Composite Fe3O4-MXene-Carbon Nanotube Electrodes for Supercapacitors Prepared Using the New Colloidal Method

Liang, Wenyu; Zhitomirsky, Igor

doi:10.3390/ma14112930

Cited by 15 publications

(4 citation statements)

References 65 publications

(82 reference statements)

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“…The increase in capacitance during the first 200 cycles can be attributed to morphology changes during cycling. A similar increase in capacitance during initial cycling due to internal electrode microstructure changes was observed in other materials [46][47][48][49]. The capacitance decreased after about 1000 cycles, the capacitance retention after 3000 cycles was 81%.…”

Section: Resultssupporting

confidence: 76%

Magnetic CuFe2O4 Nanoparticles with Pseudocapacitive Properties for Electrical Energy Storage

2022

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This investigation is motivated by increasing interest in the development of magnetically ordered pseudocapacitors (MOPC), which exhibit interesting magnetocapacitive effects. Here, advanced pseudocapacitive properties of magnetic CuFe2O4 nanoparticles in negative potential range are reported, suggesting that CuFe2O4 is a promising MOPC and advanced negative electrode material for supercapacitors. A high capacitance of 2.76 F cm−2 is achieved at a low electrode resistance in a relatively large potential window of 0.8 V. The cyclic voltammograms and galvanostatic charge–discharge data show nearly ideal pseudocapacitive behavior. Good electrochemical performance is achieved at a high active mass loading due to the use of chelating molecules of ammonium salt of purpuric acid (ASPA) as a co-dispersant for CuFe2O4 nanoparticles and conductive multiwalled carbon nanotube (MCNT) additives. The adsorption of ASPA on different materials is linked to structural features of ASPA, which allows for different interaction and adsorption mechanisms. The combination of advanced magnetic and pseudocapacitive properties in a negative potential range in a single MOPC material provides a platform for various effects related to the influence of pseudocapacitive/magnetic properties on magnetic/pseudocapacitive behavior.

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Section: Resultssupporting

confidence: 76%

Magnetic CuFe2O4 Nanoparticles with Pseudocapacitive Properties for Electrical Energy Storage

2022

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“…Summary of electrochemical performance of Ti 3 C 2 T x /Fe 3 O 4 -based composite anode for supercapacitors. References [49,61,62] are cited in Supplementary Materials.…”

Section: Discussionmentioning

confidence: 99%

“…In method 1, the synthesis procedure for Fe 3 O 4 was similar to that described in a previous investigation [49]. Fe 3 O 4 particles were precipitated from a solution containing Fe 2+ and Fe 3+ in a molar ratio of 1:2 at a temperature of 50 • C by adding 2 M NH 4 OH for pH adjustment to pH = 9.…”

Section: Synthesis Of Composite Materialsmentioning

confidence: 99%

Multifunctional MXene–Fe3O4–Carbon Nanotube Composite Electrodes for High Active Mass Asymmetric Supercapacitors

Liang

Nawwar³

et al. 2023

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Ti3C2Tx–Fe3O4–carbon nanotube composites were prepared for electrochemical energy storage in the negative electrodes of supercapacitors. The electrodes show a remarkably high areal capacitance of 6.59 F cm−2 in a neutral Na2SO4 electrolyte, which was obtained by the development of advanced nanofabrication strategies and due to the synergistic effect of the individual components. Enhanced capacitance was achieved using the in-situ synthesis method for the Fe3O4 nanoparticles. The superparamagnetic behavior of the Fe3O4 nanoparticles facilitated the fabrication of electrodes with a reduced binder content. Good mixing of the components was achieved using a celestine blue co-dispersant, which adsorbed on the inorganic components and carbon nanotubes and facilitated their co-dispersion and mixing. The capacitive behavior was optimized by the variation of the electrode composition and mass loading in a range of 30–45 mg cm−2. An asymmetric device was proposed and fabricated, which contained a Ti3C2Tx–Fe3O4–carbon nanotube negative electrode and a polypyrrole–carbon nanotube positive electrode for operation in an Na2SO4 electrolyte. The asymmetric supercapacitor device demonstrated high areal capacitance and excellent power-density characteristics in an enlarged voltage window of 1.6 V. This investigation opens a new avenue for the synthesis and design of MXene-based asymmetric supercapacitors for future energy storage devices.

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“…[20] Hollow and porous structures bring more scattering and reflection sites, resulting in the enhanced MA. [21] However, the traditional preparation method focused on the electrostatic adsorption [22,23] and vacuum-assisted filtration, [24,25] which cannot effectively control the morphology of composite. The weak connection and high contact resistance between Ti 3 C 2 T x and CNTs also hinder the extended application.…”

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confidence: 99%

Hierarchical Ti₃C₂T_x MXene/Carbon Nanotubes Hollow Microsphere with Confined Magnetic Nanospheres for Broadband Microwave Absorption

Zhang

et al. 2021

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structure and chemical variety endow MXene with many attractive properties such as high intrinsic conductivity, large specific surface, high electron mobility, mechanical stability, abundant surface functional groups, and defects. [10] However, it is urgent to ameliorate the excessive permittivity and conductivity of MXene, promoting it to be competitive and promising microwave absorbers.To solve serious electromagnetic pollution radiated out from high-power popularized 5G commutation network, MA have been attracted extensive interest. [11] Characteristic impedance matching becomes a key issue responsible for high microwave energy attenuation capacity. MXene with 2D anisotropy holds powerful potential as the lightweight MA material due to its relatively low percolation threshold. [12] However, restricted by the excessive conductivity and permittivity, MXene obtains improper impedance matching and thereby weak microwave absorbing property. [13] Dielectric property engineering through compositing [14][15][16] and heterojunction design [17,18] have been widely applied to address the above obstacles. The bi-components with specially designed interfaces can effectively manage the dielectric property in terms of conduction and polarization behavior, such as, Ti 3 C 2 T x MXene/carbon nanotubes (CNTs). [19] Besides, the design of the microstructure plays an important role in the improvement of impedance matching and microwave performance. Constructing 2D nanosheets into 3D hierarchical network is an effective method to provides the larger specific surface area and higher porosity. [20] Hollow and porous structures bring more scattering and reflection sites, resulting in the enhanced MA. [21] However, the traditional preparation method focused on the electrostatic adsorption [22,23] and vacuum-assisted filtration, [24,25] which cannot effectively control the morphology of composite. The weak connection and high contact resistance between Ti 3 C 2 T x and CNTs also hinder the extended application. [26] Dielectric-magnetic synergy is also an effective strategy to achieve appropriate impedance matching of MA material. [27][28][29] Magnetized MXene hybrid materials enhance microwave attenuation by the synergistic effect of dielectric dissipation and Hierarchical hollow structure with unique interfacial properties holds great potential for microwave absorption (MA). Ti 3 C 2 T x MXene has been a hot topic due to rich interface structure, abundant defects, and functional groups. However, its overhigh permittivity and poor aggregation-resistance limit the further application. Herein, a hierarchical MXene-based hollow microsphere is prepared via a facile spray drying strategy. Within the microsphere, few-layered MXene nanosheets are separated by dispersed carbon nanotubes (CNTs), exposing abundant dielectric polarization interfaces. Besides, numerous magnetic Fe 3 O 4 nanospheres are uniformly dispersed and confined within nano-cavities between 1D network and 2D framework. Such a novel structure simultaneously promotes interfaci...

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Composite Fe3O4-MXene-Carbon Nanotube Electrodes for Supercapacitors Prepared Using the New Colloidal Method

Cited by 15 publications

References 65 publications

Magnetic CuFe2O4 Nanoparticles with Pseudocapacitive Properties for Electrical Energy Storage

Magnetic CuFe2O4 Nanoparticles with Pseudocapacitive Properties for Electrical Energy Storage

Multifunctional MXene–Fe3O4–Carbon Nanotube Composite Electrodes for High Active Mass Asymmetric Supercapacitors

Hierarchical Ti₃C₂T_x MXene/Carbon Nanotubes Hollow Microsphere with Confined Magnetic Nanospheres for Broadband Microwave Absorption

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Composite Fe3O4-MXene-Carbon Nanotube Electrodes for Supercapacitors Prepared Using the New Colloidal Method

Cited by 15 publications

References 65 publications

Magnetic CuFe2O4 Nanoparticles with Pseudocapacitive Properties for Electrical Energy Storage

Magnetic CuFe2O4 Nanoparticles with Pseudocapacitive Properties for Electrical Energy Storage

Multifunctional MXene–Fe3O4–Carbon Nanotube Composite Electrodes for High Active Mass Asymmetric Supercapacitors

Hierarchical Ti3C2Tx MXene/Carbon Nanotubes Hollow Microsphere with Confined Magnetic Nanospheres for Broadband Microwave Absorption

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Hierarchical Ti₃C₂T_x MXene/Carbon Nanotubes Hollow Microsphere with Confined Magnetic Nanospheres for Broadband Microwave Absorption