Lithium cobalt oxide powders have been successfully prepared by a molten-salt synthesis (MSS) method using a eutectic mixture of LiCl and Li₂CO₃ salts. The physico-chemical properties of the lithium cobalt oxide powders are investigated by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), particle-size analysis and charge–discharge cycling. A lower temperature and a shorter time (∼700°C and 1 h) in the Li:Co=7 system are sufficient to prepare single-phase HT-LiCoO₂ powders by the MSS method, compared with the solid-state reaction method. Charge–discharge tests show that the lithium cobalt oxide prepared at 800°C has an initial discharge capacity as high as 140 mA h g⁻¹, and 100 mA h g⁻¹ after 40 cycles. The dependence of the synthetic conditions of HT-LiCoO₂ on the reaction temperature, time and amount of flux with respect to starting oxides is extensively investigated.

中文翻译：

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LiCl–Li ₂ CO ₃的共熔混合物熔融盐合成锂钴氧化物的合成及电化学性能

使用LiCl和Li ₂ CO ₃盐的低共熔混合物，通过熔融盐合成（MSS）方法已成功制备了钴酸锂粉末。通过粉末X射线衍射（XRD），扫描电子显微镜（SEM），粒度分析和充放电循环研究了钴酸锂粉末的物理化学性质。Li：Co = 7系统中较低的温度和较短的时间（约700°C和1小时）足以通过MSS方法与固态反应方法相比制备单相HT-LiCoO ₂粉末。充放电测试表明，在800°C下制备的钴酸锂的初始放电容量高达140 mA h g ^-1和100 mA h g ^-1经过40个周期。广泛研究了HT-LiCoO ₂的合成条件对反应温度，时间和相对于起始氧化物的助熔剂量的依赖性。