Bamboo-templated bimetallic MOF-derived thick carbon electrodes for supercapacitors

Metal–organic framework-derived porous carbons show promising potential as high-loading electrode materials for supercapacitors, while achieving efficient ion transport and conductivity remains a key challenge. In this work, a binder-free ZnCo bimetallic MOF-derived bamboo carbon (ZnCoBC) was fabricated through a one-step growth and carbonization strategy. The optimized ZnCoBC1000-5 exhibits a high specific surface area of 1385.49 m 2 g − 1 and a mesoporous volume of 0.51 cm 3 g − 1 , confirming a well-developed hierarchical pore network. Electrochemical measurements demonstrate that ZnCoBC1000-5 maintains stable CV and GCD profiles within 5–30 mA cm − 2 , reflecting efficient charge transport and reversibility. The assembled symmetric device delivers a volumetric energy density of 6.46 mWh cm − 3 , while retaining 97.1% capacitance after 10,000 cycles, indicating excellent durability. This work highlights the structural advantages of bimetallic MOF-derived carbon bamboo and provides meaningful insight for designing high-performance energy-storage electrodes.