Layered manganese-based metal-organic framework as a high capacity electrode material for supercapacitorsElectronic supplementary information (ESI) available: TGA curve and 3D view of Mn-LMOF, as well as the IR spectra, XRD patterns and the additional electrochemical data of Mn-LMOF electrode. See DOI: 10.1039/c7ra04374k

• Main Authors: Wang, Xianmei, Liu, Xiuxiu, Rong, Hongren, Song, Yidan, Wen, Hao, Liu, Qi
• Format: Journal Article
• Language: English
• Published: 07-06-2017
• ISSN: 2046-2069
• DOI: 10.1039/c7ra04374k

For the development of supercapacitors with higher energy densities, metal-organic frameworks (MOFs), as electrode materials for supercapacitors, have attracted much attention. Herein, layered manganese-based MOF ([Mn(tfbdc)(4,4′-bpy)(H
2
O)
2
], Mn-LMOF; H
2
tfbdc = 2,3,5,6-tetrafluoroterephthalic acid, 4,4′-bpy = 4,4′-bipyridine) was synthesized by a simple solution reaction and evaluated as an electrode material for supercapacitors for the first time. The Mn-LMOF electrode showed a high specific capacitance, a good cycling stability and a improved rate capability. Its maximum specific capacitances were 1098 F g
−1
for 1 M KOH and 1178 F g
−1
for 1 M LiOH solutions at a current density of 1 A g
−1
. The specific capacitance retention was maintained at 92.6% after 2000 cycles in 1 M KOH, slightly lower than that in 1 M LiOH. The excellent supercapacitive performance may be ascribed to the nature of Mn-LMOF, containing a layered structure and nano-sized particles.
The layered Mn-based metal-organic framework (Mn-LMOF) displayed good performance as an electrode material for supercapacitors.