Effect of Stirring on Particle Shape and Size in Hydrothermal Synthesis of LiCoO2,ACS Omega

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Effect of Stirring on Particle Shape and Size in Hydrothermal Synthesis of LiCoO2
ACS Omega ( IF 3.7 ) Pub Date : 2024-05-21 , DOI: 10.1021/acsomega.4c01031
Naoki Hamao ₁ , Hiroki Itasaka ₁ , Ken-Ichi Mimura ₁ , Zheng Liu ₁ , Koichi Hamamoto ₁

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Lithium cobalt oxide (LCO) is a highly significant material for the positive electrodes of lithium-ion batteries. Due to the correlation between crystal morphology and electrochemical performance in the layered rock-salt structure, LCO with crystal morphology exhibiting anisotropy demonstrates superior charge–discharge characteristics. In this study, various morphologies of LCO were synthesized via hydrothermal synthesis using a plate-like precursor. Under conditions without agitation, a hexagonal plate-like LCO was synthesized, while a spherical LCO was obtained with agitation during synthesis. The particle morphology was investigated by using X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Furthermore, in the performance evaluation of positive electrode materials for lithium-ion batteries, the hexagonal plate-like LCO exhibited a larger charge–discharge capacity compared to the spherical LCO.

中文翻译：

水热合成LiCoO2 搅拌对颗粒形状和尺寸的影响

钴酸锂（LCO）是一种非常重要的锂离子电池正极材料。由于层状岩盐结构中晶体形态和电化学性能之间的相关性，晶体形态表现出各向异性的LCO表现出优异的充放电特性。在这项研究中，使用板状前驱体通过水热合成合成了各种形态的 LCO。在不搅拌的条件下，合成了六角板状的LCO，而在合成过程中搅拌则得到了球形的LCO。通过使用X射线衍射（XRD）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）研究颗粒形态。此外，在锂离子电池正极材料的性能评价中，六方板状LCO相比球形LCO表现出更大的充放电容量。

更新日期：2024-05-21

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