The Electrochemical Performance of δ-MnO2 Cathode Material for Aqueous Zinc-Ion Batteries: The Role of Current Collector

2021 ◽  
Vol 105 (1) ◽  
pp. 135-142
Author(s):  
Mikhail A. Kamenskii ◽  
Svetlana N. Eliseeva ◽  
Veniamin V. Kondratiev
Keyword(s):  
Electrochemical Performance ◽  
Current Collector ◽  
Zinc Ion ◽  
Carbon Paper ◽  
Galvanostatic Charge ◽  
Capacity Fading ◽  
Stainless Steel Mesh ◽  
Current Collectors ◽  
Corrosion Of Steel

Electrochemical properties of δ-MnO2-based cathode materials were studied in dependence on current collector used for electrode casting (stainless steel mesh, carbon paper and titanium foil) by galvanostatic charge/discharge measurements and cyclic voltammetry. It was shown that δ-MnO2-based electrodes cast on carbon paper demonstrate the most stable electrochemical performance in comparison with two other current collectors. This can be explained by corrosion of steel and passivation of titanium in mild aqueous electrolytes. Detailed study of carbon paper as current collector shows that pressing of electrodes leads to decreasing the porosity and fast capacity fading.

scholarly journals Electrochemical Properties of PANI as Single Electrode of Electrochemical Capacitors in Acid Electrolytes

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Haihua Zhu ◽  
Shunjin Peng ◽  
Weijie Jiang
Keyword(s):  
Electrochemical Properties ◽  
Chemical Structure ◽  
Active Material ◽  
Electrochemical Capacitor ◽  
Current Collector ◽  
Carbon Paper ◽  
Solution Polymerization ◽  
Chemical Solution ◽  
Galvanostatic Charge ◽  
Charge Discharge

The polyaniline (PANI) powder with globular sponge-like morphology was prepared by chemical solution polymerization, and its morphology and chemical structure were characterized by scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR), respectively. The single electrode of electrochemical capacitor was made using the prepared PANI powder as active material and carbon paper as current collector. Electrochemical properties of PANI as a single electrode in 1 M HCl and 1 M H2SO4electrolyte solution were tested by galvanostatic charge/discharge (GCD) and cyclic voltammetry (CV) techniques. It has been found that PANI has higher specific capacitance of 302.43 Fg−1, higher specific energy of 54.44 Wh·kg−1at 0.5 Ag−1, and higher working potential in 1 M HCl than those in 1 M H2SO4.

A flexible and conductive metallic paper-based current collector with energy storage capability in supercapacitor electrodes

2019 ◽  
Vol 48 (22) ◽  
pp. 7659-7665 ◽  
Author(s):  
Yaoyin Li ◽  
Qiyuan Wang ◽  
Yong Wang ◽  
Mingjun Bai ◽  
Jian Shao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Energy Storage ◽  
Electrochemical Performance ◽  
Electroless Deposition ◽  
Current Collector ◽  
Current Collectors ◽  
Conductive Paper

Flexible and conductive paper-based current collectors are fabricated by directly depositing metallic Ni layer composed of spiny Ni nanospheres on the surface of paper via electroless deposition and exhibit excellent mechanical properties and electrochemical performance.

Performance Improvements by Embedded Thin Film Current Collectors for Microfluidic Fuel Cells With Porous Electrodes

2012 ◽  
Author(s):  
Jin Wook Lee ◽  
Erik Kjeang
Keyword(s):  
Thin Film ◽  
Fuel Cells ◽  
Contact Resistance ◽  
Soft Lithography ◽  
Electrochemical Impedance ◽  
Current Collector ◽  
Porous Electrodes ◽  
Carbon Paper ◽  
Current Collectors ◽  
Contact Points

In the present work, a chip embedded thin film current collector for vanadium fueled microfluidic fuel cells is proposed. Embedded current collectors are expected to increase the number of contact points with the porous electrodes and thereby reduce the overall contact resistance and ohmic losses of the cell. The micromachining based thin film process is compatible with the overall cell fabrication scheme, which is based on soft lithography, and does not require a substantial modification of the original cell design. The flow-through microfluidic fuel cell architecture with porous carbon paper electrodes is used as a proof-of-concept in this study. Our preliminary study shows that the peak power density of the cell with the current collector is increased by 79% at 300 μL min−1 compared to an otherwise identical cell without current collector, indicating that the contact resistance is significantly reduced. Electrochemical impedance spectroscopy analysis is carried out to estimate the overall cell ohmic resistance and confirms a 32% reduction using the current collectors.

Self-doped 2D-V2O5 nanoflakes – A high electrochemical performance cathode in rechargeable zinc ion batteries

2021 ◽  
Author(s):  
Muthusamy Tamilselvan ◽  
Thupakula Venkata Madhukar Sreekanth ◽  
Kisoo Yoo ◽  
Jonghoon Kim
Keyword(s):  
Electrochemical Performance ◽  
Zinc Ion

Crucial role of water content on the electrochemical performance of α-Ni(OH)2 as an anode material for lithium-ion batteries

Ionics ◽  
2020 ◽  
Vol 27 (1) ◽  
pp. 65-74
Author(s):  
Jinhuan Yao ◽  
Yanwei Li ◽  
Renshu Huang ◽  
Jiqiong Jiang ◽  
Shunhua Xiao ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Water Content ◽  
Anode Material ◽  
Crucial Role ◽  
Lithium Ion

Li0.95Na0.05Ti2(PO4)3/C with Good Performance as Anode Material for Aqueous Rechargeable Lithium Batteries

2014 ◽  
Vol 989-994 ◽  
pp. 316-319 ◽  
Author(s):  
Jing Zhu ◽  
Yong Guang Liu ◽  
Qing Qing Tian ◽  
Ling Wang ◽  
Ji Lin Cao
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Performance ◽  
Anode Material ◽  
Lithium Batteries ◽  
Sol Gel ◽  
Nasicon Structure ◽  
Galvanostatic Charge ◽  
Rechargeable Lithium Batteries ◽  
Structure And Morphology ◽  
Charge Discharge

Li0.95Na0.05Ti2(PO4)3/C nanocomposite was prepared by sol-gel method.The structure and morphology of the samples were characterized by XRD, SEM which showed the particles had typical NASICON structure and diameter range from 400~500nm. The electrochemical performance were tested by cyclic voltammetry and galvanostatic charge–discharge. Results show Li0.95Na0.05Ti2(PO4)3/C nanocomposite exhibitsmuch better electrochemical performance than bare Li0.95Na0.05Ti2(PO4)3.

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