掺铝富锂材料Li1.2Mn0.543Co0.078Ni0.155Al0.030O2电极的电化学性能 |
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引用本文: | 金晓茜,李益孝,杨勇,王周成. 掺铝富锂材料Li1.2Mn0.543Co0.078Ni0.155Al0.030O2电极的电化学性能[J]. 电化学, 2014, 20(2): 116. DOI: 10.13208/j.electrochem.130516 |
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作者姓名: | 金晓茜 李益孝 杨勇 王周成 |
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作者单位: | 厦门大学化学化工学院,福建 厦门 361005 |
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基金项目: | 国家重点基础研究发展计划项目(No.2007CB935603)资助 |
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摘 要: | 本文合成了掺铝富锂材料Li1.2Mn0.543Co0.078Ni0.155Al0.030O2,并使用扫描电镜(SEM)、粉末X射线衍射(XRD)、电感耦合等离子体原子发射光谱(ICP-AES)和拉曼散射光谱(Raman)等观察表征富锂和掺铝富锂材料. 结果表明,共沉淀法合成掺铝富锂材料,具有R-3m空间群结构,Al元素进入晶格,未单独成相. 电化学性能和非现场XRD测试结果表明,4%(by mole)掺铝富锂电极100周期循环容量保持率83.7%,Al元素掺杂有利于容量的释放,增强了电极富锂材料的结构稳定性,提高了循环性能.
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关 键 词: | 锂离子电池 富锂材料 Al掺杂 循环性能 |
收稿时间: | 2013-05-16 |
Effect of Al-Doping in Li-Rich Material Li1.2Mn0.543Co0.078Ni0.155Al0.030O2 for Lithium-Ion Batteries |
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Abstract: | The Al-doped 0.5Li2MnO3·0.5Li(Mn0.4Co0.2Ni0.4)O2 compounds were successfully synthesized as cathode materials for lithium-ion batteries. The pristine and Al-doped materials were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), inductively coupled plasma-atomic emission spectrometry (ICP-AES) and laser Raman spectroscopy. The results indicated that all the prepared materials were indexed as a hexagonal structure with R-3m space group, and Al element had been introduced into lattice. When cycled at 180 mA·g-1 (1 C-rate), the capacity retention of 4% (by mole) Al-doped 0.5Li2MnO3·0.5Li(Mn0.4Co0.2Ni0.4)O2 electrode was as high as 83.7% after 100 cycles. The Al-doped materials could enhance the structural stability of electrodes, which contributes to high stabilized performance of cathode material for lithium ion batteries. |
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Keywords: | lithium-ion battery lithium enriched material Al-doping cycling performance |
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