Abstract Having a wider potential window and higher stability than other traditional sp2-based carbon electrodes, heavily boron-doped diamond (BDD) electrode with three-dimensional porous nanostructure can considerably enhance the specific capacitance, making it one of the most promising electrode materials. In the work, we present a simple and reproducible method to create such a porous BDD film by using self-assembly seeding approach and microwave plasma chemical vapor deposition (MPCVD). The fabricated porous BDD electrode exhibits an enhanced capacitance of 17.18 mF cm−2, and an outstanding stability of about 95% charge retention after 10000 cycles in aqueous solution in three-electrode system. Moreover, the specific capacitance can be further enhanced by producing multilayer films. By using porous BDD as electrodes, a 2.6 V aqueous symmetric supercapacitor with specific capacitance of 25.48 mF cm−2 is obtained. The capacitance retention is about 91.5% after 10000 CV cycles. The energy and power densities of the device are about 5.46 Wh kg−1 and 2.9 kW kg−1, respectively. The fabrication of this porous BDD film with high capacitance and high stability is free of template, binder, as well as etching process, which may have potential impact on many applications for future energy storage devices.

中文翻译：

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通过金刚石纳米颗粒的再生长，基于多孔硼掺杂金刚石的高性能 2.6 V 水对称超级电容器

摘要 具有比其他传统sp2基碳电极更宽的电位窗口和更高的稳定性，具有三维多孔纳米结构的重硼掺杂金刚石（BDD）电极可以显着提高比电容，使其成为最有前途的电极材料之一。在这项工作中，我们提出了一种简单且可重复的方法，通过使用自组装接种方法和微波等离子体化学气相沉积 (MPCVD) 来制造这种多孔 BDD 膜。制备的多孔 BDD 电极显示出 17.18 mF cm-2 的增强电容，以及在三电极体系中水溶液 10000 次循环后约 95% 的出色稳定性。此外，通过生产多层薄膜可以进一步提高比电容。通过使用多孔 BDD 作为电极，a 2. 获得比电容为 25.48 mF cm-2 的 6 V 水对称超级电容器。10000 次 CV 循环后电容保持率约为 91.5%。该装置的能量和功率密度分别约为 5.46 Wh kg-1 和 2.9 kW kg-1。这种具有高电容和高稳定性的多孔 BDD 薄膜的制造无需模板、粘合剂和蚀刻工艺，这可能对未来储能设备的许多应用产生潜在影响。