A copper-based layered coordination polymer: synthesis, magnetic properties and electrochemical performance in supercapacitors

Abstract

A copper-based layered coordination polymer ([Cu(hmt)(tfbdc)(H2O)]; hmt = hexamethylenetetramine, tfbdc = 2,3,5,6-tetrafluoroterephthalate; Cu-LCP) has been synthesized, and it has been structurally and magnetically characterized. The Cu-LCP shows ferromagnetic interactions between the adjacent copper(II) ions. Density functional theory calculations on the special model of Cu-LCP support the occurrence of ferromagnetic interactions. As an electrode material for supercapacitors, Cu-LCP exhibits a high specific capacitance of 1274 F g(-1) at a current density of 1 A g(-1) in 1 M LiOH electrolyte, and the capacitance retention is about 88% after 2000 cycles.

Layered Structural Co‐Based MOF with Conductive Network Frames as a New Supercapacitor Electrode

“…Liu et al. also prepared a layer‐structured Cu‐MOF, which delivered a high specific capacitance of 1274 F g −1 with a capacitance retention of about 88 % after 2000 cycles . Very recently, a layered Co‐MOF was evaluated as a supercapacitor electrode material and exhibited a maximum specific capacitance of 2474 F g −1 at 1 A g −1 .…”

“…To date, more than 30 kindso fp ristine MOFs,s uch as Zn-, [17,18] Co-, [19][20][21][22][23][24] Ni-, [25][26][27][28] Zr-, [29] In-, [30] Mn-, [31] Fe-, [32] Cu-, [33] Cdbased, [34] and so on MOFs, have been investigated fors uperca-pacitor applications. Among them, the layer-structured MOFs had become one of the most studiedm aterials in recent years.…”

“…[26] In addition, Wen et al [27] reported the synthesis of Ni-MOF/ carbonn anotube (CNT) composites, which showedabetter performance.L iu et al also prepared al ayer-structured Cu-MOF,w hich delivered ah igh specific capacitance of 1274Fg À1 with ac apacitance retention of about8 8% after2 000 cycles. [33] Very recently,alayered Co-MOF was evaluated as as upercapacitor electrodem ateriala nd exhibitedamaximum specific capacitance of 2474 Fg À1 at 1Ag À1 . [22] Overall, although these MOF materials have good electrochemical performances due to their redox-actives peciesa nd interlayer structure, the number of the related reports is still limited until now.T he present research has indicatedt hat the supercapacitivep erformances of these materials are directly related to their own structured characteristics.…”

Vertically co-oriented two dimensional metal-organic frameworks for packaging enhanced supercapacitive performance

“…However, the low conductivity of MOFs hinders their straightforward application. Tremendous efforts towards solving this issue have resulted in the design of improved MOFs, such as metal-ion based MOFs [12][13][14][15][16] and other composite materials 17 . In spite of such success stories, on typical substrates MOF crystals grow in random orientations, which strongly reduces specific areas, limits the effective permeation of electrolytes to electrochemical surfaces, and lowers the overall utilization of the MOF active sites.…”

Poly[6‐(2,6‐bis(1′‐methylbenzimidazolyl)pyridin‐4‐yloxy)hexyl acrylate] (PBIP) and its terbium (III) complex (PBIP‐Tb3+): Homopolymerization, optical, and magnetic performance

“…Organic magnetic materials have been explored intensively in recent decades owing to low relative density, good magnetic performance, structural variability and easy processing. They are widely used as micro‐wave absorption materials, high frequency devices, and high density storage materials . Among organic magnetic materials, polymeric metal complexes are mainly studied because of their simple synthesis, various ligands and diverse coordinated modes and their magnetism comes from the long range ordering of unpaired electrons through spin‐spin interactions …”