Synthesis of metal ion substituted P2-Na2/3Ni1/3Mn2/3O2 cathode material with enhanced performance for Na ion batteries
Synthesis of metal ion substituted P2-Na2/3Ni1/3Mn2/3O2 cathode material with enhanced performance for Na ion batteries
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DOI：
10.1016/j.matlet.2014.07.153
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发表时间：
2014-11-15
影响因子：
3
通讯作者：
Noguchi, Hideyuki
中科院分区：
文献类型：
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作者：
Zhao, Wenwen;Kirie, Hideyuki;Noguchi, Hideyuki
研究了金属离子掺杂P2-Na 2/3 Ni 2/9 Mn 1/9 Mn 2/3 O2（M=Mg、Al、Fe和Co）的结构和电化学性能。X射线衍射（XRD）结果表明，Ni的部分取代对P2-Na 2/3 Ni 1/3 Mn 2/3 O2的主要结构没有影响。拉曼散射和傅里叶变换红外光谱（FTIR）的结果表明，短程结构可能会受到影响。与P2-Na 2/3 Ni 1/3 Mn 2/3 O2的多步型充放电曲线相反，金属取代的样品显示出倾斜的充放电曲线。此外，与P2-Na 2/3 Ni 1/3 Mn 2/3 O2相比，它们表现出增强的循环性能。研究表明，对P2-Na 2/3 Ni 1/3 Mn 2/3 O2进行金属取代改性，将有助于获得性能更好的层状含钠化合物正极材料。(C)2014爱思唯尔有限公司版权所有。
The structure and electrochemical properties of metal ion substituted P2-Na2/3Ni2/9Mn1/9Mn2/3O2 (M=Mg, Al, Fe, and Co) were investigated. X-ray diffraction (XRD) results reveal that the partial substitution of Ni with other metal ions has no effect on the main structure of P2-Na2/3Ni1/3Mn2/3O2. Raman scattering and Fourier transform infrared spectroscopy (FTIR) results demonstrate that short-range structure might be affected. In contrast to the multi-step type charge-discharge profiles for pristine P2-Na2/3Ni1/3Mn2/3O2, metal substituted samples show sloping charge-discharge curves. Furthermore, they exhibit enhanced cycling performance compared to P2-Na2/3Ni1/3Mn2/3O2. Our study suggests that further modification of P2-Na2/3Ni1/3Mn2/3O2 with metal substitution would shed some light on achieving layered Na-containing compounds cathode material with enhanced performance for Na ion batteries. (C) 2014 Elsevier B.V. All rights reserved.