Abstract This paper reports the synthesis of LiNi0.8Co0.15Al0.05O2 (NCA) cathode powders using a simple flame assisted spray pyrolysis (FSP) and a spray drying (SD) processes, in which metal salt precursors dissolved in glycerol were used for spraying. X-ray diffraction confirms that the NCA powders have a layered structure, with a low order of cationic mixing. Electron microscopy shows that the particles produced by FSP have a relatively smaller size and a smoother surface than that produced by SD. The NCA powder from the FSP process has an initial discharge capacity of 200.2 mAh/g in voltage range of 3.0–4.3 V at 0.1C. It shows very good capacity retention of 91.5% at 1C and 89.4% at 5C after 200 cycles. These results demonstrate that glycerol can replace water and be used as a solvent in spray processes to make cathode powders, promising a new environmentally-friendly synthesis route for battery powder materials production.

中文翻译：

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使用甘油作为溶剂，来自喷雾干燥和火焰辅助喷雾热解的高保留率 NCA 阴极粉末

摘要 本文报道了使用简单的火焰辅助喷雾热解 (FSP) 和喷雾干燥 (SD) 工艺合成 LiNi0.8Co0.15Al0.05O2 (NCA) 正极粉末，其中金属盐前体溶解在甘油中用于喷雾. X 射线衍射证实 NCA 粉末具有层状结构，具有低级的阳离子混合。电子显微镜显示，FSP 生产的颗粒比 SD 生产的颗粒具有相对较小的尺寸和更光滑的表面。来自 FSP 工艺的 NCA 粉末在 0.1C 下的电压范围为 3.0-4.3 V 时具有 200.2 mAh/g 的初始放电容量。它在 200 次循环后显示出非常好的容量保持率，1C 时为 91.5%，5C 时为 89.4%。这些结果表明甘油可以代替水并在喷涂工艺中用作溶剂来制造阴极粉末，