Synthesis and Electrochemical Performance of Amorphous Nickel Hydroxide Codoped with Fe3+ and PO43-

2011 ◽  
Vol 197-198 ◽  
pp. 1285-1288 ◽  
Author(s):  
Chang Jiu Liu ◽  
Shi Juan Chen ◽  
Dan Ma ◽  
Yan Wei Li
Keyword(s):  
Electrochemical Performance ◽  
Nickel Hydroxide ◽  
Electrochemical Impedance ◽  
Structural Defects ◽  
Precipitation Method ◽  
Rapid Freezing ◽  
Electrochemical Reversibility ◽  
Specific Discharge ◽  
Micro Emulsion ◽  
Charge Discharge

Amorphous nickel hydroxide powder codoped with Fe3+ and PO43- was synthesized by micro-emulsion precipitation method combined with rapid freezing technique. The microstructures of the prepared samples were characterized by XRD, SEM, EDS, and Raman spectra. The electrochemical performance of the prepared samples was analyzed by cyclic voltammetry, electrochemical impedance spectroscopy, and charge-discharge tests. The results showed that this amorphous nickel hydroxide codoped with Fe3+ and PO43- resulted in more structural defects within the nickel hydroxide. The Fe3+ and PO43- codoping could increase the specific discharge capacity and improve the electrochemical reversibility of the amorphous nickel hydroxide.

Study on the Performance of Amorphous Nickel Hydroxide Codoped with Ce and Fe

2011 ◽  
Vol 694 ◽  
pp. 718-722
Author(s):  
Chang Jiu Liu ◽  
Chun Xiao Xing ◽  
Shi Juan Chen
Keyword(s):  
Nickel Hydroxide ◽  
Electrochemical Impedance ◽  
Chemical Precipitation ◽  
Charge Transfer Resistance ◽  
Structural Defects ◽  
Rapid Freezing ◽  
Transfer Resistance ◽  
Freezing Method ◽  
Electrochemical Reversibility ◽  
Charge Discharge

Amorphous nickel hydroxide powders codoped with Ce and Fe were synthesized by the combined chemical precipitation and rapid freezing method. The microstructure and chemical composition of the samples was characterized by XRD,SAED and EDS. The electrochemical performance of the prepared samples was analyzed by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and charge-discharge tests. The results showed that this amorphous nickel hydroxide codoped with Ce and Fe had more structural defects than those of Fe singly doped amorphous nickel hydroxide. These abundant structural defects with Ce and Fe codoped amorphous nickel hydroxide increased the thermal stability, decreased the charge transfer resistance, inhibited oxygen evolution reaction effectively and improved the electrochemical reversibility of the amorphous nickel hydroxide electrode.

Structure and Electrochemical Performance of Amorphous Nickel Hydroxide Doped with La and Al

2010 ◽  
Vol 663-665 ◽  
pp. 1217-1220
Author(s):  
Chang Jiu Liu ◽  
Chun Xiao Xing ◽  
Shi Juan Chen ◽  
Yan Wei Li
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Performance ◽  
Nickel Hydroxide ◽  
Electrochemical Impedance ◽  
Chemical Precipitation ◽  
Structural Defects ◽  
Rapid Freezing ◽  
Freezing Method ◽  
Electrochemical Reversibility

Amorphous nickel hydroxide powders doped with rare earth La3+ and Al3+ were synthesized by the combined chemical precipitation and rapid freezing method. The microstructure of the samples was characterized by XRD and Raman spectra. The electrochemical performance of the prepared samples was analyzed by electrochemical impedance spectroscopy and charge-discharge tests. The results showed that this amorphous nickel hydroxide codoped with La3+ and Al3+ had more structural defects than those of the undoped amorphous nickel hydroxide and La3+ singly doped amorphous nickel hydroxide. These abundant structural defects with La3+ and Al3+ codoped amorphous nickel hydroxide decreased the electrochemical impedance spectroscopy and improved the electrochemical reversibility of the amorphous nickel hydroxide electrode.

Carbon Nanotubes on the Performance of Al3+ Doped α-Nickel Hydroxide

2011 ◽  
Vol 287-290 ◽  
pp. 1416-1419
Author(s):  
Chang Jiu Liu ◽  
Pei Pei Li ◽  
Liang Hua Huang
Keyword(s):  
Carbon Nanotubes ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Performance ◽  
Nickel Hydroxide ◽  
Electrochemical Impedance ◽  
Electrochemical Reaction ◽  
Cycling Stability ◽  
Specific Discharge ◽  
Charge Discharge

The effect of carbon nanotubes (CNTs) addition on the electrochemical performance of Al doped α-nickel hydroxide is studied. The microstructure and electrochemical performance of the prepared samples are characterized by XRD,SEM, electrochemical impedance spectroscopy, charge-discharge at different rate, and Charge-discharge cycling stability tests. The results show that the addition of CNTs could decrease the electrochemical reaction impedance dramatically, increase the specific discharge capacity at higher rate, and improve the Charge-discharge cycling stability reversibility.

High-Temperature Electrochemical Performance of Amorphous Nickel Hydroxide Codoped with Y and Mg

2012 ◽  
Vol 554-556 ◽  
pp. 390-394
Author(s):  
Chang Jiu Liu ◽  
Wei Shang ◽  
Shi Juan Chen
Keyword(s):  
High Temperature ◽  
Electrochemical Performance ◽  
Nickel Hydroxide ◽  
Discharge Rate ◽  
Specific Capacity ◽  
Structural Features ◽  
Discharge Voltage ◽  
Structural Defects ◽  
Precipitation Method ◽  
Charge Discharge

Amorphous nickel hydroxide codoped with Y and Mg was synthesized by micro-emulsion precipitation method combined with rapid freezing technique. The physical properties and micro-structural features of the prepared sample were characterized and high-temperature electrochemical performance was analyzed by cyclic voltammetry and charge/discharge tests, respectively. The results indicate that this amorphous nickel hydroxide codoped with Y and Mg has more structural defects and better thermal stability, therefore results in a relatively high specific capacity(332.46 mAh•g-1 at a charge/discharge rate of 0.2C) and a high middle discharge voltage of 1.265V at 60°C. Moreover, the Y and Mg codoped amorphous nickel hydroxide exhibits good electrochemical reaction reversibility and structural stability.

Structure and Electrochemical Performance of Cu and Al Codoped Nanometer α-Nickel Hydroxide

2012 ◽  
Vol 479-481 ◽  
pp. 230-233 ◽  
Author(s):  
Jie Bao ◽  
Yan Juan Zhu ◽  
Qing Sheng Xu ◽  
Yi Huan Zhuang ◽  
Ru Dong Zhao ◽  
...  
Keyword(s):  
Particle Size ◽  
Electrochemical Performance ◽  
Nickel Hydroxide ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
Electrochemical Tests ◽  
Proton Diffusion ◽  
Ultrasonic Assisted ◽  
Specific Discharge ◽  
Proton Diffusion Coefficient

Nanometer α-nickel hydroxide codoped with Cu and Al has been synthesized by the ultrasonic-assisted precipitation method. The crystal structure and particle size were analyzed by X-ray diffraction (XRD) and particle size distribution (PSD). The electrochemical performance of the samples was characterized by the charge/discharge test and cyclic voltammetry. The results of electrochemical tests demonstrated that the specific discharge capacity of Cu/Al codoped α-nickel hydroxide (330 mAh/g) is much higher than that of pure spherical nickel (240 mAh/g), and it exhibits a relatively good electrochemical reaction reversibility and large proton diffusion coefficient.

Morphology and Electrochemical Performance of Amorphous Nickel Hydroxide Added Anion

2013 ◽  
Vol 834-836 ◽  
pp. 466-471
Author(s):  
Wei Shang ◽  
Chang Jiu Liu ◽  
Yu Qing Wen
Keyword(s):  
Electrochemical Performance ◽  
Nickel Hydroxide ◽  
Chemical Precipitation ◽  
Precipitation Method ◽  
Cyclic Stability ◽  
Rapid Quench ◽  
Discharge Potential ◽  
Charging Efficiency ◽  
Charge Discharge ◽  
Scanning Electron

Amorphous nickel hydroxides added anion (PO43-) has been prepared by chemical precipitation method combined with rapid quench technique. The morphology of the prepared samples were characterized by scanning electron microscope (SEM), and energy dispersive spectroscopy (EDS). The effect of anion on the electrochemical performance of the prepared nickel hydroxides were investigated by charge/discharge tests and cyclic voltammetry (CV). The results demonstrated that amorphous nickel hydroxide added PO43-has better electrochemical performance, such as higher discharge potential, better reaction reversibility, higher the charging efficiency, and better cyclic stability, than that of the pure amorphous nickel hydroxide.

Electrochemical Performance of Mn and Fe Substitution in LiCo0.9X0.1O2 Cathode Materials

2020 ◽  
Vol 301 ◽  
pp. 195-201
Author(s):  
Nor Syamilah Syamimi Mohd Abdillih ◽  
Norlida Kamarulzaman ◽  
Kelimah Elong ◽  
Nurhanna Badar ◽  
Mohd Sufri Mastuli
Keyword(s):  
Electrochemical Performance ◽  
Cathode Materials ◽  
Particle Sizes ◽  
X Ray Diffraction ◽  
Voltage Range ◽  
Scanning Electron Microcopy ◽  
Pure Phase ◽  
Specific Discharge ◽  
Fe Substitution ◽  
Charge Discharge

LiCo0.9X0.1O2 (where X=Mn and Fe) were synthesized using self-propagating combustion (SPC) method using citric acid as a combustion agent. The precursors of LiCo0.9X0.1O2 were annealed at a temperature of 800 °C at 24 h. The phase and crystalinity of the materials were characterized using X-Ray Diffraction (XRD). All the materials were observed to be single and pure phase with no impurity peaks detected. The morphology and particle sizes of the materials were also analyzed using Field Emission Scanning Electron Microcopy (FESEM). Finally, the electrochemical performance of the materials was studied using charge-discharge cycling in the voltage range of 2.5 to 4.3 V. Based on the results from charge-discharge studies, Mn substituted cathode materials exhibit better specific discharge capacity compared with Fe substituted cathode materials.

scholarly journals Pseudocapacitive Behavioral Testing of Iron Vanadate Nanoparticles Synthesized by Simple Co- Precipitation Method

2019 ◽  
Vol 9 (1S3) ◽  
pp. 374-378
Keyword(s):  
Electrochemical Impedance ◽  
Impedance Analysis ◽  
Spectroscopic Studies ◽  
Precipitation Method ◽  
Spectroscopic Techniques ◽  
Electron Microscopic ◽  
Electrochemical Behaviors ◽  
X Ray ◽  
Co Precipitation ◽  
Charge Discharge

Iron vanadate nanoparticles were prepared by simple co-precipitation method. The crystal structure and elemental composition of prepared material were confirmed using X-ray Diffraction analysis and Elemental Dispersive X- ray spectroscopic analysis respectively. Surface morphology of the sample was analyzed by Scanning Electron Microscopic techniques. Optical absorption and molecular vibrations were studied by UV-Vis. absorption spectroscopy and Fourier Transform Infrared spectroscopic techniques. Electrochemical behaviors such as redox property, charge-discharge mechanism and impedance analysis were examined with cyclic voltammetry, Galvanostatic charge-discharge and electrochemical impedance spectroscopic studies.

scholarly journals Facile Synthesis of Carbon Nanospheres with High Capability to Inhale Selenium Powder for Electrochemical Energy Storage

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6760
Author(s):  
Mustafa Khan ◽  
Xuli Ding ◽  
Hongda Zhao ◽  
Xinrong Ma ◽  
Yuxin Wang
Keyword(s):  
Electrochemical Performance ◽  
Current Density ◽  
Electrochemical Impedance ◽  
Discharge Rate ◽  
Specific Capacity ◽  
Rate Performance ◽  
X Ray Diffraction ◽  
Carbon Nanospheres ◽  
Surface Areas ◽  
Charge Discharge

Carbon–selenium composite positive electrode (CSs@Se) is engineered in this project using a melt diffusion approach with glucose as a precursor, and it demonstrates good electrochemical performance for lithium–selenium batteries. X-ray diffraction (XRD) and scanning electron microscopy (SEM) with EDS analysis are used to characterize the newly designed CSs@Se electrode. To complete the evaluation, electrochemical characterization such as charge–discharge (rate performance and cycle stability), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) tests are done. The findings show that selenium particles are distributed uniformly in mono-sized carbon spheres with enormous surface areas. Furthermore, the charge–discharge test demonstrates that the CSs@Se cathode has a rate performance of 104 mA h g−1 even at current density of 2500 mA g−1 and can sustain stable cycling for 70 cycles with a specific capacity of 270 mA h g−1 at current density of 25 mA g−1. The homogeneous diffusion of selenium particles in the produced spheres is credited with an improved electrochemical performance.

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