当前位置: X-MOL 学术Adv. Energy Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Inverted Design for High‐Performance Supercapacitor Via Co(OH)2‐Derived Highly Oriented MOF Electrodes
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2017-11-27 , DOI: 10.1002/aenm.201702294
Ting Deng 1 , Yue Lu 2 , Wei Zhang 1, 3 , Manling Sui 2 , Xiaoyuan Shi 1 , Dong Wang 1 , Weitao Zheng 1
Affiliation  

Metal organic frameworks (MOFs) are considered as promising candidates for supercapacitors because of high specific area and potential redox sites. However, their shuffled orientations and low conductivity nature lead to severely‐degraded performance. Designing an accessibly‐manipulated and efficient method to address those issues is of outmost significance for MOF application in supercapacitors. It is the common way that MOFs scarify themselves as templates or precursors to prepare target products. But to reversely think it, using target products to prepare MOF could be the way to unlock the bottleneck of MOFs' performance in supercapacitors. Herein, a novel strategy using Co(OH)2 as both the template and precursor to fabricate vertically‐oriented MOF electrode is proposed. The electrode shows a double high specific capacitance of 1044 Fg−1 and excellent rate capability compared to MOF in powder form. An asymmetric supercapacitor was also fabricated, which delivers a maximum energy density of 28.5 W h kg−1 at a power density of 1500 W kg−1, and the maximum of 24000 W kg−1 can be obtained with a remaining energy density of 13.3 W h kg−1. Therefore, the proposed strategy paves the way to unlock the inherent advantages of MOFs and also inspires for advanced MOF synthesis with optimum performance.

中文翻译:

通过Co(OH)2衍生的高度取向的MOF电极实现高性能超级电容器的反向设计

金属有机骨架(MOF)由于具有高的比表面积和潜在的氧化还原位点而被认为是超级电容器的有前途的候选者。但是,它们的打乱方向和低导电性会导致性能严重下降。设计一种可操作且有效的方法来解决这些问题,对于MOF在超级电容器中的应用至关重要。MOF经常将其自己作为模板或前体以制备目标产品的方式来消除。但是反过来说,使用目标产品准备MOF可能是释放MOF在超级电容器中性能瓶颈的方法。在这里,一种使用Co(OH)2的新策略因为提出了制造垂直取向MOF电极的模板和前体。与粉末形式的MOF相比,该电极显示出1044 Fg -1的两倍高比电容,并且具有出色的倍率能力。还制造了不对称超级电容器,该超级电容器在1500 W kg -1的功率密度下可提供28.5 W h kg -1的最大能量密度,而在剩余能量密度为13.3的情况下可获得最大24000 W kg -1的能量。 W h公斤-1。因此,所提出的策略为释放MOF的固有优势铺平了道路,也为具有最佳性能的先进MOF合成提供了灵感。
更新日期:2017-11-27
down
wechat
bug