Biocatalytic approach as alternative to chemical synthesis of polyaniline/carbon nanotube composite with enhanced electrochemical properties

RSC Advances ◽  
2016 ◽  
Vol 6 (65) ◽  
pp. 60372-60375 ◽  
Author(s):  
Grigory V. Otrokhov ◽  
Galina P. Shumakovich ◽  
Maria E. Khlupova ◽  
Irina S. Vasil'eva ◽  
Igor B. Kaplan ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Chemical Synthesis ◽  
Electrochemical Properties ◽  
Specific Capacitance ◽  
High Specific Capacitance ◽  
Cycling Stability ◽  
High Conductivity ◽  
Carbon Nanotube Composite

Preadsorption of aniline dimer on the surface of MWCNTs enabled a composite with better morphology, high conductivity, high specific capacitance and long cycling stability to be fabricated.

MnMoO4·4H2O nanoplates grown on a Ni foam substrate for excellent electrochemical properties

2014 ◽  
Vol 2 (48) ◽  
pp. 20723-20728 ◽  
Author(s):  
Yunjiu Cao ◽  
Wenyao Li ◽  
Kaibing Xu ◽  
Yuxin Zhang ◽  
Tao Ji ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Specific Capacitance ◽  
High Performance ◽  
High Specific Capacitance ◽  
Cycling Stability ◽  
Electrochemical Performances ◽  
Ni Foam ◽  
Hydrothermal Route ◽  
Facile Hydrothermal Route ◽  
Good Cycling Stability

MnMoO4·4H2O nanoplates were grown directly on a Ni foam by a facile hydrothermal route with enhanced electrochemical performances, i.e., a high specific capacitance of 1.15 F cm−2 (2300 F g−1) at 4 mA cm−2 and a good cycling stability of 92% of the initial specific capacitance after 3000 cycles, which may be considered a prospective material for high-performance electrochemical capacitors.

scholarly journals Comparative Studies on Two-Electrode Symmetric Supercapacitors Based on Polypyrrole:Poly(4-styrenesulfonate) with Different Molecular Weights of Poly(4-styrenesulfonate)

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 232 ◽  
Author(s):  
Hoseong Han ◽  
Jun Seop Lee ◽  
Sunghun Cho
Keyword(s):  
Thin Film ◽  
Molecular Weight ◽  
Electrochemical Properties ◽  
Comparative Studies ◽  
Solution Process ◽  
High Specific Capacitance ◽  
High Conductivity ◽  
Practical Applications ◽  
Molecular Weights ◽  
Coin Cell

Poly(4-styrenesulfonate)-conducting polymer (PSS-CP) is advantageous for thin-film electrode manufacturing due to its high conductivity, high charge storage, structural stability, and excellent ink dispersion. In this work, comparative studies of two-electrode symmetric supercapacitors using Polypyrrole:Poly(4-styrenesulfonate) (PPy:PSS), with different molecular weights (Mw’s) of Poly(4-styrenesulfonate) (PSS) as the electrodes, were performed. PPy:PSS can be easily prepared using a simple solution process that enables the mass production of thin-film electrodes with improved electrical and electrochemical properties. As-prepared PPy:PSS, with different PSS molecular weights, were assembled into two-electrode supercapacitors based on coin cell structures. It was confirmed that the electrical and electrochemical properties of PPy:PSS were improved with increasing PSS molecular weight. The coin cell, using PPy:PSS with a PSS molecular weight of 1.0 × 106 g/mol, exhibited higher areal capacitance (175.3 mF/cm2), higher volumetric capacitance (584.2 F/cm3), and longer cycling stability (86.3% after 5000 cycles) compared to those of PPy:PSS with PSS molecular weights of 2.0 × 105 and 7.0 × 104 g/mol. This work provides an efficient approach for producing cost-effective and miniaturized supercapacitors with high conductivity and high specific capacitance for practical applications in a variety of electronic devices.

Comprehending the effect of MMoO4 (M = Co, Ni) nanoflakes on improving the electrochemical performance of NiO electrodes

2015 ◽  
Vol 44 (48) ◽  
pp. 21131-21140 ◽  
Author(s):  
Lei An ◽  
Wenyao Li ◽  
Yunjiu Cao ◽  
Kaibing Xu ◽  
Rujia Zou ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Specific Capacitance ◽  
High Specific Capacitance ◽  
Cycling Stability ◽  
Nanosheet Array ◽  
Array Electrode

The hierarchical heterostructures of a NiO@MMoO4 (M = Co, Ni) nanosheet array electrode demonstrated remarkable electrochemical performance with a high specific capacitance and predominant cycling stability.

N-doped porous carbon derived from walnut shells with enhanced electrochemical performance for supercapacitor

2019 ◽  
Vol 12 (03) ◽  
pp. 1950042 ◽  
Author(s):  
Yunfeng Wang ◽  
Honghui Jiang ◽  
Shewen Ye ◽  
Jiaming Zhou ◽  
Jiahao Chen ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Specific Capacitance ◽  
Porous Carbon ◽  
Low Cost ◽  
High Specific Capacitance ◽  
Cycling Stability ◽  
Electrochemical Performances ◽  
Walnut Shells ◽  
Electrochemical Cycling ◽  
Elemental Doping

As the low-cost, natural multi-component for elemental doping and environment-friendly characteristics, biomass-derived porous carbon for energy storage attracts intense attention. Herein, walnut shells-based porous carbon has been obtained through carbonization, hydrothermal and activation treatment. The corresponding porous carbon owns superior electrochemical performances with specific capacitance reaching up to 462[Formula: see text]F[Formula: see text]g[Formula: see text] at 1[Formula: see text]A[Formula: see text]g[Formula: see text], and shows excellent cycling stability (5000 cycles, [Formula: see text]94.2% of capacitance retention at 10[Formula: see text]A[Formula: see text]g[Formula: see text]). Moreover, the symmetry supercapacitor achieves high specific capacitance (197[Formula: see text]F[Formula: see text]g[Formula: see text] at 1[Formula: see text]A[Formula: see text]g[Formula: see text]), relevant electrochemical cycling stability (5000 cycles, 89.2% of capacitance retention at 5[Formula: see text]A[Formula: see text]g[Formula: see text]) and high power/energy density (42.8[Formula: see text]W[Formula: see text]h[Formula: see text]kg[Formula: see text] at 1249[Formula: see text]W[Formula: see text]kg[Formula: see text]). Therefore, the facile synthesis approach and superb electrochemical performance ensure that the walnut shells-derived porous carbon is a promising electrode material candidate for supercapacitors.

Facile synthesis of exfoliated Co–Al LDH–carbon nanotube composites with high performance as supercapacitor electrodes

2014 ◽  
Vol 16 (33) ◽  
pp. 17936-17942 ◽  
Author(s):  
Lei Yu ◽  
Nannan Shi ◽  
Qi Liu ◽  
Jun Wang ◽  
Bin Yang ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Specific Capacitance ◽  
High Performance ◽  
High Specific Capacitance ◽  
Cycle Stability ◽  
Facile Synthesis ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites

A novel sandwich-like structured Co–Al LDH–CNT composite has been successfully synthesized. The as-prepared Co–Al LDHs–CNTs composite exhibites a high specific capacitance and a good cycle stability over 2000 cycles

Synthesis of surfactant-free SnS nanorods by a solvothermal route with better electrochemical properties towards supercapacitor applications

RSC Advances ◽  
2015 ◽  
Vol 5 (22) ◽  
pp. 17228-17235 ◽  
Author(s):  
Himani Chauhan ◽  
Manoj K. Singh ◽  
S. A. Hashmi ◽  
Sasanka Deka
Keyword(s):  
Electrochemical Properties ◽  
Specific Capacitance ◽  
Solvothermal Method ◽  
High Specific Capacitance ◽  
Solvothermal Route ◽  
Supercapacitor Applications

First use of a surfactant-free SnS nanorods synthesized by a solvothermal method in supercapacitor applications having high specific capacitance.

Hierarchical core/shell structures of ZnO nanorod@CoMoO4 nanoplates used as a high-performance electrode for supercapacitors

RSC Advances ◽  
2016 ◽  
Vol 6 (4) ◽  
pp. 3020-3024 ◽  
Author(s):  
Yunjiu Cao ◽  
Lei An ◽  
Lijun Liao ◽  
Xijian Liu ◽  
Tao Ji ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
High Performance ◽  
High Specific Capacitance ◽  
Cycling Stability ◽  
Shell Structures ◽  
Core Shell ◽  
Zno Nanorod ◽  
Good Cycling Stability

ZnO@CoMoO4 core/shell structures as an electrode for supercapacitors exhibited a high specific capacitance of 1.52 F cm−2 (1169 F g−1) at 2 mA cm−2 and a good cycling stability of 109% of the initial specific capacitance after 5000 cycles.

A simple approach to prepare nickel hydroxide nanosheets for enhanced pseudocapacitive performance

RSC Advances ◽  
2014 ◽  
Vol 4 (37) ◽  
pp. 19476-19481 ◽  
Author(s):  
Anjon Kumar Mondal ◽  
Dawei Su ◽  
Shuangqiang Chen ◽  
Bing Sun ◽  
Kefei Li ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
Nickel Hydroxide ◽  
High Specific Capacitance ◽  
Simple Approach ◽  
Cycling Stability ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted ◽  
Superior Cycling Stability

A simple microwave-assisted synthesis of Ni(OH)2 nanosheets for supercapacitors with high specific capacitance and superior cycling stability.

scholarly journals The Preparation of Carbon Nanotube/MnO2Composite Fiber and Its Application to Flexible Micro-Supercapacitor

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Li Li ◽  
Chen Chen ◽  
Jing Xie ◽  
Zehuai Shao ◽  
Fuxin Yang
Keyword(s):  
Cyclic Voltammetry ◽  
Carbon Nanotube ◽  
Specific Capacitance ◽  
Ultrathin Films ◽  
Electronic Devices ◽  
High Specific Capacitance ◽  
Composite Fiber ◽  
Potential Applications ◽  
Cyclic Voltammetry Method ◽  
Fiber Electrode

In recent years, flexible electronic devices pursued for potential applications. The design and the fabrication of a novel flexible nanoarchitecture by coating electrical conductive MWCNT fiber with ultrathin films of MnO2to achieve high specific capacitance, for micro-supercapacitors electrode applications, are demonstrated here. The MWCNT/MnO2composite fiber electrode was prepared by the electrochemical deposition which was carried out through using two different methods: cyclic voltammetry and potentiostatic methods. The cyclic voltammetry method can get “crumpled paper ball” morphology MnO2which has bigger specific capacitances than that achieved by potentiostatic method. The flexible micro-supercapacitor was fabricated by twisting two aligned MWCNT fibers and showed an area specific capacitance of 2.43 mF/cm2. The flexible micro-supercapacitors also enable promising applications in various fields.

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