Electrochemical performance of cobalt-substituted lithium nickel oxides synthesized from lithium and nickel carbonates and cobalt oxide |
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| Authors: | Ho Rim Hye Ryoung Park Myoung Youp Song |
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| Affiliation: | 1. ASE Korea, 494 Munbal-dong Paju-si Gyeonggi-do, 413-790, Republic of Korea;2. School of Applied Chemical Engineering, Chonnam National University, 300 Yongbong-dong Buk-gu Gwangju, 500-757, Republic of Korea;3. Division of Advanced Materials Engineering, Hydrogen & Fuel Cell Research Center, Engineering Research Institute, Chonbuk National University,664-14 Deogjindong 1Ga Deogjingu, 567 Baekje-daero Deokjin-gu Jeonju, 561-756, Republic of Korea |
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| Abstract: | LiNi1?yCoyO2 (y=0.1, 0.3 and 0.5) cathode materials were synthesized by a solid-state reaction method at different temperatures using Li2CO3 as a Li source, NiCO3 as a Ni source, and Co3O4 as a Co source. The electrochemical properties of the synthesized samples were then investigated. Structures of the synthesized LiNi1?yCoyO2 (y=0.1, 0.3 and 0.5) samples were analyzed, and microstructures of the samples were observed. Voltage vs. x in LixNi1?yCoyO2 curves for the first and second charge–discharge cycles and intercalated and deintercalated Li quantity Δx were studied. LiNi0.9Co0.1O2 synthesized at 800 °C had the largest first discharge capacity (152 mAh/g) and quite good cycling performance, with a discharge capacity of 146 mAh/g at n=5. It had a discharge capacity fading rate of 1.4 mAh/g/cycle. |
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