Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6601885 | Electrochimica Acta | 2018 | 29 Pages |
Abstract
Crystallinity and surface areas play important roles on the energy storage performances of electroactive materials. Herein, a Ni-based metal-organic framework (MCF-35) is employed as the template to fabricate hierarchical Ni(OH)2 for supercapacitor applications. By careful controlling of reaction time and pH of the reaction media, the crystallinity and surface areas of prepared Ni(OH)2 could be tuned and an optimizing structure with balanced crystalline and surface area could be obtained. Such a structure offers high electrochemical active sites and efficient pathways for ion migration and electron transportation. Thus, a remarkable and excellent capacity of 250.6â¯mAâ¯hâ¯gâ1 (2255â¯Fâ¯gâ1) at a current density of 0.5â¯Aâ¯gâ1 is achieved. Meanwhile, using active carbon and the optimized Ni(OH)2 as electrodes, a hybrid supercapacitor is fabricated which exhibits an energy density of 42.54â¯Whâ¯kgâ1 at the power density of 370.8â¯Wâ¯kgâ1.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Zhenyu Xiao, Ben Xu, Shiyu Zhang, Zhendong Yang, Yingjie Mei, Weidong Fan, Minghui Zhang, Liangliang Zhang, Daofeng Sun,