LiNi0.5Mn1.5O4 material with a spinel structure is prepared by a sol-gel method. The material is initially fired at 850 T and then subjected to a post-reaction annealing at 600 T in order to minimize the nickel deficiency. The elevated firing temperature produces materials with a small surface-area which is beneficial for good capacity retention. Indeed, the spinel LiNi0.5Mn1.5O4 not only shows a good cycle performance, but exhibits an excellent discharge capacity, i.e. 114 mAh g(-1) at 4.66 V plateau and 127 mAh g(-1) in total. Cyclic voltammetry and ac impedance spectroscopy are employed to characterize the reactions of lithium insertion and extraction in the LiNi0.5Mn1.5O4 electrode. Excellent electrochemical performance and low material cost make this compound an attractive cathode for advanced lithium batteries. (C) 2002 Elsevier Science B.V. All rights reserved.
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Japan Storage Battery Co Ltd, Ctr Corp Res & Dev, Fundamental Technol Lab, Minami Ku, Kyoto 601, JapanJapan Storage Battery Co Ltd, Ctr Corp Res & Dev, Fundamental Technol Lab, Minami Ku, Kyoto 601, Japan
Amine, K
Tukamoto, H
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Japan Storage Battery Co Ltd, Ctr Corp Res & Dev, Fundamental Technol Lab, Minami Ku, Kyoto 601, JapanJapan Storage Battery Co Ltd, Ctr Corp Res & Dev, Fundamental Technol Lab, Minami Ku, Kyoto 601, Japan
Tukamoto, H
Yasuda, H
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Japan Storage Battery Co Ltd, Ctr Corp Res & Dev, Fundamental Technol Lab, Minami Ku, Kyoto 601, JapanJapan Storage Battery Co Ltd, Ctr Corp Res & Dev, Fundamental Technol Lab, Minami Ku, Kyoto 601, Japan
Yasuda, H
Fujita, Y
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Japan Storage Battery Co Ltd, Ctr Corp Res & Dev, Fundamental Technol Lab, Minami Ku, Kyoto 601, JapanJapan Storage Battery Co Ltd, Ctr Corp Res & Dev, Fundamental Technol Lab, Minami Ku, Kyoto 601, Japan
机构:
Japan Storage Battery Co Ltd, Ctr Corp Res & Dev, Fundamental Technol Lab, Minami Ku, Kyoto 601, JapanJapan Storage Battery Co Ltd, Ctr Corp Res & Dev, Fundamental Technol Lab, Minami Ku, Kyoto 601, Japan
Amine, K
Tukamoto, H
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Japan Storage Battery Co Ltd, Ctr Corp Res & Dev, Fundamental Technol Lab, Minami Ku, Kyoto 601, JapanJapan Storage Battery Co Ltd, Ctr Corp Res & Dev, Fundamental Technol Lab, Minami Ku, Kyoto 601, Japan
Tukamoto, H
Yasuda, H
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Japan Storage Battery Co Ltd, Ctr Corp Res & Dev, Fundamental Technol Lab, Minami Ku, Kyoto 601, JapanJapan Storage Battery Co Ltd, Ctr Corp Res & Dev, Fundamental Technol Lab, Minami Ku, Kyoto 601, Japan
Yasuda, H
Fujita, Y
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Japan Storage Battery Co Ltd, Ctr Corp Res & Dev, Fundamental Technol Lab, Minami Ku, Kyoto 601, JapanJapan Storage Battery Co Ltd, Ctr Corp Res & Dev, Fundamental Technol Lab, Minami Ku, Kyoto 601, Japan