High-performance energy storage systems are becoming essential to cope with the possible energy crisis in the future. Herein, unique hierarchical B-Co₄N have been reasonably designed and synthesized on Ni foam (NF) via a typical chemical reduction strategy. The successful realization of B-doping engineering effectively facilitates ion and electron transport, adding the electrochemically reactive sites, which endow the B-Co₄N-20/NF electrode with high specific capacity (817.9 C g⁻¹ at 1 A g⁻¹), excellent rate capability (maintained about 90.9% at 10 A g⁻¹) and cycling stability (about 93.06% retention of the initial capacity after 5000 cycles). The corresponding hybrid supercapacitor assembled with B-Co₄N-20/NF electrodes has an energy density of 25.85 W h kg⁻¹ at the power density of 800.2 W kg⁻¹ and a long cycle life (98.59% retention ratio after 5000 cycles). These remarkable properties indicate that the doping of heteroatom and the construction of hierarchical structure will provide a favorable reference for the performance promotion of next-generation energy storage devices.

中文翻译：

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通过B掺杂改性的Co4N，用于高性能混合超级电容器。

高性能储能系统对于应对未来可能出现的能源危机变得至关重要。这里，唯一层级B-钴₄ n具有被设计合理，在Ni泡沫（NF）中合成通过典型的化学还原策略。成功地实现B-掺杂工程的有效促进离子和电子传输，在添加电化学反应性位点，其赋予B-钴₄ N-20 / NF具有高比容量（817.9 C g还电极^-1 1 A G ^-1），极好的速率能力（在10 A g ^-1时保持约90.9％）和循环稳定性（5000次循环后保留约93.06％的初始容量）。组装有B-Co ₄ N-20 / NF电极的相应混合超级电容器在800.2 W kg ^-1的功率密度下的能量密度为25.85 W h kg ^-1，循环寿命长（5000次循环后保留率为98.59％） ）。这些非凡的特性表明，杂原子的掺杂和层次结构的构建将为下一代储能装置的性能提升提供有利的参考。