Fabrication of Phosphorus-Doped Cobalt Silicate with Improved Electrochemical Properties

The development of electrode materials for supercapacitors (SCs) is greatly desired, and this still poses an immense challenge for researchers. Cobalt silicate (Co2SiO4, denoted as CoSi) with a high theoretical capacity is deemed to be one of the sustainable electrode materials for SCs. However, its achieved electrochemical properties are still not satisfying. Herein, the phosphorus (P)-doped cobalt silicate, denoted as PCoSi, is synthesized by a calcining strategy. The PCoSi exhibits 1D nanobelts with a specific surface area of 46 m2∙g−1, and it can significantly improve the electrochemical properties of CoSi. As a supercapacitor’s (SC’s) electrode, the specific capacitance of PCoSi attains 434 F∙g−1 at 0.5 A∙g−1, which is much higher than the value of CoSi (244 F∙g−1 at 0.5 A∙g−1). The synergy between the composition and structure endows PCoSi with attractive electrochemical properties. This work provides a novel strategy to improve the electrochemical performances of transition metal silicates.

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ZIF-67-derived NiCo2O4@Co2P/Ni2P honeycomb nanosheets on carbon cloth for high-performance asymmetric supercapacitors

Inorganic Chemistry Frontiers ◽

10.1039/d1qi00934f ◽

2021 ◽

Author(s):

Wen-Wei Song ◽

Bing Wang ◽

Xiao-Man Cao ◽

Qiang Chen ◽

Zhengbo Han

Keyword(s):

Transition Metal ◽

Transition Metal Oxides ◽

High Performance ◽

Electrode Materials ◽

Redox Activity ◽

Electrochemical Performances ◽

Carbon Cloth ◽

Metal Phosphides ◽

Metal Organic ◽

Transition Metal Phosphides

Metal-organic frameworks (MOFs)-derived transition-metal oxides and transition-metal phosphides have great application potential as electrode materials for supercapacitors, owing to the excellent redox activity and high conductivity. However, their electrochemical performances...

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Effect of Lithium in Transition Metal Layers of High-Ni Positive Electrode Materials on Electrochemical Properties

ECS Meeting Abstracts ◽

10.1149/ma2016-01/2/323 ◽

2016 ◽

Keyword(s):

Transition Metal ◽

Electrochemical Properties ◽

Electrode Materials ◽

Positive Electrode ◽

Metal Layers ◽

Positive Electrode Materials

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Facile Hydrothermal Synthesis of Molybdenum Disulfide (MoS2) as Advanced Electrodes for Super Capacitors Applications

MRS Advances ◽

10.1557/adv.2016.421 ◽

2016 ◽

Vol 1 (45) ◽

pp. 3089-3097 ◽

Cited By ~ 2

Author(s):

H. Adhikari ◽

C. Ranaweera ◽

R. Gupta ◽

S. R. Mishra

Keyword(s):

Reaction Time ◽

Electrochemical Properties ◽

Molybdenum Disulfide ◽

Electrode Materials ◽

Hydrothermal Reaction ◽

Three Dimensional ◽

Electrochemical Performances ◽

X Ray Diffraction ◽

Supercapacitor Applications ◽

Hydrothermal Reaction Time

ABSTRACTA facile hydrothermal method was used to synthesize molybdenum disulfide (MoS2) microspheres. The effect of hydrothermal reaction time on morphology and electrochemical properties of MoS2 microspheres was evaluated. X-ray diffraction showed presence of crystalline MoS2 structure, where content of crystalline phase was observed to increase with hydrothermal reaction time. Electrochemical properties of MoS2 were evaluated using cyclic voltammetry (CV) and galvanostatic charge-discharge in 3M KOH solution. Specific capacitance of nanostructured MoS2 was observed to be between 68 F/g and 346 F/g at different scan rates along with excellent cyclic stability. High power density (∼1200 W/kg) and energy density (∼5 Wh/kg) was observed for MoS2 sample synthesized for 24 hours of hydrothermal reaction time. Overall optimal electrocapactive performance was observed for sample prepared for 24 hours of reaction time. It is demonstrated that the obtained MoS2 microspheres with three-dimensional architecture has excellent electrochemical performances as electrode materials for supercapacitor applications.

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Sonication-Assisted Synthesis of Molybdenum Disulfide Aerogel for the Electrode Materials of Supercapacitors

NANO ◽

10.1142/s1793292019500553 ◽

2019 ◽

Vol 14 (05) ◽

pp. 1950055

Author(s):

Qiang Zhang ◽

Wenyuan He ◽

Yinmin Wang ◽

Dazhao Pei ◽

Xuejun Zheng

Keyword(s):

Specific Surface ◽

Porous Structure ◽

Molybdenum Disulfide ◽

Freeze Drying ◽

Electrode Materials ◽

Hydrothermal Reaction ◽

High Specific Capacitance ◽

Electrochemical Performances ◽

Surface Areas ◽

Charge Discharge

The sonication processing was added in front of the freeze-drying as an intermediate processing before the molybdenum disulfide (MoS2) aerogel was synthesized. It is distinguishing with the traditional hydrothermal reaction to combine the sonication processing and freeze-drying in our method. The structure, morphology, specific surface area and pore size distribution were characterized, and the electrochemical performances were measured in 0.5[Formula: see text]M Na2SO4 electrolyte for the MoS2 aerogel and flower-like MoS2. As for comparison, they are of porous structure and microsphere structure, and their specific surface areas are 55.14[Formula: see text]m2[Formula: see text]g[Formula: see text] and 38.12[Formula: see text]m2[Formula: see text]g[Formula: see text]. The specific capacitances are 166.7[Formula: see text]F[Formula: see text]g[Formula: see text] and 119.2[Formula: see text]F[Formula: see text]g[Formula: see text] at the scan rate of 5[Formula: see text]mV[Formula: see text]s[Formula: see text], and the capacity retentions are 87.7% and 81.6% after 3000 charge/discharge cycles. For the enhanced mechanism, the high specific surface of the MoS2 aerogel causes high specific capacitance, and the unique porous structure could buffer volume expansion to improve retention ability during charge/discharge processes. The MoS2 aerogel may thus be a promising electrode material for supercapacitors.

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Design of Trimetallic Sulfide Hollow Nanocages from Metal-Organic Framework as Electrode Materials for Supercapacitors

Dalton Transactions ◽

10.1039/d1dt02819g ◽

2021 ◽

Author(s):

Xueyan Zhao ◽

Qiong Bi ◽

Cui Yang ◽

Kai Tao ◽

Lei Han

Keyword(s):

Chemical Composition ◽

Transition Metal ◽

Electrochemical Properties ◽

Electrode Materials ◽

Metal Organic Framework ◽

Metal Sulfides ◽

Transition Metal Sulfides ◽

Metal Organic ◽

Organic Framework

Transition metal sulfides (TMSs) are the mostly used electrode materials for supercapacitors (SCs). However, they still suffer from unsatisfactory electrochemical properties. Designing hollow mixed TMS nanostructure with well-defined chemical composition...

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Synthesis and Electrochemical Performances of Nanoscale TiO2 as Anode Material for Lithium Ion Batteries

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1015.438 ◽

2014 ◽

Vol 1015 ◽

pp. 438-441

Author(s):

Ye Jun Zhao ◽

Zu Ting Pan

Keyword(s):

Electrochemical Properties ◽

Electrode Materials ◽

Lithium Ion ◽

Electrochemical Measurement ◽

Electrochemical Performances ◽

Ambient Temperatures ◽

Transmission Electron ◽

Structure Morphology ◽

Anode Electrode ◽

Discharge Capacities

The nanoscale TiO2 was synthesized and their electrochemical properties as the anode electrode materials for rechargeable Li-ion batteries were measured. The structure, morphology and electrochemical properties of the nanoscale TiO2 composites synthesized were characterized in detail by X-ray (XRD), Transmission Electron Microscopy (TEM) and electrochemical measurement. The first discharge capacities were 126 mAh/g for the nanoscale TiO2 at the current density of 100 mA/g at ambient temperatures. The specific capacities were stabilized at around 57mAh/g after 20 cycles.

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A facile synthesis of Ni0.85Se@Cu2-xSe nanorods as high-performance supercapacitor electrode materials

Dalton Transactions ◽

10.1039/d1dt02199k ◽

2021 ◽

Author(s):

Shuling Liu ◽

Rui Wang ◽

Qiuting Wang ◽

Qianhong Tian ◽

Xian Cui

Keyword(s):

Transition Metal ◽

High Performance ◽

Electrode Materials ◽

Electrochemical Performances ◽

Ni Foam ◽

Facile Synthesis ◽

Supercapacitor Electrode ◽

Supercapacitor Electrode Materials ◽

Metal Selenides

Transition-metal selenides is regarded as promising electrode materials due to their superior electrochemical performances for supercapacitors. In this study, nanorod-like hybrid of Ni0.85Se@Cu2-xSe on Ni-foam substrate is successfully synthesized via...

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Application of polyoxometalate derivatives in rechargeable batteries

Journal of Materials Chemistry A ◽

10.1039/c9ta12679a ◽

2020 ◽

Vol 8 (9) ◽

pp. 4593-4628 ◽

Cited By ~ 14

Author(s):

Bo Huang ◽

Dong-Hui Yang ◽

Bao-Hang Han

Keyword(s):

Transition Metal ◽

Electrode Materials ◽

Rechargeable Batteries ◽

Electrochemical Performances ◽

Metal Composites

Various polyoxometalate-derived transition metal composites can be applied as electrode materials in multiple rechargeable batteries with excellent electrochemical performances.

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Double Templating Synthesis and Electrochemical Properties of Carbon Foams

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.347-353.3400 ◽

2011 ◽

Vol 347-353 ◽

pp. 3400-3403

Author(s):

Yang Li ◽

Ming Xian Liu ◽

Li Hua Gan ◽

Liang Yang ◽

Zi Jie Xu ◽

...

Keyword(s):

Electrochemical Properties ◽

Pore Size ◽

Electrode Materials ◽

Soft Template ◽

Electrochemical Performances ◽

Galvanostatic Charge ◽

Hard Template ◽

Pore Size Distributions ◽

Carbon Foams ◽

Charge Discharge

In this paper, we demonstrated the synthesis and electrochemical properties of carbon foams for use as supercapacitor electrode materials. Carbon foams were prepared by double templating method in which emulsion and nanosilica were used as soft template and hard template, respectively. By using Span 80 and Tween 80 as emulsifiers, resorcinol/formaldehyde aqueous solution which contained nanosilica as aqueous phase and 1iquid paraffin as oil phase, an O/W emulsion was obtained. Carbon foams were obtained by emulsion polymerization, carbonization and the subsequent removal of the hard template. The as-prepared carbon foams were characterized by scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) analyzer, and electrochemical workstation. The results indicate that the resultant carbon foams have specific surface area of 160 m2/g, total pore volume of 0.15 cm3/g and possess dual pore size distributions with macropore sizes of 0.5-2.0 μm and the most probable pore size of 4.1 nm. The electrochemical properties of the carbon foams have been investigated by cyclic voltammetry (CV) and galvanostatic charge- discharge with a three-electrode system in electrolyte of 6 mol/L KOH solution. The CV curves of the carbon foams show rectangular-like shape without obvious oxidation-reduction evolution peak, which suggests a typical nonfaradic adsorption/desorption reaction. The carbon foams present linear galvanostatic charge-discharge curve under the current densities of 1.0-5.0 A/g and their specific capacitance values are 60-90 F/g. The good electrochemical performances of carbon foams would provide candidate as electrode materials for supercapacitors.

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