文献类型：期刊文献

英文题名：Controllable transformation of CoNi-MOF-74 on Ni foam into hierarchical-porous Co(OH)2/Ni(OH)2 micro-rods with ultra-high specific surface area for energy storage

作者：Zhou, Jiao-Jiao[1,2];Ji, Wuxing[1];Xu, Le[1,2];Yang, Yang[1];Wang, Wanqing[1];Ding, Hualong[1];Xu, Xicheng[1];Wang, Weiwei[1];Zhang, Peilin[1];Hua, Zile[2];Chen, Luyang[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, State Key Lab High Performance Ceram & Superfine, Shanghai Inst Ceram, Shanghai 200050, Peoples R China

年份：2022

卷号：428

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20213610860092);WOS:【SCI-EXPANDED(收录号:WOS:000729970800007)】；

基金：This work was supported by the National Natural Science Foundation of China (51502092) , the Fundamental Research Funds for the Central Universities (JKD01211601, 222201718002) , the Thousand Talents Program Young Project in China, and the Program for Eastern Scholar at Shanghai Institutions of Higher Learning (TP2015028) .

语种：英文

外文关键词：Supercapacitors; Metal-organic framework; Co(OH)(2)/Ni(OH)(2); CoNi-MOF-74

摘要：Thanks to the rich porosity, high specific surface area and tunable components, MOFs-derived hydroxides have become outstanding electrode materials for supercapacitors. According to an ion etching/exchange reaction method, the self-sacrifice template of CoNi-MOF-74 micro-rods that anchored on Ni foam are controllably transformed into a series of composites of Co(OH)(2)/Ni(OH)(2) with specific structure. They are nanoflakes-wrapped solid micro-rods (CoNi-2), nanoflakes self-assembled micro-rods (CoNi-6) and nanoflakes self-assembled micro-tubes (CoNi-12), respectively. Among them, the CoNi-2 demonstrates the largest BET surface area (208.8 m(2)/g) and the highest areal capacitance (16.3 F/cm(2) at 2 mA/cm(2)), exhibiting the most promising electrochemical energy storage ability. A corresponding asymmetric supercapacitor (CoNi-2//AC) delivers high energy density of 0.5 mWh/cm(2) at power density of 1.6 mW/cm(2) and excellent cycling stability (86.6 % capacitance retention after 10 000 cycles at 50 mA/cm(2)). Moreover, an all-solid-state asymmetric supercapacitor successfully lighten a light-emitting diode (LED) for one minute, implying great potential for practical applications in energy storage.