| Synthesis of layered LiMnO2 by in situ oxidationintercalation and a study of the reaction mechanism and electrochemical performance |
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| 摘 要： | Lithium-ion batteries have become the main candi-date for rechargeable power sources in current electronicproducts because of their high open circuit voltage, highenergy density, longevity and absence of memory effect.Layered LiCoO2 has been used commerci…
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| 关 键 词： | LiMnO2 氧化反应 电化学特性 锂离子电池 分析方法 |
| 收稿时间： | 2004-03-24 |
Synthesis of layered LiMnO2 by in situ oxidation-intercalation and a study of the reaction mechanism and electrochemical performance |
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| Affiliation: | LI Xiaodan,YANG Wensheng,D.G.Evans & DUAN Xue Key Laboratory of Science and Technology of Controllable Chemical Reactions,Ministry of Education,Beijing University of Chemical Tech- nology,Beijing 100029,China |
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| Abstract: | Using Mn(OH)2 as precursor, LiOH as lithiating agent and (NH4)2S2O8 as oxidant, layered o-LiMnO2 was obtained by a novel method——in situ oxidation-intercalation under mild conditions (80℃). The product was characterized by XRD, ICP, TEM and 7Li-NMR. The results reveal that orthorhombic LiMnO2 with high purity and good crystallin-ity can be obtained by this method. During electrochemical tests, a LiMnO2/Li cell shows an initial reversible capacity of 208 mAh·g−1 and a reversible capacity of 180 mAh·g−1 after 30 cycles at room temperature. |
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| Keywords: | layered LiMnO2 in situ oxidation-intercalation Mn (OH)2 precursor. |
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