scholarly journals High-Performance Ni-Co Sulfide Nanosheet-Nanotubes Grown on Ni Foam as a Binder Free Electrode for Supercapacitors

2019 ◽  
Vol 9 (15) ◽  
pp. 3082 ◽  
Author(s):  
Jaffer Saddique ◽  
Xiaopeng Cheng ◽  
Huifeng Shi ◽  
Rui Wu ◽  
Yuefei Zhang

The novel hierarchical Ni-Co sulfide nanosheet-nanotubes arrays were directly grown on Ni foam, as binder-free electrodes, have been successfully synthesized following a one-step facile hydrothermal method combined with a sulfide treatment. The initial value of the area capacitance achieved 2.28 F cm−2 at a current density of 1 mA cm−2. A high areal capacitance retention of 95.2% compared to activation-induced peak value is achieved after 3000 charge-discharge cycles, which is much better than counter Ni-Co oxide electrode (1.75 F cm−2 at 1 mA cm−2, 93.2% retention compared to activation induced peak value). The outstanding and excellent super capacitive performance is ascribed to ion-exchange reaction, which induces a flexible hollow nanotube feature and show higher conductivity, compared with Ni-Co oxide NWs. Cyclic voltammetry (CV) and Electrochemical impedance spectra (EIS) results confirmed that the synthesized electrode contains the lowest resistance at high, and at lower frequency, leading to easy penetration of electrolytes and fast transportation of electrons inside the electrode. In this proposed work, a one-step hydrothermal method has been followed, and provided for the sulfide-induced, with a noticeable electrochemical performance of nickel cobaltite compounds and supplying a promising route for high-performance supercapacitor electrodes.

RSC Advances ◽  
2015 ◽  
Vol 5 (32) ◽  
pp. 25304-25311 ◽  
Author(s):  
Jian Wu ◽  
Rui Mi ◽  
Shaomin Li ◽  
Pan Guo ◽  
Jun Mei ◽  
...  

A novel NiCo2O4 nanoneedle arrays with bottom crosslinked nanosheets grew on Ni foam as advanced binder-free electrodes via a facile one-step hydrothermal method followed by annealing in air, which exhibited high electrochemical performance.


RSC Advances ◽  
2014 ◽  
Vol 4 (39) ◽  
pp. 20234-20238 ◽  
Author(s):  
Zhenyu Wang ◽  
Yuefei Zhang ◽  
Yonghe Li ◽  
Haoyu Fu

A novel hierarchical porous NiCo2O4 nanograss array directly grown on Ni foam has been constructed via a simple one-step hydrothermal method combined with a calcination treatment, and possessed high electrochemical performance.


2015 ◽  
Vol 3 (5) ◽  
pp. 1953-1960 ◽  
Author(s):  
Lingjie Li ◽  
Jing Xu ◽  
Jinglei Lei ◽  
Jie Zhang ◽  
Frank McLarnon ◽  
...  

The Ni(OH)2 hexagonal platelets were in situ fabricated on Ni foam as a binder-free supercapacitor electrode material with high performance and excellent cycling stability by a one-step, cost-effective, green hydrothermal treatment of three-dimensional (3D) Ni foam in a 15 wt% H2O2 aqueous solution.


2016 ◽  
Vol 52 (24) ◽  
pp. 4517-4520 ◽  
Author(s):  
Seyyed Ebrahim Moosavifard ◽  
Saeed Fani ◽  
Mehdi Rahmanian

Hierarchical CuCo2S4 hollow nanoneedle arrays have been firstly synthesized on a Ni foam using a facile template-free hydrothermal method and applied as novel binder-free electrodes for high-performance asymmetric supercapacitors.


2021 ◽  
Vol 8 (1) ◽  
pp. 72-78
Author(s):  
Fuyong Ren ◽  
Yajun Ji ◽  
Shufen Tan ◽  
Fei Chen

Herein, binder-free sponge-like NiCo2S4 nanosheets supported on Ni foam with ultra-high mass loading were synthesized via a facile one-step hydrothermal route.


2021 ◽  
Author(s):  
Qichao Song ◽  
Chunguang Yang ◽  
Chun-Ming Yu

In this study, the binder-free high-performance nanocomposite of Fe3O4/oxygen-functionalized g-C3N4 was fabricated through a one-pot electrophoretic-electrochemical (EP-EC) process.


RSC Advances ◽  
2015 ◽  
Vol 5 (48) ◽  
pp. 38407-38416 ◽  
Author(s):  
Pinjari Syedvali ◽  
Gaddam Rajeshkhanna ◽  
Ediga Umeshbabu ◽  
Gundla Uday Kiran ◽  
G. Ranga Rao ◽  
...  

3D microstructured globe artichokes of a rGO/Ni0.3Co2.7O4 composite were synthesized through a hydrothermal method to contribute an efficient work nature as supercapacitor electrodes.


Energies ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5986
Author(s):  
Tao Chen ◽  
Hao Guo ◽  
Leiming Yu ◽  
Tao Sun ◽  
Anran Chen ◽  
...  

Si/PEDOT: PSS solar cell is an optional photovoltaic device owing to its promising high photovoltaic conversion efficiency (PCE) and economic manufacture process. In this work, dopamine@graphene was firstly introduced between the silicon substrate and PEDOT:PSS film for Si/PEDOT: PSS solar cell. The dopamine@graphene was proved to be effective in improving the PCE, and the influence of mechanical properties of dopamine@graphene on solar cell performance was revealed. When dopamine@graphene was incorporated into the cell preparation, the antireflection ability of the cell was enhanced within the wavelength range of 300~450 and 650~1100 nm. The enhanced antireflection ability would benefit amount of the photon-generated carriers. The electrochemical impedance spectra test revealed that the introduction of dopamine@graphene could facilitate the separation of carriers and improve the junction quality. Thus, the short-circuit current density and fill factor were both promoted, which led to the improved PCE. Meanwhile, the influence of graphene concentration on device performances was also investigated. The photovoltaic conversion efficiency would be promoted from 11.06% to 13.15% when dopamine@graphene solution with concentration 1.5 mg/mL was applied. The achievements of this study showed that the dopamine@graphene composites could be an useful materials for high-performance Si/PEDOT:PSS solar cells.


2021 ◽  
Author(s):  
Arunpandiyan Surulinathan ◽  
Raja Annamalai ◽  
Vinoth S ◽  
Alagarsamy Pandikumar ◽  
Ayyaswamy Arivarasan

Developing high-performance, robust, and economic supercapacitor is a promising path to the future electric vehicle’s technology. Herein, a hierarchically porous CeO2 micro rice was attached on the Ni foam surface...


2018 ◽  
Vol 47 (19) ◽  
pp. 6722-6728 ◽  
Author(s):  
Subbukalai Vijayakumar ◽  
Sadayappan Nagamuthu ◽  
Kwang-Sun Ryu

MgCo2O4 nanosheets grown on Ni-foam exhibited a maximum specific capacity of 947 C g−1 at 2 A g−1.


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