Abstract Suitable electrode materials play a decisive role in the performance of supercapacitors. In recent years, transition metal nitrides come into view because of their advantages of superior electrical conductivity exceeding the corresponding metal oxides and higher specific capacitance compared with carbon-based materials. Herein, we have successfully synthesized the binder-free Co3N thin films for high-efficiency supercapacitor by reactive magnetron sputtering. Remarkedly, the Co3N thin film electrodes can reach a high specific capacity of 47.5 mC cm−2 at a current density of 1.0 mA cm−2 along with reasonable cycling stability (78.1% remaining after 10,000 cycles). These findings have proved that the Co3N thin films have great potential applications for supercapacitors or other electrochemical energy storage devices.

中文翻译：

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用于高性能超级电容器的独立式 Co3N 薄膜

摘要 合适的电极材料对超级电容器的性能起着决定性的作用。近年来，过渡金属氮化物因其优于相应金属氧化物的导电性和比碳基材料更高的比电容等优点而受到关注。在此，我们通过反应磁控溅射成功合成了用于高效超级电容器的无粘合剂 Co3N 薄膜。值得注意的是，Co3N 薄膜电极可以在 1.0 mA cm-2 的电流密度下达到 47.5 mC cm-2 的高比容量以及合理的循环稳定性（10,000 次循环后剩余 78.1%）。这些发现证明了 Co3N 薄膜在超级电容器或其他电化学储能装置方面具有巨大的潜在应用。