Nanocrystalline LiCoO2 particles have been surface modified with La2O3 by a simple and cost effective resin coating process. The synthesized pure and La2O3 coated samples were characterized by thermogravimetric analysis / differential scanning calorimetry (TGA/DSC), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. XRD studies revealed that the presence of La2O3 coating over LiCoO2 particles did not affect the original layer structure of pure LiCoO2. Also, no extra peak was detected for La2O3 phase. FTIR results confirmed the structural co-ordination of the samples. Also, the shifting and broadening of IR peaks corresponding to LiCoO2 confirmed the presence of IR peaks of La2O3. TEM image showed the formation of interconnected small nanoparticle subunits structure for LiCoO2. TEM image also showed the presence of thin La2O3 layer over LiCoO2 particles. The cyclic voltammetry studies revealed that the La2O3 coated LiCoO2 particles exhibited reversible redox peaks with slight increase in peak intensity and peak area compared to pure LiCoO2. It indicates an improved charge storage capacity of La2O3 coated LiCoO2 sample compared to pure LiCoO2 sample. GRAPHICAL ABSTRACT

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La2O3 包覆 LiCoO2 颗粒的结构和电化学研究

纳米晶 LiCoO2 颗粒已通过简单且具有成本效益的树脂涂层工艺用 La2O3 进行表面改性。通过热重分析/差示扫描量热法 (TGA/DSC)、X 射线衍射 (XRD)、傅里叶变换红外 (FTIR) 光谱、扫描电子显微镜 (SEM) 和透射电子显微镜 (TEM) 对合成的纯样品和 La2O3 涂层样品进行表征。 ) 技术。XRD 研究表明，在 LiCoO2 颗粒上存在 La2O3 涂层不会影响纯 LiCoO2 的原始层结构。此外，未检测到 La2O3 相的额外峰。FTIR 结果证实了样品的结构协调。此外，对应于 LiCoO2 的 IR 峰的移动和加宽证实了 La2O3 的 IR 峰的存在。TEM 图像显示了 LiCoO2 的互连小纳米粒子亚单元结构的形成。TEM 图像还显示在 LiCoO2 颗粒上存在薄的 La2O3 层。循环伏安法研究表明，与纯 LiCoO2 相比，La2O3 包覆的 LiCoO2 颗粒表现出可逆的氧化还原峰，峰强度和峰面积略有增加。这表明与纯 LiCoO2 样品相比，La2O3 涂覆的 LiCoO2 样品的电荷存储容量有所提高。图形概要 这表明与纯 LiCoO2 样品相比，La2O3 涂覆的 LiCoO2 样品的电荷存储容量有所提高。图形概要 这表明与纯 LiCoO2 样品相比，La2O3 涂覆的 LiCoO2 样品的电荷存储容量有所提高。图形概要