To address the longstanding issue of conventional supercapacitors, viz. their energy and power deliveries are largely attenuated by the poor packing density of particularly the active electrodes, an ultracompact yet porous monolithic electrode is put forward in the present study. Particularly, it is built on electroactive α′-Na_xV₂O₅ with the areal mass loading amounting to 33.24 mg cm⁻² densely packed into a 330-μm-thick carbon cloth and more importantly, with a hierarchical meso-/nano-pore structure in favor of the ion transport throughout this 330 μm-thick α′-Na_xV₂O₅/CC heavy electrode. In such context, a series of superior performances including the areal, gravimetric and volumetric capacitances reaching 12.47 F cm⁻², 375.2 F g⁻¹ and 377.93 F cm⁻³, and the energy and power densities amounting to 1.38 mW h cm⁻² and 34.1 mW cm⁻² are successfully delivered by this compact monolith at the electrode- and device-level, respectively, altogether outperforming significantly those of additional modern and promising electrodes and energy storage devices reported in the literature.

中文翻译：

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330μm厚的NaxV2O5 / CC整体电极通过分级孔隙结构和超高质量负载的协同作用而达到基准电容性能。

为了解决传统超级电容器的长期问题，即。它们的能量和功率传递由于特别是活性电极的较差的堆积密度而大大减弱，本研究提出了一种超紧凑而多孔的整体式电极。特别地，它是建立在电α'钠_X V ₂ ø ₅与面积质量负载金额为33.24毫克厘米^-2密集成330微米厚的碳布和更重要的是，具有分级内消旋- /纳米有利于离子迁移的-pore结构贯穿该330微米厚的α'钠_X V ₂ ø ₅/ CC重电极。在这种情况下，一系列的性能优越，包括的面积，重量和体积电容达到12.47˚F厘米^-2，375.2 F G ^-1和377.93˚F厘米^-3，且能量和功率密度达1.38毫瓦高厘米^-2这种紧凑的整体结构分别在电极级和器件级成功地实现了34.1 mW cm ^-2的传输，其性能明显优于文献中报道的其他现代和有前途的电极和储能器件。