Rapid synthesis of mesoporous NixCo3−x(PO4)2hollow shells showing enhanced electrocatalytic and supercapacitor performance

2014 ◽  
Vol 2 (47) ◽  
pp. 20182-20188 ◽  
Author(s):  
Jingchao Zhang ◽  
Yong Yang ◽  
Zhicheng Zhang ◽  
Xiaobin Xu ◽  
Xun Wang
Keyword(s):  
Energy Conversion ◽  
Electrode Materials ◽  
Cost Effective ◽  
Supercapacitor Electrode ◽  
Rapid Synthesis ◽  
Energy Conversion And Storage ◽  
Supercapacitor Performance ◽  
Supercapacitor Electrode Materials ◽  
And Storage ◽  
Storage Processes

The design of cost-effective electrocatalysts and supercapacitor electrode materials with delicate hierarchical morphologies and enhanced functionalities has great potential in energy conversion and storage processes.

scholarly journals Aggregate-State Effects in the Atomistic Modeling of Organic Materials for Electrochemical Energy Conversion and Storage Devices: A Perspective

Molecules ◽  
2020 ◽  
Vol 25 (9) ◽  
pp. 2233 ◽  
Author(s):  
Sergei Manzhos
Keyword(s):  
Energy Conversion ◽  
Charge Transport ◽  
Electrode Materials ◽  
Organic Materials ◽  
Optoelectronic Devices ◽  
Functional Materials ◽  
Aggregate State ◽  
Energy Conversion And Storage ◽  
Organic Batteries ◽  
And Storage

Development of new functional materials for novel energy conversion and storage technologies is often assisted by ab initio modeling. Specifically, for organic materials, such as electron and hole transport materials for perovskite solar cells, LED (light emitting diodes) emitters for organic LEDs (OLEDs), and active electrode materials for organic batteries, such modeling is often done at the molecular level. Modeling of aggregate-state effects is onerous, as packing may not be known or large simulation cells may be required for amorphous materials. Yet aggregate-state effects are essential to estimate charge transport rates, and they may also have substantial effects on redox potentials (voltages) and optical properties. This paper summarizes recent studies by the author’s group of aggregation effects on the electronic properties of organic materials used in optoelectronic devices and in organic batteries. We show that in some cases it is possible to understand the mechanism and predict specific performance characteristics based on simple molecular models, while in other cases the inclusion of effects of aggregation is essential. For example, it is possible to understand the mechanism and predict the overall shape of the voltage-capacity curve for insertion-type organic battery materials, but not the absolute voltage. On the other hand, oligomeric models of p-type organic electrode materials can allow for relatively reliable estimates of voltages. Inclusion of aggregate state modeling is critically important for estimating charge transport rates in materials and interfaces used in optoelectronic devices or when intermolecular charge transfer bands are important. We highlight the use of the semi-empirical DFTB (density functional tight binding) method to simplify such calculations.

The Place of Biomass-Based Electrode Materials in Next-Generation Energy Conversion and Storage

2021 ◽  
pp. 229-261
Author(s):  
Chioma E. Njoku ◽  
Innocent S. Ike ◽  
Adeolu A. Adediran ◽  
Cynthia C. Nwaeju
Keyword(s):  
Energy Conversion ◽  
Electrode Materials ◽  
Next Generation ◽  
Energy Conversion And Storage ◽  
And Storage

Demystifying Constructive Strategies on Designing Functionalized Lamellar Nb2CTx Nanosheet Membrane Architectures under Confined Space

2022 ◽  
Author(s):  
Wenjihao Hu ◽  
Lei Xie ◽  
Chengyang Zhang ◽  
Jingyi Wang ◽  
Chenyu Qiao ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Water Purification ◽  
Cost Effective ◽  
Confined Space ◽  
Ion Separation ◽  
Energy Conversion And Storage ◽  
Significant Research ◽  
And Storage

Lamellar membranes of Nb2CTx nanosheets have received significant research interests as cost-effective and efficient materials for desalination, water purification, energy conversion and storage, and ion separation. However, the constructive strategies...

A one-step, cost-effective green method to in situ fabricate Ni(OH)2 hexagonal platelets on Ni foam as binder-free supercapacitor electrode materials

2015 ◽  
Vol 3 (5) ◽  
pp. 1953-1960 ◽  
Author(s):  
Lingjie Li ◽  
Jing Xu ◽  
Jinglei Lei ◽  
Jie Zhang ◽  
Frank McLarnon ◽  
...  
Keyword(s):  
High Performance ◽  
Electrode Materials ◽  
Three Dimensional ◽  
Cost Effective ◽  
Ni Foam ◽  
Supercapacitor Electrode ◽  
One Step ◽  
Binder Free ◽  
Supercapacitor Electrode Materials

The Ni(OH)2 hexagonal platelets were in situ fabricated on Ni foam as a binder-free supercapacitor electrode material with high performance and excellent cycling stability by a one-step, cost-effective, green hydrothermal treatment of three-dimensional (3D) Ni foam in a 15 wt% H2O2 aqueous solution.

scholarly journals Biochar from Spent Malt Rootlets and Its Application to an Energy Conversion and Storage Device

Chemosensors ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 57
Author(s):  
John Vakros ◽  
Ioannis D. Manariotis ◽  
Vassilios Dracopoulos ◽  
Dionissios Mantzavinos ◽  
Panagiotis Lianos
Keyword(s):  
Activated Carbon ◽  
Fuel Cell ◽  
Energy Conversion ◽  
Storage Device ◽  
Alkaline Electrolyte ◽  
Energy Storage Device ◽  
Supercapacitor Electrode ◽  
Energy Applications ◽  
Energy Conversion And Storage ◽  
And Storage

Activated carbon obtained from biomass wastes was presently studied in order to evaluate its applicability in an energy storage device. Biochar was obtained by the carbonization of spent malt rootlets and was further processed by mild treatment in NaOH. The final product had a specific surface of 362 m2 g−1 and carried Na, P and a few mineral sites. This material was first characterized by several techniques. Then it was used to make a supercapacitor electrode, which reached a specific capacitance of 156 F g−1. The supercapacitor electrode was combined with a photocatalytic fuel cell, making a simple three-electrode device functioning with a single alkaline electrolyte. This device allows solar energy conversion and storage at the same time, promoting the use of biomass wastes for energy applications.

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