Supercapacitors with high power density and durability have shown enormous potential for smart electronics. Herein, a novel graphitic carbon nitride (g-C₃N₄) coated with oxygen vacancies-rich ZnO (OZCN) nanocomposites was prepared from zeolitic imidazolate framework precursor by direct thermal decomposition melamine in air. The as-prepared OZCN nanocomposites exhibited high capacitive performance (3,000 F g^-1 at 3 A g^-1) and excellent cycling stability due to the synergetic effect of g-C₃N₄ and oxygen vacancies-rich ZnO. Additionally, the assembled asymmetric supercapacitor displayed an energy density of 100.9 Wh kg^-1, while the capacitance retention remained at 86.2% even after 1,000 cycles at 7 A g^-1. This study is highlighting a new way for designing metal oxide electrode possessing excellent electronic properties for durable and low-cost energy storage devices.

具有高功率密度和耐用性的超级电容器已显示出智能电子产品的巨大潜力。在此，通过在空气中直接热分解三聚氰胺，由沸石咪唑酸酯骨架前驱体制备了涂覆有富氧空缺的ZnO（OZCN）纳米复合材料的新型石墨氮化碳（gC ₃ N ₄）。所制备的纳米复合材料OZCN显示出高电容的性能（3000 F G ^-1在3A克^-1由于GC的协同作用）和优异的循环稳定性₃ Ñ _4个富含空位和氧的ZnO。此外，组装的不对称超级电容器的能量密度为100.9 Wh kg ^-1，即使在7 A g ^-1下经过1000次循环后，电容保持率仍保持在86.2％。这项研究突显了一种设计具有耐用和低成本储能设备优良电子性能的金属氧化物电极的新方法。