MXene titanium carbide synthesized by hexagonal titanium aluminum carbide with high specific capacitance and low impedance

Electrode materials with a high specific capacitance, outstanding reversibility and excellent cycle stability are constantly pursued for supercapacitors. In this paper, we present an approach to improve the electrochemical performance by combining the advantages of both inorganic and organic. Ni-MnO2/PANi-co-PPy composites are synthesized, with the copolymer of aniline/pyrrole being coated on the surface of Ni-doped manganese dioxide nanospheres. The inorganic–organic composite enables a substantial increase in its specific capacitance and cycle stability. When the mass ratio of Ni-MnO2 to aniline and pyrrole mixed monomer is 1:5, the composite delivers high specific capacitance of 445.49[Formula: see text]F/g at a scan rate of 2[Formula: see text]mV/s and excellent cycle stability of 61.65% retention after 5000 cycles. The results indicate that the Ni-MnO2/PANi-co-PPy composites are promising electrode materials for future supercapacitors application.

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Effect of redox additive in aqueous electrolyte on the high specific capacitance of cation incorporated MnCo2O4@Ni(OH)2 electrode materials for flexible symmetric supercapacitor

Composites Part B Engineering ◽

10.1016/j.compositesb.2021.108755 ◽

2021 ◽

pp. 108755

Author(s):

Prakas Samanta ◽

Souvik Ghosh ◽

Naresh Chandra Murmu ◽

Tapas Kuila

Keyword(s):

Specific Capacitance ◽

Electrode Materials ◽

Aqueous Electrolyte ◽

High Specific Capacitance ◽

Symmetric Supercapacitor

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Pressureless sintering and mechanical properties of titanium aluminum carbide

Materials Letters ◽

10.1016/j.matlet.2007.09.005 ◽

2008 ◽

Vol 62 (10-11) ◽

pp. 1480-1483 ◽

Cited By ~ 25

Author(s):

Shinobu Hashimoto ◽

Masaru Takeuchi ◽

Koji Inoue ◽

Sawao Honda ◽

Hideo Awaji ◽

...

Keyword(s):

Mechanical Properties ◽

Aluminum Carbide ◽

Pressureless Sintering ◽

Titanium Aluminum ◽

Titanium Aluminum Carbide

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Fabrication of polyaniline functionalized titanium carbide nanocomposite supercapacitor for high specific capacitance and high energy density applications

Journal of Polymer Research ◽

10.1007/s10965-021-02766-w ◽

2021 ◽

Vol 28 (11) ◽

Author(s):

Anuradha Samadhiya ◽

Pukhrambam Dipak ◽

Ritu Dubey ◽

Dinesh Chandra Tiwari ◽

Udai Pratap Vermac

Keyword(s):

Energy Density ◽

Titanium Carbide ◽

Specific Capacitance ◽

High Specific Capacitance ◽

High Energy ◽

High Energy Density

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Novel Electrode Materials for Ultracapacitors:Structural and Electrochemical Properties of Sol-Gel-Derived Manganese Dioxide Thin Films

MRS Proceedings ◽

10.1557/proc-575-415 ◽

1999 ◽

Vol 575 ◽

Cited By ~ 3

Author(s):

Suh-Cern Pang ◽

MarcA Anderson

Keyword(s):

Thin Films ◽

Specific Capacitance ◽

Electrode Materials ◽

Sol Gel ◽

High Specific Capacitance ◽

Potential Range ◽

Proton Mobility ◽

Reversible Redox ◽

Sol Gel Process ◽

Nickel Substrates

ABSTRACTNanoparticulate MnO2thin films fabricated by the sol-gel process have been shown to be an outstanding novel electrode material for Ultracapacitors. The average specific capacitance of sol-gel-derived MnO2thin-films on nickel substrates as determined by cyclic voltammetry ranged from 566 to 698 F/g. These films also exhibited good cycling stability within the potential range of 0.0-0.9V (vs SCE) in unbuffered aqueous electrolyte. Both CV and XPS studies showed that MnO2films have remained chemically and structurally intact after 1,500 cycles. The XRD spectra and SEM micrographs showed that the microstructure of MnO2thin films are highly porous, and poorly crystalline or amorphous in nature. The high specific capacitance of MnO2may be predominantly due to pseudocapacitance associated with homogenous and reversible redox reactions of proton insertion into and out of the MnO2lattice. Any variation in the microstructure and thickness of films might affect proton mobility within the oxide matrix and thereby affecting their cycling behaviors. Further optimization of the cycling behaviors is envisaged with better microstructural and thickness control of these sol-gelderived nanoparticulate MnO2thin films.

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Three dimensional iron oxide/graphene aerogel hybrids as all-solid-state flexible supercapacitor electrodes

RSC Advances ◽

10.1039/c6ra11106h ◽

2016 ◽

Vol 6 (64) ◽

pp. 58994-59000 ◽

Cited By ~ 47

Author(s):

Abdul Muqsit Khattak ◽

Huajie Yin ◽

Zahid Ali Ghazi ◽

Bin Liang ◽

Azhar Iqbal ◽

...

Keyword(s):

Iron Oxide ◽

Solid State ◽

Specific Capacitance ◽

Electrode Materials ◽

Three Dimensional ◽

High Specific Capacitance ◽

Graphene Aerogel ◽

Flexible Supercapacitor

Three dimensional iron oxide/graphene aerogel hybrid (Fe2O3/GA) was synthesized and used as electrode materials in flexible supercapacitor devices, which show high specific capacitance of 440 F g−1 with 89% capacitance retention after 2200 cycles.

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A Facile Synthesis of NiFe2O4 with High Specific Capacitance as Supercapacitor Electrode Material

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.281.854 ◽

2018 ◽

Vol 281 ◽

pp. 854-858

Author(s):

Xi Cheng Gao ◽

Jian Qiang Bi ◽

Wei Li Wang ◽

Guo Xun Sun ◽

Xu Xia Hao ◽

...

Keyword(s):

Particle Size ◽

Specific Capacitance ◽

Electrochemical Property ◽

Electrode Materials ◽

High Specific Capacitance ◽

Constant Current ◽

X Ray Diffraction ◽

Supercapacitor Electrode ◽

Constant Current Charge ◽

Supercapacitor Electrode Materials

NiFe2O4 powders were synthesized by a facile hydrothermal method at 180°C followed by a thermal treatment at 300°C. The phase composition and morphology were analyzed by X-ray diffraction (XRD) and scanning electron microscope (SEM). The results showed that the NiFe2O4 powders were well-crystallized, and they possessed a particle size in the range of 50-100 nm. The electrochemical property was characterized via cyclic voltammetry (CV) and constant current charge-discharge method. Encouragingly, the NiFe2O4 powders had an excellent electrochemical property, whose specific capacitance reached 266.84 F/g at the electric current density of 1 A/g due to the small particle size. Compared with other Fe-based metal compound oxides, NiFe2O4 has a better electrochemical performance, which can be widely used in the supercapacitor electrode materials.

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Electrode Materials for Supercapacitors: A Review of Recent Advances

Catalysts ◽

10.3390/catal10090969 ◽

2020 ◽

Vol 10 (9) ◽

pp. 969

Author(s):

Parnia Forouzandeh ◽

Vignesh Kumaravel ◽

Suresh C. Pillai

Keyword(s):

Electrochemical Properties ◽

Specific Capacitance ◽

Electrode Materials ◽

Electronic Device ◽

High Energy ◽

High Energy Density ◽

Storage Mechanism ◽

Hybrid Supercapacitors ◽

Discharge Rates ◽

Redox Active

The advanced electrochemical properties, such as high energy density, fast charge–discharge rates, excellent cyclic stability, and specific capacitance, make supercapacitor a fascinating electronic device. During recent decades, a significant amount of research has been dedicated to enhancing the electrochemical performance of the supercapacitors through the development of novel electrode materials. In addition to highlighting the charge storage mechanism of the three main categories of supercapacitors, including the electric double-layer capacitors (EDLCs), pseudocapacitors, and the hybrid supercapacitors, this review describes the insights of the recent electrode materials (including, carbon-based materials, metal oxide/hydroxide-based materials, and conducting polymer-based materials, 2D materials). The nanocomposites offer larger SSA, shorter ion/electron diffusion paths, thus improving the specific capacitance of supercapacitors (SCs). Besides, the incorporation of the redox-active small molecules and bio-derived functional groups displayed a significant effect on the electrochemical properties of electrode materials. These advanced properties provide a vast range of potential for the electrode materials to be utilized in different applications such as in wearable/portable/electronic devices such as all-solid-state supercapacitors, transparent/flexible supercapacitors, and asymmetric hybrid supercapacitors.

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Hierarchical Dendritic Polypyrrole with High Specific Capacitance for High-performance Supercapacitor Electrode Materials

Journal of New Materials for Electrochemical Systems ◽

10.14447/jnmes.v20i4.449 ◽

2017 ◽

Vol 20 (4) ◽

pp. 197-204

Author(s):

Weiliang Chen ◽

Shuhua Pang ◽

Zheng Liu ◽

Zhewei Yang ◽

Xin Fan ◽

...

Keyword(s):

Specific Capacitance ◽

Current Density ◽

High Performance ◽

Electrode Materials ◽

High Specific Capacitance ◽

Chemical Oxidation ◽

Channel Structure ◽

Supercapacitor Electrode ◽

Infrared Spectrometer ◽

A Current

Polypyrrole with hierarchical dendritic structures assembled with cauliflower-like structure of nanospheres, was synthesized by chemical oxidation polymerization. The structure of polyryrrole was characterized by Fourier transform infrared spectrometer and scanning electron microscopy. The electrochemical performance was performed on CHI660 electrochemical workstation. The results show that oxalic acid has a significant effect on morphology of PPy products. The hierarchical dendritic PPyOA(3) electrodes possess a large specific capacitance as high as 744 F/g at a current density of 0.2 A/g and could achieve a higher specific capacitance of 362 F/g even at a current density of 5.0 A/g. Moreover, the dendritic PPy products produce a large surface area on the electrode through the formation of the channel structure with their assembled cauliflower-like morphology, which facilitates the charge/electron transfer relative to the spherical PPy electrode. The spherical dendritic PPyOA(3) electrode has 58% retention of initial specific capacitance after 260 cycles. The as-prepared dendritic polypyrrole with high performance is a promsing electrode material for supercapacitor.

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