Synthesis and electrochemical properties of LiNi0.80(Co0.20−xAlx)O2 (x = 0.0 and 0.05) cathodes for Li ion rechargeable batteries |
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| Affiliation: | 1. Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, PR China;2. Graduate University of Chinese Academy of Sciences, Beijing 100039, PR China;1. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing Key Laboratory of Environment Science and Engineering, Beijing 100081, China;2. Beijing Higher Institution Engineering Research Center of Power Battery and Chemical Energy Materials, Beijing 100081, China;3. Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing 100081, China;4. Institute of Electric Engineering, China Academy of Engineering Physics, Mianyang 621900, China;5. Key Laboratory of Small Fuctional Organic Molecule, Ministry of Education, Jiangxi Normal University, Nanchang 330022, China |
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| Abstract: | The effect of simultaneous cobalt as well as aluminum doping was studied to understand their effect on the phase formation behavior and electrochemical properties of solution derived lithium nickel oxide cathode materials for rechargeable batteries. The discharge capacities of LiNi0.80Co0.20O2 and LiNi0.80Co0.15Al0.05O2 cathodes, measured at constant current densities of 0.45 mA cm−2 in the cut-off voltage range of 4.3–3.2 V, were 100 and 136 mAh g−1, respectively. LiNi0.80Co0.15Al0.05O2 had better cycleability than the LiNi0.80Co0.20O2 cathodes. The retention of undesirable Li2CO3 phase both in LiNi0.80Co0.20O2 and LiNi0.80Co0.15Al0.05O2 cathodes was argued to be responsible for the relatively lower discharge capacity of these materials. |
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