Abstract Self-assembled cactus-like NH4V3O8 is prepared through polyethylene glycol (PEG)-assisted hydrothermal synthesis method. The samples are characterized by X-ray diffraction and scanning electron microscopy techniques. Adjusting the pH value of the solution can effectively control the morphology of NH4V3O8. The electrochemical measurements indicate that the sample which pH value is 3.7, shows the best cycling performance. It delivers an initial discharge capacity is 228 mAh g−1 and maintains at 156 mAh g−1 under 15 mA g−1 after 50 cycles. The proposed synthetic method can also be developed to address other electrode materials with inferior electronic conductivity and lithium ion diffusion.

中文翻译：

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聚乙二醇（PEG）辅助合成用于锂离子电池正极的自组装仙人掌状NH4V3O8

摘要 采用聚乙二醇（PEG）辅助水热合成法制备了自组装仙人掌状NH4V3O8。样品通过 X 射线衍射和扫描电子显微镜技术进行表征。调节溶液的pH值可以有效控制NH4V3O8的形貌。电化学测量表明，pH值为3.7的样品表现出最好的循环性能。它提供的初始放电容量为 228 mAh g-1，并在 50 次循环后在 15 mA g-1 下保持在 156 mAh g-1。所提出的合成方法也可以用于解决其他具有较差电子导电性和锂离子扩散的电极材料。