Comparative study of Li[Ni1/3Co1/3Mn1/3]O2 cathode material synthesized via different synthetic routes for asymmetric electrochemical capacitor applications
被引:30
作者:
Yoon, J. -H.
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机构:
Hanyang Univ, Dept Chem Engn, Ctr Informat & Commun Mat, Seoul 133791, South KoreaHanyang Univ, Dept Chem Engn, Ctr Informat & Commun Mat, Seoul 133791, South Korea
Yoon, J. -H.
[1
]
Bang, H. J.
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Hanyang Univ, Dept Chem Engn, Ctr Informat & Commun Mat, Seoul 133791, South KoreaHanyang Univ, Dept Chem Engn, Ctr Informat & Commun Mat, Seoul 133791, South Korea
Bang, H. J.
[1
]
Prakash, Jai
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IIT, Dept Environm Chem & Engn, Ctr Electrochem Sci & Engn, Chicago, IL 60616 USAHanyang Univ, Dept Chem Engn, Ctr Informat & Commun Mat, Seoul 133791, South Korea
Prakash, Jai
[2
]
Sun, Y. -K.
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Hanyang Univ, Dept Chem Engn, Ctr Informat & Commun Mat, Seoul 133791, South KoreaHanyang Univ, Dept Chem Engn, Ctr Informat & Commun Mat, Seoul 133791, South Korea
Sun, Y. -K.
[1
]
机构:
[1] Hanyang Univ, Dept Chem Engn, Ctr Informat & Commun Mat, Seoul 133791, South Korea
[2] IIT, Dept Environm Chem & Engn, Ctr Electrochem Sci & Engn, Chicago, IL 60616 USA
asymmetric electrochemical capacitor;
lithium transition metal oxide;
pore size distribution;
leakage current;
voltage maintenance;
D O I:
10.1016/j.matchemphys.2008.01.032
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
Layered Li[Ni1/3Co1/3Mn1/3]O-2 cathode materials were synthesized by different synthesis routes using carbonate and hydroxide co-precipitation methods. Physical properties of the prepared Li[Ni1/3Co1/3Mn1/3]O-2 varied depending on the synthesis method employed. These materials were applied as a positive electrode to an asymmetric electrochemical capacitor with activated carbon as the negative electrode and the electrochemical properties of the capacitor were studied. Li[Ni1/3Co1/3Mn1/3]O-2 prepared by the carbonate co-precipitation exhibited higher capacitance and better rate capability with stable cycling retention over 500 cycles than Li[Ni1/3Co1/3Mn1/3]O-2 prepared by the hydroxide co-precipitation. The asymmetric electrochemical capacitor (AEC) cell (AC/Li[Ni1/3Co1/3Mn1/3]O-2) had a voltage slope from 0.2 to 2.2 V and delivered a capacity of 60 F g(-1) with a capacity retention of 88.4% during 500 cycles based on the overall active materials weight. The leakage current was largely decreased for the asymmetric electrochemical capacitor and the maintained voltage was 84.4% during 3 days. (C) 2008 Elsevier B.V. All rights reserved.