Engineering Oxygen Vacancies in CoO@Co3O4/C Nanocomposites for Enhanced Electrochemical Performances

Nanoscale ◽  
2021 ◽  
Author(s):  
Hongqi Chu ◽  
Dan Zhang ◽  
Pan pan Feng ◽  
yulong Gu ◽  
Peng Chen ◽  
...  
Keyword(s):  
Energy Storage ◽  
Oxygen Vacancies ◽  
Energy Storage And Conversion ◽  
Electrochemical Performances ◽  
Electrocatalyst Materials

Efficient electrocatalyst materials for several applications, including energy storage and conversion, have become vitally for achieving technological. In this work, a CoO@Co3O4/C composites with abundant oxygen vacancies was successfully synthesized....

Nanostructured Materials for the Realization of Electrochemical Energy Storage and Conversion Devices

2017 ◽  
pp. 1719-1758
Author(s):  
Imran Shakir ◽  
Zahid Ali ◽  
Usman Ali Rana ◽  
Ayman Nafady ◽  
Mansoor Sarfraz ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Performance ◽  
Structural Characteristics ◽  
Lithium Ion ◽  
Modern World ◽  
Energy Storage And Conversion ◽  
Maximum Output ◽  
Increasing Demand ◽  
Almost All ◽  
Electrocatalyst Materials

One of the greatest challenges for the modern world is the ever-increasing demand of energy, which may soon outstrip the amount of natural resources that can be obtained using currently known energy conversion and energy storage technologies such as solar cells, fuel cells, lithium ion batteries, and supercapacitors. It appears that the maximum output efficiencies of these devices have already reached the intrinsic limits of almost all electrocatalyst materials. Hence, it is a high time to think about new material architectures by controlling size, shape, and geometry, as well as composition that can potentially make a significant improvement in the performance of these electrochemical devices. Among several known electrocatalyst materials are nanomaterials and their composites due to their unique electrical, mechanical, physical, chemical, and structural characteristics. These materials have opened a whole new territory of possibilities in designing high performance energy storage and conversion devices. In this chapter, the authors review the recent progress in energy storage and conversion devices that utilize various nanomaterials and their composite materials and identify future directions in which the field is likely to develop.

Nanostructured Materials for the Realization of Electrochemical Energy Storage and Conversion Devices

2014 ◽  
pp. 376-413
Author(s):  
Imran Shakir ◽  
Zahid Ali ◽  
Usman Ali Rana ◽  
Ayman Nafady ◽  
Mansoor Sarfraz ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Performance ◽  
Structural Characteristics ◽  
Lithium Ion ◽  
Modern World ◽  
Energy Storage And Conversion ◽  
Maximum Output ◽  
Increasing Demand ◽  
Almost All ◽  
Electrocatalyst Materials

One of the greatest challenges for the modern world is the ever-increasing demand of energy, which may soon outstrip the amount of natural resources that can be obtained using currently known energy conversion and energy storage technologies such as solar cells, fuel cells, lithium ion batteries, and supercapacitors. It appears that the maximum output efficiencies of these devices have already reached the intrinsic limits of almost all electrocatalyst materials. Hence, it is a high time to think about new material architectures by controlling size, shape, and geometry, as well as composition that can potentially make a significant improvement in the performance of these electrochemical devices. Among several known electrocatalyst materials are nanomaterials and their composites due to their unique electrical, mechanical, physical, chemical, and structural characteristics. These materials have opened a whole new territory of possibilities in designing high performance energy storage and conversion devices. In this chapter, the authors review the recent progress in energy storage and conversion devices that utilize various nanomaterials and their composite materials and identify future directions in which the field is likely to develop.

Sandwich-like SnS2/graphene multilayers for efficient lithium/sodium storages

2021 ◽  
Author(s):  
Jiande Liu ◽  
Yingfan Chang ◽  
Chen Chen ◽  
Pengqian Guo ◽  
Kai Sun ◽  
...  
Keyword(s):  
Energy Storage ◽  
2D Materials ◽  
Energy Storage And Conversion ◽  
Electrochemical Performances

2D materials have attracted extensive attention in energy storage and conversion owing to their excellent electrochemical performances. Here, we report an utilization of monolayer SnS2 sheets within SnS2/graphene multilayers for...

Recent Advances and Need of Green Synthesis in Two-Dimensional Materials for Energy Conversion and Storage Applications

2021 ◽  
Vol 16 ◽  
Author(s):  
Joice Sophia Ponraj ◽  
Muniraj Vignesh Narayanan ◽  
Ranjith Kumar Dharman ◽  
Valanarasu Santiyagu ◽  
Ramalingam Gopal ◽  
...  
Keyword(s):  
Energy Storage ◽  
Green Synthesis ◽  
2D Materials ◽  
Synthesis Method ◽  
Energy Storage And Conversion ◽  
Two Dimensional ◽  
Severe Problem ◽  
Energy Conversion And Storage ◽  
Energy Application ◽  
The Impact

: Increasing energy crisis across the globe requires immediate solutions. Two-dimensional (2D) materials are in great significance because of its application in energy storage and conversion devices but the production process significantly impacts the environment thereby posing a severe problem in the field of pollution control. Green synthesis method provides an eminent way of reduction in pollutants. This article reviews the importance of green synthesis in the energy application sector. The focus of 2D materials like graphene, MoS2, VS2 in energy storage and conversion devices are emphasized based on supporting recent reports. The emerging Li-ion batteries are widely reviewed along with their promising alternatives like Zn, Na, Mg batteries and are featured in detail. The impact of green methods in the energy application field are outlined. Moreover, future outlook in the energy sector is envisioned by proposing an increase in 2D elemental materials research.

Synthesis and Electrochemical Properties of NiFe-Se/rGO Nanocomposites

2020 ◽  
Vol 13 ◽  
Author(s):  
Rouwei Yan ◽  
Biao Xu ◽  
K. P. Annamalai ◽  
Tianlu Chen ◽  
Zhiming Nie ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Graphene Oxide ◽  
Energy Storage ◽  
Synergistic Effects ◽  
Nitrogen Adsorption ◽  
Storage Device ◽  
Energy Storage And Conversion ◽  
Step Method ◽  
Practical Applications ◽  
Device Applications

Background : Renewable energies are in great demand because of the shortage of traditional fossil energy and the associated environmental problems. Ni and Se-based materials are recently studied for energy storage and conversion owing to their reasonable conductivities and enriched redox activities as well as abundance. However, their electrochemical performance is still unsatisfactory for practical applications. Objective: To enhance the capacitance storage of Ni-Se materials via modification of their physiochemical properties with Fe. Methods: A two-step method was carried out to prepare FeNi-Se loaded reduced graphene oxide (FeNi-Se/rGO). In the first step, metal salts and graphene oxide (GO) were mixed under basic condition and autoclaved to obtain hydroxide intermediates. As a second step, selenization process was carried out to acquire FeNi-Se/rGO composites. Results: X-ray diffraction measurements (XRD), nitrogen adsorption at 77K, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were carried out to study the structures, porosities and the morphologies of the composites. Electrochemical measurements revealed that FeNi-Se/rGO notably enhanced capacitance than the NiSe/G composite. This enhanced performance was mainly attributed to the positive synergistic effects of Fe and Ni in the composites, which not only had influence on the conductivity of the composite but also enhanced redox reactions at different current densities. Conclusion: NiFe-Se/rGO nanocomposites were synthesized in a facile way. The samples were characterized physicochemically and electrochemically. NiFeSe/rGO giving much higher capacitance storage than the NiSe/rGO explained that the nanocomposites could be an electrode material for energy storage device applications.

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