Liu Guangjun, Yu Xiaoyang, Zhou Fei, Yan Keling, Yin Lanrui, Zhuang Changfu, Wang Ying, Tian Di
Key Laboratory of National Forestry and Grassland Administration on Highly-Efficient Utilization of Forestry Biomass Resources in Southwest, Southwest Forestry University, Kunming 650024, P. R. China.
Key Laboratory of National Forestry and Grassland Administration on Highly-Efficient Utilization of Forestry Biomass Resources in Southwest, Southwest Forestry University, Kunming 650024, P. R. China.
J Colloid Interface Sci. 2025 Jan 15;678(Pt C):120-133. doi: 10.1016/j.jcis.2024.09.074. Epub 2024 Sep 10.
In this paper, a 2 dimensional (2D) metal-organic frameworks (MOFs) nanosheets grown on 1D ZIF-67 modified carbon nanofibers (CNFs) was designed and fabricated with a hierarchical heterostructure. The hierarchical 2D/1D MOFs/CCNF offers rich electrochemical active sites and favorable ion/electron diffusion pathways. The synergistic effect of Co, CNFs and MOFs from heterostructures contributes to superb electrochemical activities. Benefiting from the hierarchical heterostructures optimized by the mass ratio of ZIF-67/PAN and CCNF/NiMOF as well as the type of substrates, CCNF-20@MOF showed a specific capacity of 361.50 C g at 0.5 A g, whose charge storage mechanism is dominated by diffusion control. Meanwhile, a bamboo-derived carbon material (BBC) was designed in the solid-state asymmetric supercapacitor (CCNF-20@MOF//BBC). The device exhibited an energy density of 38.89 Wh kg at the power density of 800.02 W kg and excellent cycling stability, that exceed many MOFs based devices. Moreover, it could be successfully used for LED light-emitting, demonstrating a good application prospect. This work provides a feasible strategy for the improved performance of MOFs and CNFs based materials in the field of energy storage.
本文设计并制备了一种在一维ZIF-67修饰的碳纳米纤维（CNFs）上生长的二维（2D）金属有机框架（MOFs）纳米片，具有分级异质结构。分级二维/一维MOFs/CCNF提供了丰富的电化学活性位点和良好的离子/电子扩散途径。异质结构中Co、CNFs和MOFs的协同作用有助于实现卓越的电化学活性。受益于通过ZIF-67/PAN和CCNF/NiMOF的质量比以及基底类型优化的分级异质结构，CCNF-20@MOF在0.5 A g下表现出361.50 C g的比容量，其电荷存储机制以扩散控制为主。同时，在固态非对称超级电容器（CCNF-20@MOF//BBC）中设计了一种竹衍生碳材料（BBC）。该器件在800.02 W kg的功率密度下表现出38.89 Wh kg的能量密度和优异的循环稳定性，超过了许多基于MOFs的器件。此外，它可以成功用于发光二极管发光，展示了良好的应用前景。这项工作为提高基于MOFs和CNFs的材料在储能领域的性能提供了一种可行的策略。
