Carbon-based supercapacitors are highly regarded for their high specific power and long cycle life. However, they often face the challenge of low specific energy and difficulty in simultaneously improving both specific energy and specific power. In this study, a high-performance composite electrode was prepared using the cross-section of bamboo as raw material, followed by KOH activation, in-situ growth of ZIF-67, and carbonization. The bamboo-derived porous carbon showed significant improvement in performance indicators such as specific capacitance and energy density. Electrochemical characterization in a three-electrode system showed that at a current density of 1 mA cm, our composite electrode material achieved a peak specific capacitance of 24.7 F cm. When assembled into a symmetric supercapacitor, it can provide an energy density of 1.00 mWh cm at a power density of 2.49 mW cm. Notably, at a substantial current density of 30 mA cm, the electrode maintained a capacitance retention of 96.2 % after 10,000 cycles. These results not only highlight the potential of bamboo-derived porous carbon but also point to a broad avenue for the preparation of energy storage devices by combining MOFs with bamboo.

中文翻译：

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竹模板 MOF-67 衍生碳：超级电容器的高性能电极


碳基超级电容器因其高比功率和长循环寿命而备受推崇。然而，它们往往面临比能量低、难以同时提高比能量和比功率的挑战。本研究以竹材截面为原料，经KOH活化、ZIF-67原位生长、碳化制备了高性能复合电极。竹源多孔碳在比电容和能量密度等性能指标上表现出显着改善。三电极系统的电化学表征表明，在1 mA cm的电流密度下，我们的复合电极材料实现了24.7 F cm的峰值比电容。当组装成对称超级电容器时，它可以在2.49 mW cm的功率密度下提供1.00 mWh cm的能量密度。值得注意的是，在 30 mA cm 的大电流密度下，该电极在 10,000 次循环后仍保持 96.2% 的电容保持率。这些结果不仅凸显了竹源多孔碳的潜力，而且还为将MOF与竹子结合来制备储能装置指明了广阔的途径。