Metal–Organic Framework‐Derived Co₃V₂O₈@CuV₂O₆ Hybrid Architecture as a Multifunctional Binder‐Free Electrode for Li‐Ion Batteries and Hybrid Supercapacitors

Abstract

Particularly, in lithium (Li)-ion battery (LIB) and supercapacitor (SC) applications, surface area and porosity properties of MOFs boost electrolyte uptake capability and shorten diffusion length. [4] Furthermore, the nanoscale voids in the MOF matrix alleviate severe volume fluctuations while performing electrochemical reactions. [5] Owing to these properties, the research community has been focused on the development of MOF-based/derived active materials to explore their applicability in the energy storage field. For instance, Shuai Nan Guo et al. prepared MOF-polyaniline sandwich-like composite using a successive oil bath method and carbonization, followed by polymerization. The as-prepared material demonstrated a maximum specific capacitance of 477 F g −1 at a current density of 1 A g −1. [6] Recently, Xueying Cao et al. synthesized the cobaltdoped Cu-MOF/Cu 2+1 O material, and investigated its SC performance. At a current density of 2 mA cm −2 , the prepared hybrid material delivered a superior specific capacitance of 518.50 F g −1. [7] In another report, Danni Shao et al. achieved a maximum specific capacitance of 414.50 F g −1 at 0.50 A g −1 from the high nitrogen (N)-contained Co-MOF nanorods. [8] Very recently, Zhuo Li et al. fabricated a 3D interconnected architecture with MOF-derived metal oxides (Fe 2 O 3 , ZnO) and N-doped carbon nanofibers. The prepared composite material was explored as an anode in LIB. At 50 mA g −1 , the composite material delivered a high initial specific capacity of 1571.40 mAh g −1. [9] In the other literature, Shiji Hao et al. employed a zeolitic imidazolate framework-67 as a template to synthesize the Co 3 S 2 nanoparticles-incorporated N-doped carbon particles for use as an anode material in LIB. The resulted material demonstrated a superior specific capacity of 950 mAh g −1 at 0.20 C. [10] Therefore, designing the MOFbased/derived electrode materials would be an inciting strategy to achieve exalted energy storage performance. On the other hand, electrode materials are the key components of energy storage systems and are predominantly responsible for energy storage performance. To date, several transition metal oxides have been synthesized and their electrochemical behavior was investigated in LIB and SC studies. [11] Compared Metal-organic frameworks (MOFs) are promising materials in diverse fields because of their constructive traits of varied structural topologies, high porosity, and high surface area. MOFs are also an ideal precursor/template to derive porous and functional morphologies. Herein, Co 3 V 2 O 8 nanohexagonal prisms are grafted on CuV 2 O 6 nanorod arrays (CuV-CoV)-grown copper foam (CF) using solution-processing methods, followed by thermal treatment. Direct preparation of active material on CF can potentially eliminate electrochemically inactive and non-conductive binders, leading to improved charge-transfer rate. Furthermore, solution-processing methods are simple and cost-effective. Owing to versatile valence states and good redox activity, the vanadium...

ZIF-67 Derived Co2VO4 Hollow Nanocubes for High Performance Asymmetric Supercapacitors

“…Studies have shown that ternary metal oxides exhibit excellent electrochemical performance when used as supercapacitor electrode materials through the redox reaction between two different metal cations and the synergy between them [ 6 , 7 , 8 ]. As a transition metal element, vanadium has the characteristics of multivalent state (+2–+5) and easily deformable V-O polyhedron, which in turn produces a large amount of vanadium oxide compounds (M x V y O z ) [ 9 , 10 ]. The introduction of different types of metal ions M to M x V y O z can show different electrochemical properties, which provides a large number of options for the study of supercapacitors electrode materials [ 11 ].…”

MXene-drivenin situconstruction of hollow core-shelled Co3V2O8@Ti3C2Txnanospheres for high-performance all-solid-state asymmetric supercapacitors

“…21,22 Furthermore, vanadium-based materials possess a relatively high chemical stability during the long-term chargestorage process because the binding force between vanadium and oxygen is very strong, while the oxidation state of vanadium is hard to convert to zero valence (vanadium metal). 23,24 In particular, Co 3 V 2 O 8 , as one kind of cobalt vanadate, features the typical crystalline structure related to a Kagome-staircase geometry and thus charge-storage superiority, leading to increased interest for its application in batteries and supercapacitors. 21,22 Fahimi et al synthesized a Co 3 V 2 O 8 hollow spheres cathode for supercapacitors, which showed a great specic capacity of 2376 F g −1 at 2 A g −1 and steady cycling performance.…”

“…25 Sekhar et al reported one metal-organic framework-derived Co 3 V 2 O 8 @CuV 2 O 6 nanorod composite, which exhibited excellent electrochemical properties in a lithium-ion battery (1089.3 mA h g −1 at 500 mA g −1 ) and supercapacitor (464.70 mF cm −2 at 4 mA cm −2 ). 24 As mentioned above, it would be meaningful to combine Ti 3 C 2 T x MXene with Co 3 V 2 O 8 by projecting the structure and components in order to acquire a much higher capacity and prolonged cycling stability. Ti 3 C 2 T x MXene bears high electron conductivity, excellent hydrophilicity, and mechanical exibility, which allow it to act as a preferable conductive matrix when coupled with a transition metal oxide to facilitate electron/ion transport at the contact interface.…”

“…25 Sekhar et al reported one metal–organic framework-derived Co 3 V 2 O 8 @CuV 2 O 6 nanorod composite, which exhibited excellent electrochemical properties in a lithium-ion battery (1089.3 mA h g −1 at 500 mA g −1 ) and supercapacitor (464.70 mF cm −2 at 4 mA cm −2 ). 24…”

Metal‐Organic Frameworks Derived Titanium Oxides via Soft Interface Adaptive Transformation

“…[1][2][3][4] A plenty of MOFs-derived nanostructures such as carbon materials, [5][6][7][8] metal oxides, [9][10][11] metal chalcogenides, [12][13][14] and metal phosphides [15][16][17] have been fabricated. Among these derivatives, MOFs derived metal oxides (MMOs) have shown promising potentials in various applications, for example, electrocatalysis, [10,11] photocatalysis, [18,19] batteries, [20,21] and supercapacitors [9,22,23] A variety of MMOs have been fabricated with controlled nanostructures (e.g., hollow particles) by changing the calcination conditions (e.g., temperature, heating rate, atmosphere). [24][25][26][27][28][29][30][31][32][33][34] However, the direct calcination strategy is not applicable to all MOFs to prepare their corresponding MMOs with controllable morphologies, especially those with highly crystalline structures.…”