scholarly journals Hydrogen/functionalized benzoquinone for a high-performance regenerative fuel cell as a potential large-scale energy storage platform

2020 ◽  
Vol 8 (7) ◽  
pp. 3933-3941 ◽  
Author(s):  
Javier Rubio-Garcia ◽  
Anthony Kucernak ◽  
Andres Parra-Puerto ◽  
Rutao Liu ◽  
Barun Chakrabarti
Keyword(s):  
Energy Storage ◽  
Fuel Cell ◽  
High Performance ◽  
Large Scale ◽  
Redox Species ◽  
Reversible Redox ◽  
Regenerative Fuel Cell

A functionalised benzoquinone redox species is coupled to the hydrogen/proton reaction to achieve a respectable reversible redox fuel cell (RFC).

scholarly journals A germanium and zinc chalcogenide as an anode for a high-capacity and long cycle life lithium battery

RSC Advances ◽  
2019 ◽  
Vol 9 (60) ◽  
pp. 35045-35049
Author(s):  
Xu Chen ◽  
Jian Zhou ◽  
Jiarui Li ◽  
Haiyan Luo ◽  
Lin Mei ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Performance ◽  
Lithium Battery ◽  
Large Scale ◽  
High Capacity ◽  
Lithium Ion ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Long Cycle Life ◽  
Zinc Chalcogenide

High-performance lithium ion batteries are ideal energy storage devices for both grid-scale and large-scale applications.

scholarly journals Tuning the Performance of Aqueous Organic Redox Flow Batteries from First Principles

2020 ◽  
Author(s):  
Junting Yu ◽  
Tianshou Zhao ◽  
Ding Pan
Keyword(s):  
Energy Storage ◽  
First Principles ◽  
High Performance ◽  
Large Scale ◽  
Electrical Energy ◽  
Ab Initio Molecular Dynamics ◽  
Redox Potentials ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Entropy Effects

<div>Aqueous organic redox flow batteries have many appealing properties in the application of large-scale energy storage. The large chemical tunability of organic electrolytes shows great potential to improve the performance of flow batteries. Computational studies at the quantum-mechanics level are very useful to guide experiments, but in previous studies explicit water interactions and thermodynamic effects were ignored. Here, we applied the computational electrochemistry method based on ab initio molecular dynamics to calculate redox potentials of quinones and their derivatives. The calculated results are in excellent agreement with experimental data. We mixed side chains to tune their reduction potentials, and found that solvation interactions and entropy effects play a significant role in side-chain engineering. Based on our calculations, we proposed several high-performance negative and positive electrolytes. Our first-principles study paves the way towards the development of large-scale and sustainable electrical energy storage.</div>

Numerical Model of a Single Phase, Regenerative Fuel Cell

2004 ◽  
Author(s):  
A. Garrard ◽  
S. Beck ◽  
P. Styring
Keyword(s):  
Fuel Cell ◽  
Large Scale ◽  
Single Phase ◽  
Reaction System ◽  
Reduction Reaction ◽  
Dynamic Calculation ◽  
Species Concentration ◽  
Physical Interactions ◽  
Regenerative Fuel Cell ◽  
Future Work

A code for numerical simulating the fluid flow and electrochemistry of a single phase regenerative fuel cell is presented. Due to the potentially tiny geometries and complex multi-physical interactions, modeling presents a chance to obtain detailed quantitative data and much needed understanding about physics within the reactor. The Regenesys XL200 fuel cell has the industrial application of large scale energy storage and is the focus of this work. A two dimensional, binary reduction reaction system has been created to represent the XL200 and test the code. Commercially available CFD software Fluent was used to calculate the flow field and subroutines were used to create the dynamic calculation of electrochemistry at the reaction surface. The effect of changing the total applied potential across the domain on the potential and species concentration distribution within the domain was investigated. Results show that the code is producing qualitatively feasible results that represent the tight multi-physical coupling. The code is currently not validated against physical experimental results and this will be the focus of future work.

scholarly journals Towards High Performance Chemical Vapour Deposition V2O5 Cathodes for Batteries Employing Aqueous Media

Molecules ◽  
2020 ◽  
Vol 25 (23) ◽  
pp. 5558
Author(s):  
Dimitra Vernardou ◽  
Charalampos Drosos ◽  
Andreas Kafizas ◽  
Martyn E. Pemble ◽  
Emmanouel Koudoumas
Keyword(s):  
Energy Storage ◽  
High Performance ◽  
Large Scale ◽  
Electrode Materials ◽  
Low Cost ◽  
Aqueous Media ◽  
Chemical Vapour ◽  
Cost Effective ◽  
Scale Production ◽  
Environmentally Safe

The need for clean and efficient energy storage has become the center of attention due to the eminent global energy crisis and growing ecological concerns. A key component in this effort is the ultra-high performance battery, which will play a major role in the energy industry. To meet the demands in portable electronic devices, electric vehicles, and large-scale energy storage systems, it is necessary to prepare advanced batteries with high safety, fast charge ratios, and discharge capabilities at a low cost. Cathode materials play a significant role in determining the performance of batteries. Among the possible electrode materials is vanadium pentoxide, which will be discussed in this review, due to its low cost and high theoretical capacity. Additionally, aqueous electrolytes, which are environmentally safe, provide an alternative approach compared to organic media for safe, cost-effective, and scalable energy storage. In this review, we will reveal the industrial potential of competitive methods to grow cathodes with excellent stability and enhanced electrochemical performance in aqueous media and lay the foundation for the large-scale production of electrode materials.

Flower-Like MoS2 for Next-Generation High-Performance Energy Storage Device Applications

2019 ◽  
Vol 25 (6) ◽  
pp. 1394-1400 ◽  
Author(s):  
Sumit Majumder ◽  
Sangam Banerjee
Keyword(s):  
Electron Microscopy ◽  
Energy Storage ◽  
High Performance ◽  
Large Scale ◽  
Electrochemical Impedance ◽  
Coupling Effect ◽  
Storage Device ◽  
Active Surface Area ◽  
Cyclic Voltammogram ◽  
Discharge Current Density

AbstractHere, a well crystalline 3D flower-like structured MoS2 (~420 nm) has been successfully synthesized on a large scale by a simple hydrothermal technique. The evolution of morphology in the formation process has also been investigated. The crystallinity, purity, and morphology of the sample are characterized by powder X-ray diffraction, Fourier-transform infrared spectroscopy, fieldemission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM) techniques. The FESEM and TEM images reveal that the sample exhibits a uniform 3D flower-like microsphere shape with folded nanosheets, which are stretched out along the edge of the microsphere. The electrochemical performance of the sample has been investigated by cyclic voltammogram, galvanostatic charge–discharge, and electrochemical impedance spectroscopy studies. The results of the electrochemical analysis suggest that the material delivers a maximum specific capacitance (Csp) of 350 F/g at a discharge current density of 0.25 A/g with energy density 17.5 Wh/kg. It also exhibits good capability and excellent cyclic stability (94% capacity retention after 1,000 cycles in 1 A/g) owing to the coupling effect of electrical conductivity with the interesting morphology and larger active surface area. Hence, the sample may be used as a promising electrode material for high-performance energy storage devices.

scholarly journals A low temperature unitized regenerative fuel cell realizing 60% round trip efficiency and 10 000 cycles of durability for energy storage applications

2020 ◽  
Vol 13 (7) ◽  
pp. 2096-2105 ◽  
Author(s):  
Yagya N. Regmi ◽  
Xiong Peng ◽  
Julie C. Fornaciari ◽  
Max Wei ◽  
Deborah J. Myers ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Energy Storage ◽  
Fuel Cell ◽  
Low Temperature ◽  
Round Trip ◽  
Catalyst Layers ◽  
Energy Storage Applications ◽  
Regenerative Fuel Cell

Unitized regenerative fuel cells with oxygen reactions occurring on different catalyst layers can achieve 60% round trip efficiencies at 1 A cm−2.

Synergistic Effects of B/S Co-doped Spongy-like Hierarchically Porous Carbon for High Performance Zinc-ion Hybrid Capacitor

Nanoscale ◽  
2022 ◽  
Author(s):  
Xiaopeng Zhang ◽  
Yingge Zhang ◽  
Jialong Qian ◽  
Yihe Zhang ◽  
Li Sun ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Performance ◽  
Large Scale ◽  
Synergistic Effects ◽  
Zinc Ion ◽  
Potential Candidate ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Hybrid Capacitors ◽  
Co Doped

Zinc-ion hybrid capacitors (ZIHCs) are regarded as a potential candidate for large-scale energy storage devices. However, the inadequate cathode and the inferior wettability between the electrode and electrolyte hinder the...

Significant Contribution of Single Atomic Mn Implanted in Carbon Nanosheets to High-performance Sodium-ion Hybrid Capacitors

2021 ◽  
Author(s):  
Xiang Hu ◽  
Genxiang Wang ◽  
Junwei Li ◽  
Junheng Huang ◽  
Yangjie Liu ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Performance ◽  
Large Scale ◽  
Significant Contribution ◽  
Electrochemical Capacitors ◽  
Sodium Ion ◽  
Great Promise ◽  
Sodium Ion Batteries ◽  
Carbon Nanosheets ◽  
Hybrid Capacitors

Sodium-ion hybrid capacitors (SIHCs) hold great promise in large-scale energy storage by compromising the merits of sodium-ion batteries and electrochemical capacitors, the mismatch of kinetic and capacity between battery-type anode...

High-performance AEM unitized regenerative fuel cell using Pt-pyrochlore as bifunctional oxygen electrocatalyst

2021 ◽  
Vol 118 (40) ◽  
pp. e2107205118
Author(s):  
Pralay Gayen ◽  
Sulay Saha ◽  
Xinquan Liu ◽  
Kritika Sharma ◽  
Vijay K. Ramani
Keyword(s):  
Fuel Cell ◽  
High Performance ◽  
Reduction Reaction ◽  
Anion Exchange Membrane ◽  
Round Trip ◽  
Activity Profile ◽  
Air Battery ◽  
Orr Activity ◽  
Regenerative Fuel Cell ◽  
Exchange Membrane

The performance of fixed-gas unitized regenerative fuel cells (FG-URFCs) are limited by the bifunctional activity of the oxygen electrocatalyst. It is essential to have a good bifunctional oxygen electrocatalyst which can exhibit high activity for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). In this regard, Pt-Pb2Ru2O7-x is synthesized by depositing Pt on Pb2Ru2O7-x wherein Pt individually exhibits high ORR while Pb2Ru2O7-x shows high OER and moderate ORR activity. Pt-Pb2Ru2O7-x exhibits higher OER (η@10mAcm-2 = 0.25 ± 0.01 V) and ORR (η@-3mAcm-2 = -0.31 ± 0.02 V) activity in comparison to benchmark OER (IrO2, η@10mAcm-2 = 0.35 ± 0.02 V) and ORR (Pt/C, η@-3mAcm-2 = -0.33 ± 0.02 V) electrocatalysts, respectively. Pt-Pb2Ru2O7-x shows a lower bifunctionality index (η@10mAcm-2, OER− η@-3mAcm-2, ORR) of 0.56 V with more symmetric OER–ORR activity profile than both Pt (>1.0 V) and Pb2Ru2O7-x (0.69 V) making it more useful for the AEM (anion exchange membrane) URFC or metal-air battery applications. FG-URFC tested with Pt-Pb2Ru2O7-x and Pt/C as bifunctional oxygen electrocatalyst and bifunctional hydrogen electrocatalyst, respectively, yields a mass-specific current density of 715 ± 11 A/gcat-1 at 1.8 V and 56 ± 2 A/gcat-1 at 0.9 V under electrolyzer mode and fuel-cell mode, respectively. The FG-URFC shows a round-trip efficiency of 75% at 0.1 A/cm−2, underlying improvement in AEM FG-URFC electrocatalyst design.

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