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Green Fabrication of Ultrathin Co3O4 Nanosheets from Metal–Organic Framework for Robust High-Rate Supercapacitors
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-11-21 00:00:00 , DOI: 10.1021/acsami.7b10309
Zhenyu Xiao 1 , Lili Fan 1 , Ben Xu 1 , Shanqing Zhang 2 , Wenpei Kang 1 , Zixi Kang 1 , Huan Lin 1 , Xiuping Liu 1 , Shiyu Zhang 1 , Daofeng Sun 1
Affiliation  

Two-dimensional cobalt oxide (Co3O4) is a promising candidate for robust electrochemical capacitors with high performance. Herein, we use 2,3,5,6-tetramethyl-1,4-diisophthalate as a recyclable ligand to construct a Co-based metal–organic framework of UPC-9, and subsequently, we obtain ultrathin hierarchical Co3O4 hexagonal nanosheets with a thickness of 3.5 nm through a hydrolysis and calcination process. A remarkable and excellent specific capacitance of 1121 F·g–1 at a current density of 1 A·g–1 and 873 F·g–1 at a current density of 25 A·g–1 were achieved for the as-prepared asymmetric supercapacitor, which can be attributed to the ultrathin 2D morphology and the rich macroporous and mesoporous structures of the ultrathin Co3O4 nanosheets. This synthesis strategy is environmentally benign and economically viable due to the fact that the costly organic ligand molecules are recycled, reducing the materials cost as well as the environmental cost for the synthesis process.

中文翻译:

金属-有机骨架用于耐用高速率超级电容器的绿色超薄Co 3 O 4纳米片的绿色制备

二维氧化钴(Co 3 O 4)是高性能高性能鲁棒电化学电容器的有希望的候选者。在本文中,我们使用2,3,5,6-四甲基-1,4-二间苯二甲酸酯作为可回收配体,构建了UPC-9的Co基金属有机骨架,随后,我们获得了超薄分层Co 3 O 4六角形通过水解和煅烧过程形成厚度为3.5 nm的纳米片。在1 A·g –1的电流密度下具有1121 F·g –1的卓越且优异的比电容,在25 A·g –1的电流密度下具有873 F·g –1的比电容制备的不对称超级电容器获得了成功,这可以归因于超薄的Co 3 O 4纳米片的超薄二维形态和丰富的大孔和中孔结构。由于回收了昂贵的有机配体分子,从而降低了材料成本以及合成过程的环境成本,因此该合成策略在环境上是无害的,并且在经济上可行。
更新日期:2017-11-21
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