The complementary advanced characterization and electrochemical techniques for electrode materials for supercapacitors

2021 ◽  
Vol 44 ◽  
pp. 103370
Author(s):  
Mutawara Mahmood Baig ◽  
Iftikhar Hussain Gul ◽  
Sherjeel Mahmood Baig ◽  
Faisal Shahzad
Keyword(s):  
Electrode Materials ◽  
Electrochemical Techniques ◽  
Advanced Characterization

In situelectrochemical synchrotron radiation for Li-ion batteries

2018 ◽  
Vol 25 (1) ◽  
pp. 151-165 ◽  
Author(s):  
Tibebu Alemu ◽  
Fu-Ming Wang
Keyword(s):  
Synchrotron Radiation ◽  
Electrode Materials ◽  
Electrochemical Techniques ◽  
Phase Changes ◽  
Li Ion Batteries ◽  
Essential Information ◽  
X Ray ◽  
Intercalation Process ◽  
Li Ion

Observing the electronic structure, compositional change and morphological evolution of the surface and interface of a battery during operation provides essential information for developing new electrode materials for Li-ion batteries (LIBs); this is because such observations demonstrate the fundamental reactions occurring inside the electrode materials. Moreover, obtaining detailed data on chemical phase changes and distributions by analyzing an operating LIB is the most effective method for exploring the intercalation/de-intercalation process, kinetics and the relationship between phase change or phase distribution and battery performance, as well as for further optimizing the material synthesis routes for advanced battery materials. However, most conventionalin situelectrochemical techniques (other than by using synchrotron radiation) cannot clearly or precisely demonstrate structural change, electron valence change and chemical mapping information.In situelectrochemical-synchrotron radiation techniques such as X-ray absorption spectroscopy, X-ray diffraction spectroscopy and transmission X-ray microscopy can deliver accurate information regarding LIBs. This paper reviews studies regarding various applications ofin situelectrochemical-synchrotron radiation such as crystallographic transformation, oxidation-state changes, characterization of the solid electrolyte interphase and Li-dendrite growth mechanism during the intercalation/de-intercalation process. The paper also presents the findings of previous review articles and the future direction of these methods.

scholarly journals A Review on Nano-/Microstructured Materials Constructed by Electrochemical Technologies for Supercapacitors

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Huizhen Lv ◽  
Qing Pan ◽  
Yu Song ◽  
Xiao-Xia Liu ◽  
Tianyu Liu
Keyword(s):  
Electrode Materials ◽  
Electrochemical Techniques ◽  
Electrochemical Performances ◽  
Active Materials ◽  
Exfoliated Graphene ◽  
Metal Plating ◽  
Galvanostatic Deposition ◽  
Electrochemically Active ◽  
History Of ◽  
Pulse Deposition

AbstractThe article reviews the recent progress of electrochemical techniques on synthesizing nano-/microstructures as supercapacitor electrodes. With a history of more than a century, electrochemical techniques have evolved from metal plating since their inception to versatile synthesis tools for electrochemically active materials of diverse morphologies, compositions, and functions. The review begins with tutorials on the operating mechanisms of five commonly used electrochemical techniques, including cyclic voltammetry, potentiostatic deposition, galvanostatic deposition, pulse deposition, and electrophoretic deposition, followed by thorough surveys of the nano-/microstructured materials synthesized electrochemically. Specifically, representative synthesis mechanisms and the state-of-the-art electrochemical performances of exfoliated graphene, conducting polymers, metal oxides, metal sulfides, and their composites are surveyed. The article concludes with summaries of the unique merits, potential challenges, and associated opportunities of electrochemical synthesis techniques for electrode materials in supercapacitors.

Electrochemical Techniques for Intercalation Electrode Materials in Rechargeable Batteries

2017 ◽  
Vol 50 (4) ◽  
pp. 1022-1031 ◽  
Author(s):  
Yujie Zhu ◽  
Tao Gao ◽  
Xiulin Fan ◽  
Fudong Han ◽  
Chunsheng Wang
Keyword(s):  
Electrode Materials ◽  
Electrochemical Techniques ◽  
Rechargeable Batteries

A Study on Composition Dependent Electrocatalytic Behaviour of Electrodeposited Ni-Mo Alloy

2017 ◽  
Vol 17 ◽  
pp. 113-120
Author(s):  
Sandhya Shetty ◽  
Ampar Chitharanjan Hegde
Keyword(s):  
Alkaline Medium ◽  
Electrocatalytic Activity ◽  
Electrode Materials ◽  
Electrochemical Techniques ◽  
Copper Substrate ◽  
Corrosion Stability ◽  
Corrosion Resistant ◽  
Polarization Study ◽  
Cathode Current ◽  
Current Densities

In the present work, efficient electrode material for water splitting reaction has been developed through electrodeposition method. The nanocrystalline Ni-Mo alloy coatings were deposited at different cathode current densities (c.d.) on copper substrate. The electrocatalytic activity of the electrodeposits for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in 1.0 M KOH were evaluated by electrochemical techniques like cyclic voltammetry (CV) and chronopotentiometry (CP). The corrosion stability of the Ni-Mo alloys was tested in same alkaline medium by potentiodynamic polarization study. The experiment results demonstrated thatNi-Mo alloy deposited, respectively at 1.0 A dm-2 (38.3 wt.% Mo) and 4.0 A dm-2 (33.2 wt.% Mo) are good electrode materials for HER and OER. Further, Ni-Mo alloy deposited at 4.0 A dm-2 was found to be most corrosion resistant in the alkaline medium. The electrocatalytic activity of Ni-Mo alloys were explained in terms of their surface morphology, phase structure and chemical composition, confirmed by XRD, SEM and EDX analysis.

scholarly journals Sensor Development for Corrosion Monitoring of Stainless Steels in H2SO4 Solutions

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1449
Author(s):  
Miha Hren ◽  
Tadeja Kosec ◽  
Mari Lindgren ◽  
Elina Huttunen-Saarivirta ◽  
Andraž Legat
Keyword(s):  
Stainless Steel ◽  
Stainless Steels ◽  
Electrode Materials ◽  
Electrochemical Techniques ◽  
Industrial Process ◽  
Process Conditions ◽  
Corrosion Monitoring ◽  
Electrochemical Tests ◽  
Hydrometallurgical Processing ◽  
Lower Corrosion Rate

Equipment made of different stainless steels is often used in the hydrometallurgical processing industry. In this study, an electrical resistance sensor was developed for monitoring corrosion in acidic solutions at high temperature. Two types of stainless steel were used as the electrode materials, namely grade 316L stainless steel (EN 1.4404) and grade 2507 duplex stainless steel (EN 1.4410). The materials and sensors were exposed to a 10% H2SO4 solution containing 5000 mg/L of NaCl at various temperatures. Results from the sensors were verified using electrochemical techniques and postexposure examination. Results showed that the microstructure played an important role in the interpretation of corrosion rates, highlighting the importance of using an appropriate stainless steel for the production of sensors. Electrochemical tests and postexposure examination both showed that the grade 2507 had a significantly lower corrosion rate compared to the grade 316L. Under industrial‑process conditions, the results for the grade 2507 sensor were promising with respect to sensor durability and performance, despite the extremely harsh operating environment.

scholarly journals An Ultra-Sensitive Electrochemical Sensor for the Detection of Carcinogen Oxidative Stress 4-Nitroquinoline N-Oxide in Biologic Matrices Based on Hierarchical Spinel Structured NiCo2O4 and NiCo2S4; A Comparative Study

2020 ◽  
Vol 21 (9) ◽  
pp. 3273 ◽  
Author(s):  
Tse-Wei Chen ◽  
Elayappan Tamilalagan ◽  
Shen-Ming Chen ◽  
Muthumariappan Akilarasan ◽  
Selvarasu Maheshwaran ◽  
...  
Keyword(s):  
Oxidative Damage ◽  
Blood Serum ◽  
Electrochemical Sensor ◽  
Human Blood ◽  
Electrode Materials ◽  
Electrochemical Sensors ◽  
Electrochemical Techniques ◽  
Human Blood Serum ◽  
Glass Carbon Electrode ◽  
Detection Of Biomarkers

Various factors leads to cancer; among them oxidative damage is believed to play an important role. Moreover, it is important to identify a method to detect the oxidative damage. Recently, electrochemical sensors have been considered as the one of the most important techniques to detect DNA damage, owing to its rapid detection. However, electrode materials play an important role in the properties of electrochemical sensor. Currently, researchers have aimed to develop novel electrode materials for low-level detection of biomarkers. Herein, we report the facile hydrothermal synthesis of NiCo2O4 micro flowers (MFs) and NiCo2S4 micro spheres (Ms) and evaluate their electrochemical properties for the detection of carcinogen-causing biomarker 4-nitroquinoline n-oxide (4-NQO) in human blood serum and saliva samples. Moreover, as-prepared composites were fabricated on a glass carbon electrode (GCE), and its electrochemical activities for the determination of 4-NQO were investigated by using various electrochemical techniques. Fascinatingly, the NiCo2S4-Ms showed a very low detection limit of 2.29 nM and a wider range of 0.005 to 596.64 µM for detecting 4-NQO. Finally, the practical applicability of NiCo2S4-Ms in the 4-NQO spiked human blood serum and saliva samples were also investigated.

Advanced Spectroelectrochemical Techniques to Study Electrode Interfaces Within Lithium-Ion and Lithium-Oxygen Batteries

2019 ◽  
Vol 12 (1) ◽  
pp. 323-346 ◽  
Author(s):  
Alexander J. Cowan ◽  
Laurence J. Hardwick
Keyword(s):  
Near Field ◽  
Electrochemical Techniques ◽  
High Capacity ◽  
Lithium Ion ◽  
Advanced Characterization ◽  
Characterization Methods ◽  
Sum Frequency ◽  
Surface Enhanced ◽  
Recent Developments ◽  
Lithium Oxygen Batteries

Lithium battery technologies have revolutionized mobile energy storage, but improvements in the technology are still needed. Critical to delivering new light weight, high capacity, safe devices is an improved understanding of the dynamic processes occurring at the electrode-electrolyte interfaces. Therefore, alongside advances in materials there has been a parallel progression in advanced characterization methods. Herein, recent developments for operando spectro-electrochemical techniques centered on Raman, infrared, and sum frequency generation are described within the context of lithium-ion and non-aqueous lithium-oxygen battery research. In particular, shell-isolated nanoparticles for enhanced Raman spectroscopy (SHINERS), surface-enhanced infrared absorption spectroscopy (SEIRAS), and near-field infrared are explained and critically evaluated, and future opportunities discussed. The aim is to introduce the wider community to the developing range of methodologies and tools now available in the hope that it encourages greater usage across the sector.

A novel ligand with –NH2 and –COOH-decorated Co/Fe-based oxide for an efficient overall water splitting: dual modulation roles of active sites and local electronic structure

2020 ◽  
Vol 10 (18) ◽  
pp. 6266-6273
Author(s):  
Yalan Zhang ◽  
Zebin Yu ◽  
Ronghua Jiang ◽  
Jung Huang ◽  
Yanping Hou ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Water Splitting ◽  
Energy Demand ◽  
Active Sites ◽  
Electrode Materials ◽  
Global Energy ◽  
Overall Water Splitting ◽  
Local Electronic Structure ◽  
Electrochemical Water Splitting

Excellent electrochemical water splitting with remarkable durability can provide a solution to satisfy the increasing global energy demand in which the electrode materials play an important role.

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