| 正极材料Li[Ni_(1/3)Li_(1/9)Mn_(5/9)]O_2的结构和充放电过程研究 |
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| 引用本文： | 连芳,仇卫华,赵海雷,刘庆国.正极材料Li[Ni_(1/3)Li_(1/9)Mn_(5/9)]O_2的结构和充放电过程研究[J].北京科技大学学报,2007(Z2). |
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| 作者姓名： | 连芳 仇卫华 赵海雷 刘庆国 |
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| 作者单位： | 北京科技大学材料科学与工程学院 北京100083 |
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| 摘 要： | 应用X射线衍射,选区电子衍射和同步X射线衍射等方法,对锂离子电池正极材料LiNi1/3Li1/9Mn5/9]O2的结构和充放电行为进行了研究.结果表明LiNi1/3Li1/9Mn5/9]O2可标定为单相α-NaFeO2,并具有3ahex.×3ahex.×3chex.超结构特征.电池充电时,伴随锂离子的脱出,相邻氧原子层间的静电斥力逐渐增大,当电压为3.8V时应力达到最大.接近4.6V时,晶胞常数c急剧下降,绝大多数Li 从材料的锂层拔出,Ni2 发生氧化.4.6～4.8V之间c增大,a变化很小,说明过渡金属层中的Li 拔出,而过渡金属离子的氧化状态未改变.
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| 关 键 词： | 超结构 同步X射线衍射 充放电过程 |
Understanding the structure and cycle behavior of Li[Ni_(1/3)Li_(1/9)Mn_(5/9)]O_2 positive electrode material |
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| LIAN Fang,QIU Weihua,ZHAO Hailei,LIU Qingguo School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing ,China.Understanding the structure and cycle behavior of Li[Ni_(1/3)Li_(1/9)Mn_(5/9)]O_2 positive electrode material[J].Journal of University of Science and Technology Beijing,2007(Z2). |
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| Authors: | LIAN Fang QIU Weihua ZHAO Hailei LIU Qingguo School of Materials Science and Engineering University of Science and Technology Beijing Beijing China |
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| Institution: | LIAN Fang,QIU Weihua,ZHAO Hailei,LIU Qingguo School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China |
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| Abstract: | |
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| Keywords: | superstructure in-situ XRD cycle behavior |
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