Multi-Dimensional Modeling of Lithium-Air Batteries

2013 ◽  
Author(s):  
Yun Wang ◽  
Sung Chan Cho
Keyword(s):  
High Performance ◽  
Electrochemical Reaction ◽  
High Current Density ◽  
Pore Space ◽  
Uniform Distributions ◽  
Dimensional Modeling ◽  
Voltage Loss ◽  
Air Battery ◽  
Electrode Passivation ◽  
Lithium Air Batteries

In this study, we develop a multi-dimensional model of lithium-air (Li-air) batteries to evaluate their performance. The model consists of a set of partial differential equations of species and charges conservation, in conjunction of the electrochemical reaction kinetics at the reaction interface, and takes into account two major mechanisms of voltage loss due to insoluble discharge products formation: namely, electrode passivation and increased oxygen transport resistance. The model is successfully implemented to numerical simulation of discharging operation of a two-dimensional Li-air battery. Highly non-uniform distributions of oxygen and insoluble products are revealed under high current density. The pore space in the electrode is not fully utilized, particularly under high discharging current operation. The fundamental model and numerical tool are important for developing high-performance Li-air batteries.

Analysis of Li-Air Battery: Voltage Loss due to Insoluble Discharge Formation

2015 ◽  
Author(s):  
Hao Yuan ◽  
Yun Wang
Keyword(s):  
Experimental Data ◽  
Pore Structure ◽  
Battery Voltage ◽  
Air Cathode ◽  
Voltage Loss ◽  
Air Battery ◽  
Electrode Passivation ◽  
Discharge Formation

In this paper, we present analysis of air cathode performance, taking into account both electrode passivation and transport resistance raised by insoluble products. Both effects are theoretically evaluated and compared. Validation is carried out against experimental data under low currents. The effects of electrode pore structure, such as porosity and tortuosity, on both the influence of insoluble precipitates and discharge capability are investigated.

scholarly journals Efficient Catalytic Conversion of Polysulfides by Biomimetic Design of “Branch-Leaf” Electrode for High-Energy Sodium–Sulfur Batteries

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Wenyan Du ◽  
Kangqi Shen ◽  
Yuruo Qi ◽  
Wei Gao ◽  
Mengli Tao ◽  
...  
Keyword(s):  
Active Sites ◽  
High Performance ◽  
Electrochemical Reaction ◽  
Molecular Layer ◽  
Specific Capacity ◽  
High Energy ◽  
Reduction Reaction ◽  
Biomimetic Design ◽  
Co Nanoparticles ◽  
Sodium Sulfur

AbstractRechargeable room temperature sodium–sulfur (RT Na–S) batteries are seriously limited by low sulfur utilization and sluggish electrochemical reaction activity of polysulfide intermediates. Herein, a 3D “branch-leaf” biomimetic design proposed for high performance Na–S batteries, where the leaves constructed from Co nanoparticles on carbon nanofibers (CNF) are fully to expose the active sites of Co. The CNF network acts as conductive “branches” to ensure adequate electron and electrolyte supply for the Co leaves. As an effective electrocatalytic battery system, the 3D “branch-leaf” conductive network with abundant active sites and voids can effectively trap polysulfides and provide plentiful electron/ions pathways for electrochemical reaction. DFT calculation reveals that the Co nanoparticles can induce the formation of a unique Co–S–Na molecular layer on the Co surface, which can enable a fast reduction reaction of the polysulfides. Therefore, the prepared “branch-leaf” CNF-L@Co/S electrode exhibits a high initial specific capacity of 1201 mAh g−1 at 0.1 C and superior rate performance.

scholarly journals High-performance fiber-shaped lithium-ion batteries

2020 ◽  
Vol 92 (5) ◽  
pp. 767-772
Author(s):  
Ye Zhang
Keyword(s):  
Lithium Ion Batteries ◽  
High Performance ◽  
Recent Progress ◽  
Lithium Ion ◽  
Short Review ◽  
Fiber Architecture ◽  
Hybrid Fiber ◽  
High Performance Fiber ◽  
Wearable Products ◽  
Lithium Air Batteries

AbstractThis short review summarizes our recent progress in fiber-shaped lithium-ion batteries and lithium-air batteries based on carbon nanotube hybrid fiber electrodes. The fiber architecture allows batteries to be deformable in all dimensions and bear various deformations such as bending, tying, twisting and even stretching. They are scaled up and further woven into breathable, flexible, stretchable and shape-memory textiles to effectively meet the requirements of modern electronics such as wearable products.

One-step Synthesis of Amorphous Nickel Iron Phosphide Hierarchical Nanostructures for Water Electrolysis with Superb Stability at High Current Density

2021 ◽  
Author(s):  
Yuefeng Yu ◽  
Xun He ◽  
Rong Li ◽  
Xinglong Gou
Keyword(s):  
High Performance ◽  
High Current Density ◽  
Water Electrolysis ◽  
Bifunctional Catalysts ◽  
High Current ◽  
Hierarchical Nanostructures ◽  
Iron Phosphide ◽  
Nickel Iron ◽  
Metal Free ◽  
One Step

Development of noble-metal-free high-performance bifunctional catalysts for both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is essential but challenging for hydrogen production from water electrolysis. Herein, amorphous bimetallic...

One-pot synthesis of FeNxC as efficient catalyst for high-performance zinc-air battery

2021 ◽  
Author(s):  
Yang Li ◽  
Kuanda Xu ◽  
Qi Zhang ◽  
Zhi Zheng ◽  
Shunning Li ◽  
...  
Keyword(s):  
High Performance ◽  
One Pot ◽  
Efficient Catalyst ◽  
One Pot Synthesis ◽  
Air Battery
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