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首页> 外文会议>International Conference on Materials for Renewable Energy and Environment >The doping effect on the electrochemical performance of LiNiinf0.305/infMninf0.33/infCoinf0.33/infMinf0.025/infOinf2/inf (Mamp;#x003D;Al, Y, Cr) for lithium-ion batteries
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The doping effect on the electrochemical performance of LiNiinf0.305/infMninf0.33/infCoinf0.33/infMinf0.025/infOinf2/inf (Mamp;#x003D;Al, Y, Cr) for lithium-ion batteries

机译：掺杂效果对LINI 0.305电化学性能的掺杂效果 0.33 CO 0.33 M 0.025 O 2 < / INF>（M＆＃X003D; AL，Y，CR）用于锂离子电池

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摘要

LiNi0.305Mn0.33Co0.33M0.025O2 (M=Al, Y, Cr) materials were synthesized via the sol-gel method. The structure and electrochemical properties were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and charge/discharge tests. The materials were maintained the α-NaFeO2 type layered structure and the discharge capacity was also increased by doping. The Y- and Al- doping slightly decrease the initial discharge capacity of LiNi0.33Mn0.33Co0.33O2 while the Cr-doping can increase the initial discharge capacity. The cycling performances are improved after doping. When cycled at 1.0C, about 99%, 98.6% and 97.1% of their initial capacities can be retained after 40 cycles for Y-, Al- and Cr-doped materials, respectively. Their rate capabilities are also better than that of the un-doped one. EIS measurement shows that the Y-doped electrode has the lowest resistance impedance value during cycling.
机译：通过溶胶 - 凝胶法合成LINI0.305MN0.33CO0.33M0.025O2（M = Al，Y，Cr）材料。通过X射线衍射（XRD），扫描电子显微镜（SEM），循环伏安法（CV），电化学阻抗光谱（EIS）和充电/放电测试的结构和电化学性能。材料被保持α-NafeO2型分层结构，并且通过掺杂也增加了放电容量。 Y-和AL-掺杂略微降低LINI0.33MN0.33CO0.33O2的初始放电容量，而CR掺杂可以增加初始放电容量。掺杂后循环性能得到改善。当在1.0℃下循环时，分别在40次循环的Y-，Al-和Cr掺杂材料后，预约99％，98.6％和97.1％的初始容量可以保留。它们的速率能力也比未掺杂的速率能力更好。 EIS测量表明，Y掺杂电极在循环期间具有最低的电阻阻抗值。

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