Abstract In this work, the binder-free CC@g-C3N4–900 electrode is prepared through coating graphite carbon nitride (g-C3N4) nanosheets onto the flexible substrate of carbon cloth (CC) by a facile strategy. The CC@g-C3N4–900 electrode delivers a remarkable specific capacitance (499 F g−1 at 1 A g−1), an excellent rate capability (292 F g−1 at 20 A g−1) and outstanding cyclic performance (capacitance loss of only 4.4% after 10,000 cycles). The symmetric supercapacitor device based on CC@g-C3N4–900 exhibits decent energy density at ultrahigh power density (10.1 Wh kg−1 at 10000 W kg−1), and superb cyclic performance (without capacitance reduction after 10,000 cycles). The superior electrochemical performance of the CC@g-C3N4–900 electrode can be ascribed to its self-supported binder-free character, high nitrogen doping and strong coupling between CC and g-C3N4 nanosheets, which results in a small charge transfer resistance, highly stable electrode structure and remarkable pseudocapacitance.

中文翻译：

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碳布支撑石墨氮化碳纳米片作为超级电容器的高级无粘合剂电极

摘要 在这项工作中，通过简单的策略将石墨氮化碳 (g-C3N4) 纳米片涂覆到碳布 (CC) 的柔性基底上，制备了无粘合剂 CC@g-C3N4-900 电极。CC@g-C3N4-900 电极具有显着的比电容（1 A g-1 时为 499 F g-1）、优异的倍率性能（20 A g-1 时为 292 F g-1）和出色的循环性能（ 10,000 次循环后电容损失仅为 4.4%）。基于 CC@g-C3N4-900 的对称超级电容器器件在超高功率密度（10.1 Wh kg-1 10000 W kg-1）下表现出不错的能量密度，以及出色的循环性能（10,000 次循环后电容不会降低）。CC@g-C3N4-900 电极的优异电化学性能可归因于其自支撑无粘合剂特性，