Abstract 3D lion's mane like AlV3O9 microspheres deposited on the well-exfoliated graphene were successfully synthesised through a facile solvothermal method where the graphene sheet was prepared solely via the liquid phase exfoliation process. The highly electrical conductive graphene was introduced as a conductive substrate or a backbone to support the diffusion of the electrolyte ions (OH−). In order to achieve the optimum electrochemical performance, graphene/AlV3O9 nanocomposites with different weight ratios were fabricated wherein G-5AlV possessed an exceptional charge storage ability which surpasses that of other nanocomposites. The G-5AlV sample was found to possess a magnificent specific capacitance of 551.72 F∙g−1 at 0.5 A∙g−1 and achieve a remaining capacitance of 468.97 F∙g−1 as the current density was increased. After 5000 continuous intercalation/de-intercalation processes, G-5AlV delivered a specific capacitance of 441.38 F∙g−1 and a coulombic efficiency of 95%, confirming its remarkable cycling stability and coulombic efficiency. More importantly, it exhibits good energy and power densities as a symmetric supercapacitor, further suggesting itself as a potential candidate for use in high-performance charge storage devices.

中文翻译：

---

三维狮子鬃毛如 AlV3O9 沉积在石墨烯表面用于超级电容器，具有良好的电化学性能

摘要 通过简单的溶剂热法成功地合成了沉积在剥离良好的石墨烯上的 3D 狮子鬃毛状 AlV3O9 微球，该方法仅通过液相剥离工艺制备石墨烯片。引入高导电石墨烯作为导电基材或骨架以支持电解质离子 (OH-) 的扩散。为了获得最佳电化学性能，制备了不同重量比的石墨烯/AlV3O9 纳米复合材料，其中 G-5AlV 具有优于其他纳米复合材料的卓越电荷存储能力。发现 G-5AlV 样品在 0.5 A∙g−1 时具有 551.72 F∙g−1 的惊人比电容，并且随着电流密度的增加，剩余电容为 468.97 F∙g−1。经过 5000 次连续的嵌入/脱嵌过程，G-5AlV 提供了 441.38 F∙g-1 的比电容和 95% 的库仑效率，证实了其卓越的循环稳定性和库仑效率。更重要的是，它作为对称超级电容器表现出良好的能量和功率密度，进一步表明它是用于高性能电荷存储设备的潜在候选者。