Recent Advancements in the Cobalt Oxides, Manganese Oxides, and Their Composite As an Electrode Material for Supercapacitor: A Review (original) (raw)

CV Analysis of Manganese Doped Cobalt Oxide Thin Fi LM Electrodes for Supercapacitor Application

2017

INTRODUCTION The Electrochemical supercapacitors (ESs) are ideal for energy storage that undergoes frequent charge and discharge cycles at high current and short duration. These are considered important energy efficiency devices for rapid energy storage and delivery. Among the advantages of ESs are high power density, environmentally friendly, long cycle life, high efficiency, wide range of operating temperatures, environmental friendliness and safety . ESs also serves as a bridging function for the power/energy gap of traditional dielectric capacitors. These characteristics have made ESs very competitive for applications in electric hybri d vehicles, digital communication devices such as ABSTRACT Manganese doped Cobalt oxide thin films were deposi ted on steel substrate by sol-gel spin coat method and investigated the impact of doping on electrochemica l behaviour. Cyclic Voltammetry technique was used for the electrochemical characterizations of supercapacitor ells fabricated usin...

A Review of Cobalt-Based Metal Hydroxide Electrode for Applications in Supercapacitors

Advances in Materials Science and Engineering

Supercapacitors are the cutting-edge, high performing, and emerging energy storage devices in the future of energy storage technology. It delivers high energy and produces higher specific capacitances. This research study provides insights into supercapacitor materials and their potential applications by examining different battery technologies compared with supercapacitors’ advantages and disadvantages. Transition metal hydroxides (cobalt hydroxides) have been studied to develop electrodes for supercapacitors and their use in various fields of energy and conversion devices. Cobalt-based metal oxides and hydroxides provide high-capacitance electrodes for supercapacitors. Metal hydroxides combine high electrical conductivity and excellent stability over time. The metal oxides used to prepare the electrodes for supercapacitors are cobalt-based metal oxides and hydroxides. It is stronger than most of the other oxides and has tremendous electrical conductivity. Cobalt hydroxides are als...

Cobalt Doped (Mn,Ti)- Oxides for Supercapacitors

2019

In this investigation, a (Mn,Ti)-oxide (Mn:Ti 65:35 wt%) was prepared using surfactant templating assisted sol-gel method. To prepare this nanocomposite, sol-A with Ti precursor and sol-B containing Mn precursor were separately prepared using the required precursor amounts in ethanol and 5 wt.% pluronic 123 surfactant. Gelation was accomplished by the addition of DI water and catalyzed by HCl. The gels were aged for 24 hrs, dried at 80C for 12 hrs and calcined at 1000C for 5 hrs. Additional gels were synthesized using isopropanol and acetic acid. These powdered electrode materials were analyzed by x-ray diffraction, which indicated the presence of a perovskite phase. Supercapacitors were fabricated and cyclic voltammetry measurements were performed to infer specific capacitance. Supercapacitor was also fabricated with cobalt doped (Mn,Ti)-oxide and its performance was evaluated.

Synthesis, properties, and performance of nanostructured metal oxides for supercapacitors

Pure and Applied Chemistry, 2014

Beyond activated carbon and other forms of high-surface area carbon operating solely as double layer storage materials in capacitors of high capacitance commonly somewhat imprecisely called supercapacitors other electrode materials storing electric charge by reversible and fast superficial redox processes are studied as active masses. The resulting devices combining double layer and Faradaic process-based charge storage – commonly called hybrid ones – show significantly higher capacitances at only marginally diminished power capability. Among the suggested materials metal oxides feature most prominently. Their formation, characterization and properties together with the performance of prepared devices are reviewed here.

Supercapacitive Performance of Electrodeposited Cobalt Oxide Electrode

Macromolecular Symposia, 2019

Metal oxide based supercapacitors have emerged as one of the most elegant storage systems with exclusive characteristics with high power density and long‐term cycling stability. Cobalt oxide (Co3O4) has particularly obtained rising interest due to their natural abundance, environment friendly, low cost, and high specific capacitance. Co3O4 thin film electrodes were successfully deposited via a simple and easy galvanostatic electrodeposition technique on to cheap stainless steel substrate. As‐deposited thin films were heated at 500 °C for its conversion to Co3O4. These films were characterized for XRD, SEM, and CA to understand the structural, morphological and wettability properties of Co3O4 electrode. By using cyclic voltammetry, charge‐discharge study and supercapacitive behavior of Co3O4 electrode were examined. The Co3O4 electrode showed maximum specific capacitance of 554 F g–1 at 5 mV s–1 in 1 m NaOH electrolyte. The specific energy, specific power, and coulombic efficiency sh...

Advances in the design and application of transition metal oxide-based supercapacitors

Open Chemistry, 2021

In the last years, supercapacitors (SCs) have been proposed as a promising alternative to cover the power density deficiency presented in batteries. Electrical double-layer SCs, pseudocapacitors, and hybrid supercapacitors (HSCs) have shown very attractive features such as high-power density, long cycle life, and tunable specific capacitance. The advances of these energy storage devices made by transition metal oxides (TMOs) and their production in pseudocapacitors and HSCs depend on chemical composition, crystalline structure, morphology, theoretical capacitance, and oxidation states. In this way, this critical review considers several metal oxides (RuO2, MnO2, V2O5, and Co3O4) and their different configurations with diverse carbon-based materials. Energy storage mechanisms and fundamental principles to understand the promising effect of metal oxides in SCs devices are thoroughly described. Special attention as regards to the energy storage mechanisms relative to the specific capac...

An Assay of Electrodeposited Cobalt Oxide Thin Film as a Supercapacitor Electrode

Macromolecular Symposia, 2020

The present research work is a humble effort to synthesize cobalt oxide supercapacitive electrode by electrodeposition method via potentiostatic mode of thin film deposition. The cobalt hydroxide material is deposited on stainless steel substrate at room temperature and annealed at 500°C to form cobalt oxide thin film electrode. The structural, morphological, and wettability investigation of the as-deposited cobalt oxide thin film electrode is done by XRD-analysis, SEM characterization, and contact angle measurement, respectively. The supercapacitive properties are investigated in aqueous 1M Na 2 SO 4 electrolyte by cyclic voltametry and galvanostatic charge-discharge analysis. The results of the investigations are maximum specific capacitance of 284.4 F g −1 at a scan rate 5 mV s −1 , specific energy 4.325 Wh kg −1 , specific power 3 kW kg −1 , and Coulomb efficiency 53.75%. The results so obtained promote cobalt oxide to be a challenging material for energy storage devices and supercapacitor applications.

Study and optimisation of manganese oxide-based electrodes for electrochemical supercapacitors

Journal of Power Sources, 2009

A manganese oxide material was synthesised by an easy precipitation method based on reduction of potassium permanganate(VII) with a manganese(II) salt. The material was treated at different temperatures to study the effect of thermal treatment on capacitive property. The best capacitive performance was obtained with the material treated at 200 • C. This material was used to prepare electrodes with different amounts of polymer binder, carbon black and graphite fibres to individuate the optimal composition that gave the best electrochemical performances. It was found that graphite fibres improve the electrochemical performance of electrodes. The highest specific capacitance (267 F g −1 MnO x ) was obtained with an electrode containing 70% of MnO x , 15% of carbon black, 10% of graphite fibres and 5% of PVDF. This electrode, with CB/GF ratio of 1.5, showed a higher utilization of manganese oxide. The results reported in the present paper further confirmed that manganese oxide is a very interesting material for supercapacitor application.

Recent Developments in Supercapacitor Electrodes: A Mini Review

ChemEngineering

The use of nonrenewable fossil fuels for energy has increased in recent decades, posing a serious threat to human life. As a result, it is critical to build environmentally friendly and low-cost reliable and renewable energy storage solutions. The supercapacitor is a future energy device because of its higher power density and outstanding cyclic stability with a quick charge and discharge process. Supercapacitors, on the other hand, have a lower energy density than regular batteries. It is well known that the electrochemical characteristic of supercapacitors is strongly dependent on electrode materials. The current review highlights advance in the TMOs for supercapacitor electrodes. In addition, the newly discovered hybrid/pseudo-supercapacitors have been discussed. Metal oxides that are employed as electrode materials are the focus of this study. The discovery of nanostructured electrode materials continues to be a major focus of supercapacitor research. To create high-performance ...

A REVIEW ON ELECTROCHEMICAL SUPERCAPACITORS OF COMPOSITE-METAL-OXIDE NANOSTRUCTURES

In near future, use of electrochemical supercapacitors plays important role in energy and power storage applications which are broadly classified into two types; a) electrochemical-double layer capacitors, and b) redox capacitors. Favorable electrode materials used in electrochemical supercapacitors include transition metal oxides, conducting polymers, carbons and their composites etc. Now-a-days the aqueous and non-aqueous chemically grown metal oxide thin film electrodes including ruthenium oxide, iridium oxide, manganese oxide, cobalt oxide, nickel oxide, tin oxide, iron oxide, pervoskites, ferrites etc., have been envisaged for electrochemical supercapacitor application. This review presents a brief literature survey regarding electrode materials employed, so far, in electrochemical supercapacitors. Efforts have also been taken to highlight their configurations and charge transport/ collection kinetics.