Abstract Recently, lithium‐ion batteries have reached the limit of low reversible capacity that is deficient for uses in emerging electric devices for mobiles and electric vehicles (EVs). In this work, we have prepared polygonal-stacked Cu2O (PCO) through modified Benedict's reaction by simply controlling concentrations of cetyltrimethylammonium bromide (CTAB). The synthesized PCO materials featuring sharp tip structure showed enhanced capacity than round edge structured PCO. Surface area and structural difference could play critical roles in the electrochemical performances of the PCO materials. Among three different structured Cu2O materials, sharp tip shaped PCO electrode exhibited a high discharge capacity of ca. 402 mAh/g at the 2nd cycle and its discharge capacity appeared to gradually increase to ca. 506 mAh/g up to the 100th cycle. The diffusion coefficient of sharp tip shaped PCO was also larger than PCO with round-structured morphology. The simple synthesis strategy for the resulting unique electrode morphology can allow to understand morphology effects on anode materials for lithium-ion batteries.

中文翻译：

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表面活性剂 – 可控合成多边形堆叠 Cu2O 对锂离子电池负极性能的形态影响

摘要 最近，锂离子电池已经达到了低可逆容量的极限，这对于用于移动和电动汽车 (EV) 的新兴电子设备来说是不够的。在这项工作中，我们通过简单地控制十六烷基三甲基溴化铵 (CTAB) 的浓度，通过改良的本尼迪克特反应制备了多边形堆叠的 Cu2O (PCO)。具有尖锐尖端结构的合成 PCO 材料显示出比圆边结构 PCO 更高的容量。表面积和结构差异可能在 PCO 材料的电化学性能中起关键作用。在三种不同结构的 Cu2O 材料中，尖尖形 PCO 电极表现出约 在第 2 次循环时为 402 mAh/g 并且其放电容量似乎逐渐增加到大约。506 mAh/g 直到第 100 次循环。尖尖形 PCO 的扩散系数也大于具有圆形结构形态的 PCO。由此产生的独特电极形态的简单合成策略可以了解形态对锂离子电池负极材料的影响。