Optimization for synthesis technology of LiNi0.8Co0.1Mn0.1O2 cathode material and electrochemical performance

被引：0

作者：

Xiao Z. ^{[1
]}

Hu C. ^{[1
]}

Song L. ^{[1
]}

Lu Y. ^{[1
]}

Liu J. ^{[1
]}

Zeng P. ^{[1
]}

机构：

[1] Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha, 410114, Hunan

来源：

Huagong Xuebao/CIESC Journal | 2017年 / 68卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Electrochemistry; High-temperature solid-state; LiNi[!sub]0.8[!/sub]Co[!sub]0.1[!/sub]Mn[!sub]0.1[!/sub]O[!sub]2[!/sub; Lithium-ion battery; Stability; Synthesis;

D O I：

10.11949/j.issn.0438-1157.20161631

中图分类号：

学科分类号：

摘要：

Ni-rich ternary cathode material LiNi0.8Co0.1Mn0.1O2 for lithium-ion battery was synthesized by a high-temperature solid-state reaction method, and its process conditions were optimized. The structural and morphological features of LiNi0.8Co0.1Mn0.1O2 cathode material prepared were investigated with X-ray diffraction and scanning electron microscopy. Its electrochemical properties were analyzed. The results showed that under the oxygen atmosphere, the molar ratio of lithium to metal elements was 1.05:1, the sintering time was 15 h and the sintering temperature was 750℃, the optimal synthesis conditions were obtained. The initial discharge capacity of the sample was 174.9 mA·h·g-1 at 1C, the specific capacity was 158.5 mA·h·g-1 after 50 cycles, and the capacity retention rate was 90.62%, which showed good cycle stability. The results of XRD and SEM showed that the sample sintered in oxygen atmosphere had a good layered structure with a small degree of cationic mixing and a good spherical shape. The particles were uniformly distributed in the range of 10-20 μm. The results of cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) showed that the electrochemical performance of the cathode materials was improved by optimization conditions. © All Right Reserved.

引用

页码：1652 / 1659

页数：7

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