Development of 3D-Printed MWCNTs/AC/BNNTs Ternary Composite Electrode Material with High-Capacitance Performance

Activated carbon (AC) and multiwalled carbon nanotubes (MWCNTs) have been extensively investigated in recent decades as electrical double-layer capacitor (EDLC) electrode materials for supercapacitors, owing to their superior capacitive properties and cycling stability performance. However, in the modern electronics industry, ternary electrode materials have been designed to develop high-performance and efficient energy storage devices. EDLC-based ternary materials are of great importance, where all the present components participate both individually and as a multicomponent electrode system to promote high-electrochemical performance electrode materials. In this study, we have incorporated an optimized content of boron nitride nanotube (BNNT) powder into a binary material composed of AC and MWCNTs to enhance their electrochemical performance using a pneumatic printer. The printed MWCNTs/AC/BNNTs ternary composite electrode material has shown a maximum specific capacitance of 262 F g−1 at a minimum current density of 1 A g−1, with a capacitance retention of 49.61% at a maximum current density of 10 A g−1. These results demonstrate that the printable MWCNTs/AC/BNNTs ternary composite electrode material is a potential candidate for the development of high-performance supercapacitors.

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Nickel Cobalt Hydroxides With Tunable Thin-layer Nanosheets for High-performance Supercapacitor Electrode

10.21203/rs.3.rs-149158/v1 ◽

2021 ◽

Author(s):

Luomeng Zhang ◽

Hui Xia ◽

Shaobo Liu ◽

Yishan Zhou ◽

Yuefeng Zhao ◽

...

Keyword(s):

Thin Layer ◽

Specific Capacitance ◽

Current Density ◽

Layered Double Hydroxides ◽

High Performance ◽

Electrode Materials ◽

Supercapacitor Electrode ◽

Nickel Cobalt ◽

Capacitance Performance ◽

Double Hydroxides

Abstract Layered double hydroxides as typical supercapacitor electrode materials can perform superior energy storage if the structures are well regulated. In this work, a simple one-step hydrothermal method is used to prepare diverse nickel cobalt layered double hydroxides (NiCo-LDHs), in which the different contents of urea are used to synthesize the different nanostructures of NiCo-LDHs. The results show that the decrease in urea content can effectively improve the dispersibility of NiCo-LDHs, adjust the thickness of materials and optimize the internal pore structures, thereby enhancing the capacitance performance of NiCo-LDHs. When the content of urea is reduced from 0.03 g to 0.0075 g under a fixed precursor materials mass ratio of nickel (0.06 g) to cobalt (0.02 g) of 3:1, the prepared sample NiCo-LDH-1 exhibits the thickness of 1.62 nm, and the clear thin-layer nanosheets structures and a large number of surface pores are formed, which is beneficial to the transmission of ions into the electrode material. After being prepared as a supercapacitor electrode, the NiCo-LDH-1 displays an ultra-high specific capacitance of 3982.5 F g-1 under the current density of 1 A g-1, and high capacitance retention above 93.6% after 1000 cycles of charging and discharging at a high current density of 10 A g-1. The excellent electrochemical performance of NiCo-LDH-1 is proved by assembling two-electrode asymmetric supercapacitor with carbon spheres, displaying the specific capacitance of 95 F g-1 at 1 A g-1 and the capacitance retention with 78% over 1000 cycles. As a result, it offers a facile way to control the nanostructure of NiCo-LDHs, confirms the important affection of urea on enhancing capacitive performance for supercapacitor electrode and provides the high possibility for the development of high-performance supercapacitors.

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Effect of Reaction Time on the Performance of Co3O4 Electrode Materials for High Performance Supercapacitors

Journal of Nanoelectronics and Optoelectronics ◽

10.1166/jno.2020.2883 ◽

2020 ◽

Vol 15 (12) ◽

pp. 1429-1435

Author(s):

Yan Zhao ◽

Yucai Li ◽

Dong Zhang ◽

Shiwei Song ◽

Jian Wang ◽

...

Keyword(s):

Reaction Time ◽

Electrochemical Performance ◽

Current Density ◽

High Performance ◽

Electrode Materials ◽

Structural Characteristics ◽

High Specific Capacitance ◽

High Porosity ◽

Excellent Electrochemical Performance ◽

Hydrothermal Approach

Electrochemical performance of the material depends on the morphology and structural characteristics of the material. Co3O4 samples shows the remarkable electrochemical performance owing to the high porosity, appropriate pore size distribution and novel architecture and reaction time effect of morphology. In this work, Co3O4 nanowires grown on Ni foam have been synthesized through a facile hydrothermal approach, revealing large capacitance of 2178.4 mF cm-2 at the current density of 2 mA cm-2 and cycling stability with 79.6% capacitance retention after 6000 cycles. The as-assembled device delivers excellent electrochemical performance for high specific capacitance of 356 mF cm-2 at the current density of 2 mA cm-2 and high cycle stability.

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Partially Graphitized Iron-Carbon Hybrid Composite as Electrochemical Supercapacitor Material

10.26434/chemrxiv.11369673 ◽

2020 ◽

Author(s):

Sai Rashmi M. ◽

Ashish Singh ◽

Chandra sekhar Rout ◽

Akshaya Samal ◽

Manav Saxena

Keyword(s):

Iron Oxide ◽

Current Density ◽

Electrode Material ◽

High Performance ◽

Electrode Materials ◽

Carbon Composite ◽

X Ray ◽

Transmission Electron ◽

Excellent Property ◽

A Current

The conversion of biomass into valuable carbon composites as an efficient non-precious energy storage electrode material have elicited extensive research interest. As synthesized partially graphitized iron oxide-carbon composite material (Fe3O4/Fe3C@C) shows an excellent property as an electrode material for supercapacitor. X-ray diffraction, High resolution transmission electron microscopy, X-ray photo-electron spectroscopy and Brunauer-Emmett-Teller analysis is used to study the structural, compositional and surface areal properties. The electrode material shows a specific surface area of 827.4 m2/g. Due to the synergistic effect of graphitic layers with iron oxide/carbide, Fe3O4/Fe3C@C hybrid electrode materials display high-performance for supercapacitor with excellent capacity of 878 F/g at a current density of 5A/g (3-electrode) and 211.6 F/g at a current density of 0.4A/g (2-electrode) in 6M KOH electrolyte with good cyclic stability.

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Study on Preparation and Properties of Novel Ti/Cu Laminated Composite Electrode Materials

Journal of New Materials for Electrochemical Systems ◽

10.14447/jnmes.v19i2.333 ◽

2016 ◽

Vol 19 (2) ◽

pp. 077-083

Author(s):

Han Zhaohui ◽

Zhu Peixian ◽

Zhou Shenggang ◽

Guo Yuzhong ◽

Yang Yi

Keyword(s):

Composite Material ◽

Electrochemical Performance ◽

Electrode Material ◽

Composite Electrode ◽

Electrode Materials ◽

Pure Titanium ◽

Base Material ◽

Laminated Composite ◽

Diffusion Welding ◽

Material Structure

This paper starts with the structure design of the electrode base material, Ti/Cu electrode material instead of single metal Ti as the base material which was prepared by hot diffusion welding, the change of composite material structure is influences on electrochemical properties of Ti/Cu that was analyzed by SEM, electrochemical workstation and so on. The results show that the design changes of matrix structure of traditional Ti electrode is good for enhance the electrochemical performance of electrode, due to the design of layered composite structure was used, the inner Cu of composite material is current collector electrode and conductive channel carrier , it reduces the resistivity of the electrode material (its resistivity is only 1/15 of pure titanium electrode material) and improves the electrical conductivity of the electrode, in order to realize the uniformity of the current in the electrode, the electrochemical performance of the electrode was improved for the novel Ti/Cu laminated composite electrode materials.

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Facile synthesis of a α-MoO3 nanoplate/TiO2 nanotube composite for high electrochemical performance

RSC Advances ◽

10.1039/c7ra01164d ◽

2017 ◽

Vol 7 (37) ◽

pp. 22983-22989 ◽

Cited By ~ 9

Author(s):

Shupei Sun ◽

Xiaoming Liao ◽

Yu Sun ◽

Guangfu Yin ◽

Yadong Yao ◽

...

Keyword(s):

Electrochemical Performance ◽

Electrode Material ◽

High Performance ◽

Composite Electrode ◽

Tio2 Nanotube ◽

Electrodeposition Technique ◽

Facile Synthesis ◽

Supercapacitor Applications

A novel α-MoO3/TiO2 composite electrode material for high performance supercapacitor applications was synthesized using a facile electrodeposition technique.

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Nickel–Cobalt Hydroxides with Tunable Thin-Layer Nanosheets for High-Performance Supercapacitor Electrode

Nanoscale Research Letters ◽

10.1186/s11671-021-03543-w ◽

2021 ◽

Vol 16 (1) ◽

Author(s):

Luomeng Zhang ◽

Hui Xia ◽

Shaobo Liu ◽

Yishan Zhou ◽

Yuefeng Zhao ◽

...

Keyword(s):

Thin Layer ◽

Specific Capacitance ◽

Current Density ◽

Layered Double Hydroxides ◽

High Performance ◽

Electrode Materials ◽

Supercapacitor Electrode ◽

Nickel Cobalt ◽

Capacitance Performance ◽

Double Hydroxides

AbstractLayered double hydroxides as typical supercapacitor electrode materials can exhibit superior energy storage performance if their structures are well regulated. In this work, a simple one-step hydrothermal method is used to prepare diverse nickel–cobalt layered double hydroxides (NiCo-LDHs), in which the different contents of urea are used to regulate the different nanostructures of NiCo-LDHs. The results show that the decrease in urea content can effectively improve the dispersibility, adjust the thickness and optimize the internal pore structures of NiCo-LDHs, thereby enhancing their capacitance performance. When the content of urea is reduced from 0.03 to 0.0075 g under a fixed precursor materials mass ratio of nickel (0.06 g) to cobalt (0.02 g) of 3:1, the prepared sample NiCo-LDH-1 exhibits the thickness of 1.62 nm, and the clear thin-layer nanosheet structures and a large number of surface pores are formed, which is beneficial to the transmission of ions into the electrode material. After being prepared as a supercapacitor electrode, the NiCo-LDH-1 displays an ultra-high specific capacitance of 3982.5 F g−1 under the current density of 1 A g−1 and high capacitance retention above 93.6% after 1000 cycles of charging and discharging at a high current density of 10 A g−1. The excellent electrochemical performance of NiCo-LDH-1 is proved by assembling two-electrode asymmetric supercapacitor with carbon spheres, displaying the specific capacitance of 95 F g−1 at 1 A g−1 with the capacitance retention of 78% over 1000 cycles. The current work offers a facile way to control the nanostructure of NiCo-LDHs, confirms the important affection of urea on enhancing capacitive performance for supercapacitor electrode and provides the high possibility for the development of high-performance supercapacitors.

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High Performance Supercapacitor Electrode Materials Based on Activated Carbon and Conducting Polypyrrole

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.645-646.1150 ◽

2015 ◽

Vol 645-646 ◽

pp. 1150-1155 ◽

Cited By ~ 1

Author(s):

Wen Tao Yuan ◽

Ya Jie Yang ◽

Yong Long Qiu ◽

Jian Hua Xu ◽

Wen Yao Yang ◽

...

Keyword(s):

Activated Carbon ◽

Synergistic Effect ◽

Electrochemical Performance ◽

High Performance ◽

Composite Electrode ◽

Electrode Materials ◽

Uniform Structure ◽

Discharge Process ◽

Supercapacitor Electrode ◽

Supercapacitor Electrode Materials

The traditional supercapacitor is made of activated carbon, which shows lower specific capacity and higher resistance. In this paper, we demonstrated preparation of high performance supercapacitor electrode materials based on activated carbon and conducting polymer polypyrrole (ppy). In order to obtain well dispersion of ppy in activated carbon for lower resistance of electrode, a high-speed agate beads milling process was used to mix the ppy and porous carbon powder. By controlling the synergistic effect between ppy and activated carbon, a uniform structure composite electrode was prepared and the performance of this composite based supercapacitor was investigated. Compared with pure activated electrode, the obvious electrochemical performance improvement was achieved in composite electrode after the introduction of ppy. It has been found that electrode based on this composite has a maximum specific capacitance about 159 F/g, which was higher than pure activated carbon, and exhibited low resistance about 3.35 Ohm. The cycle performance results revealed that a 142 F/g (more than 88% of initial capacitance) capacitance was kept in composite electrode after 1000 cycles charge/discharge process. We conclude that the excellent synergistic effect between activated carbon and ppy resulted in superior electrochemical performance of composite electrode. Furthermore, the simple preparing method of composite electrode for supercapacitor assembly has potential commercial applications.

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Facile synthesis and characterization of the Mn-MOF electrode material for flexible supercapacitors

Journal of Electrochemical Energy Conversion and Storage ◽

10.1115/1.4053246 ◽

2021 ◽

pp. 1-19

Author(s):

Yanhong Liu ◽

Jiahong Liu ◽

Yijun Cao ◽

Wei Shang ◽

Ning Peng ◽

...

Keyword(s):

Current Density ◽

Electrode Material ◽

High Performance ◽

Electrode Materials ◽

Metal Organic Frameworks ◽

Charge Transfer Resistance ◽

Carbon Cloth ◽

Flexible Electrode ◽

Transfer Resistance ◽

Metal Organic

Abstract Metal-organic frameworks (MOFs) due to their porosity and well-defined structures are considered to be very promising electrode materials for the construction of high-performance supercapacitor. In this paper, manganese-based metal organic frameworks (Mn-MOF) were prepared on the surface of carbon cloth (CC) by hydrothermal method. The morphology and structure of the electrode material were characterized by SEM, XRD, FT-IR, and XPS. Its electrochemical studies show that the Mn-MOF electrode materials exhibit low charge transfer resistance, the excellent specific capacitance of 433.5 mF·cm−2 in 1.0 M Na2SO4 aqueous solution at the current density of 0.8 mA·cm−2. It is noteworthy that the flexible electrode has excellent cycle stability and 105% capacitance retention even after 5000 cycles at a current density of 5 mA·cm−2. The high electrochemical performance of Mn-MOF/CC flexible electrode materials can be attributed to its three-dimensional porous structure.

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