiO2 was examined by varying the ratio from 1.2 to 9.6. The chemical equation of the combustion reaction was deduced from the XRD analysis result of the mixture after preheating. The XRD pattern of the LiNiO2 sample calcined at 800 °C for 24 h, after preheating at the mole ratio of urea/nitrate of 3.6 at 400 °C, shows clear split of the 1 0 8 and 1 1 0 peaks, and the largest value of I003/I104. The sample calcined at 800 °C for 24 h has a relatively high first discharge capacity (164.2 mAh g?1) and a good cycling performance. Derivative ?dx/|dV| vs. V curve of the LiNiO2 sample at the voltage range of 2.7–4.4 V for the first cycle exhibits four peaks for charging and discharging, showing that this sample goes through four phase transitions. |
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