Synthesis and characterization of integrated layered nanocomposites for lithium ion batteries |
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Authors: | Jihyeon Gim Jinju Song Hyosun Park Jungwon Kang Kangkun Kim Vinod Mathew Jaekook Kim |
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Affiliation: | (1) Department of Materials Science and Engineering, Chonnam National University, 300 Yongbongdong, Bukgu, Gwangju, 500-757, South Korea |
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Abstract: | The series of Li[Ni x M x Li1/3-x Mn2/3-x ]O2 cathodes, where M is cobalt or chromium with a wide compositional range x from 0 to 0.33, were prepared by hydroxide coprecipitation method with subsequent quenching. The sample structures were investigated using X-ray diffraction results which were indexed completely on the basis of a trigonal structure of space group with monoclinic C2/m phase as expected. The morphologies and electrochemical properties of the samples obtained were compared as the value of x and substituted transition metal. The particle sizes of cobalt-substituted Li[Ni x Co x Li1/3-x Mn2/3-x ]O2 samples are much smaller than those of the Li[Ni x Cr x Li1/3-x Mn2/3-x ]O2 system. The electrode containing Li[Ni x Co x Li1/3-x Mn2/3-x ]O2 with x = 0.10 delivered a discharge capacity of above 200 mAh/g after 10 cycles due to the activation of Li2MnO3. |
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Keywords: | lithium ion batteries cathodes nanocomposites coprecipitation |
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