超级电容器
材料科学
电极
复合数
电化学
咪唑酯
电流密度
纳米技术
沸石咪唑盐骨架
包层(金属加工)
化学工程
复合材料
金属有机骨架
化学
物理
有机化学
物理化学
量子力学
吸附
工程类
作者
Dingbang Liu,Zhongkai Wu,Na Zhan,Zihao Wang,Yilin Peng,Mingyang Li,Zijian Li,Zihao Huang,Fei Gao,Zhenzhi Cheng,Weiping Zhou,Guangshen Luo
标识
DOI:10.1016/j.est.2023.109158
摘要
Ferrite, a class of transition metal oxides, has emerged as a promising material for electrochemical energy storage due to its cost-effectiveness and high theoretical capacity. However, the tendency of ferrite to agglomerate hinders its practical application. Here, we report a facile method to fabricate CoFe2O4@Co3O4 flower-like sphere and form a unique core-shell structure. In this composite, flake Co3O4 pile up to form shell which cladding the CoFe2O4 core. Crumpled shell provide ultra-high specific surface area (128.54 m2/g) to expose more electrochemical active sites, benefiting effective electrons transfer. As a result, the optimized flower-like spherical structure electrode exhibited an exceptionally high capacity of 2834 F g−1 at a current density of 1 A g−1. Additionally, the electrode demonstrated outstanding rate capability, retaining 78 % of its capacity at a current density of 10 A g−1.
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