Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 694, Issue -, Pages 703-709Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.10.062
Keywords
Lithium-ion battery; Cathode material; Lithium nickel cobalt aluminum oxide; Co-precipitation; Carbonate process
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Funding
- Leading Human Resource Training Program of Regional Neo industry through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and future Planning [NRF-2016H1D5A1910545]
- Ministry of Trade, Industry and Energy (MOTIE), Korea Institute for Advancement of Technology (KIAT) through the Encouragement Program for The Industries of Economic Cooperation Region
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We co-precipitated the precursor of a nickel-rich cathode material with high energy density-layered lithium nickel cobalt aluminum oxide (NCA, Li(NixCoyAl1-x-y)O-2)-via a carbonate route, and we tested the cell performance of NCA synthesized from this precursor. The precursor for NCA had been previously co-precipitated via a hydroxide route, with a long residence time that caused low productivity. We obtained spherical precursor particles with uniform particle size distribution through the carbonate route. We found that the precursor has the form of (Ni0.8Co0.16Al0.04)(CO3)(0.41)(OH)(1.18) and the precursor particles grow much faster than the hydroxide form with the same metal composition, (Ni0.8Co0.16Al0.04)(OH)(2). The faster particle growth rate is attributed to the low solubility of the precursor in mild pH condition of co-precipitation (pH = 8.0). NCA from this precursor showed an initial discharge capacity of 183 mAh/g at 0.1C-rate, while retaining 91% of its capacity after 100 cycles representing improved performance over those of NCA from the hydroxide route with the same residence time. We believe faster particle growth, uniform particle size distribution, and morphology to be the reasons for the improved performance. (C) 2016 Elsevier B.V. All rights reserved.
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