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

XIAO Zhongliang; HU Chaoming; SONG Liubin; LU Yipeng; LIU Jiao; ZENG Peng

doi:10.11949/j.issn.0438-1157.20161631

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Optimization for synthesis technology of LiNi_0.8Co_0.1Mn_0.1O₂ cathode material and electrochemical performance

更新时间：2025-12-10

- Optimization for synthesis technology of LiNi_0.8Co_0.1Mn_0.1O₂ cathode material and electrochemical performance
- CIESC Journal Issue 4, Pages: 1652-1659(2017)
- 作者机构：
  
  长沙理工大学化学与生物工程学院, 电力与交通材料保护湖南省重点实验室,湖南,长沙,410114
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20161631
  CLC： M912.9
- Online First：05 April 2017，
  
  Published：05 April 2017
- 稿件说明：
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XIAO Zhongliang, HU Chaoming, SONG Liubin, et al. Optimization for synthesis technology of LiNi_0.8Co_0.1Mn_0.1O₂ cathode material and electrochemical performance[J]. CIESC Journal, 2017, (4): 1652-1659. DOI: 10.11949/j.issn.0438-1157.20161631.
DOI：

XIAO Zhongliang, HU Chaoming, SONG Liubin, et al. Optimization for synthesis technology of LiNi_0.8Co_0.1Mn_0.1O₂ cathode material and electrochemical performance[J]. CIESC Journal, 2017, (4): 1652-1659. DOI: 10.11949/j.issn.0438-1157.20161631. DOI：

摘要

采用高温固相法合成锂离子电池富镍三元材料LiNi0.8Co0.1Mn0.1O2，对其工艺条件进行优化，对产物进行X射线衍射（XRD（，扫描电镜（SEM（以及电化学性能分析。结果表明：在氧气气氛下，锂与金属元素摩尔比为1.05:1、烧结时间15 h、烧结温度750℃为最佳合成工艺条件。按最佳工艺合成的样品在1C首次放电容量高达174.9 mA·h·g-1，50次循环后比容量为158.5 mA·h·g-1，容量保持率为90.62%，表现出良好的循环稳定性。XRD和SEM表征表明，在氧气气氛下烧结的样品有良好的层状结构，阳离子混排程度小，具有较好的类球形，粒径均匀分布在10~20 μm。循环伏安（CV（和电化学阻抗（EIS（结果表明，工艺条件的优化有助于提高正极材料的电化学性能。

Abstract

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.

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