Electrochemical stability of core–shell structure electrode for high voltage cycling as positive electrode for lithium ion batteries |
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| Authors: | B-C Park HJ Bang K Amine E Jung Y-K Sun |
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| Affiliation: | 1. Department of Chemical Engineering, Hanyang University, Seoul 133-791, South Korea;2. Electrochemical Technology Program, Chemical Engineering Division, Argonne National Laboratory, Argonne, IL 60493, USA;3. Department of Digital Culture & Contents, Dong-Eui University, Busan 614-714, South Korea |
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| Abstract: | The core–shell type cathode material Li(Ni0.8Co0.1Mn0.1)0.8(Ni0.5Mn0.5)0.2]O2 (CS) for Li-ion battery was synthesized via co-precipitation method. The electrochemical and thermal properties of the core–shell structured Li(Ni0.8Co0.1Mn0.1)0.8(Ni0.5Mn0.5)0.2]O2 were compared with those of the average composition of core–shell LiNi0.74Co0.08Mn0.18]O2 (ACCS) and the mixture of the core LiNi0.8Co0.1Mn0.1]O2 and the shell LiNi0.5Mn0.5]O2 material (MCS). The CS shows the enhanced electrochemical properties in a high voltage range (4.5 V and 4.6 V) as well as the typical cut-off voltage range (4.3 V). The capacity retentions of CS, core, and ACCS material were 94.2% (176.9 mAh g−1), 86.6% (172 mAh g−1), and 88.4% (169.3 mAh g−1) after 120 cycles, respectively. |
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| Keywords: | Core&ndash shell Co-precipitation Cathode Lithium ion battery |
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