Characterization of gas diffusion electrodes for metal-air batteries

Danner, Timo; Eswara, Santhana; Schulz, Volker P.; Latz, Arnulf

doi:10.1016/j.jpowsour.2016.05.108

Cited by 61 publications

(57 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pressure difference across the GDL (capillary pressure) also has a large influence on the performance of a CO 2 RR system specifically with respect to the location of the triple‐phase boundary, bubble formation in electrolyte, and flooding on the gaseous feed side. As the aqueous electrolyte fills the pores of the GDL to a larger extent, the capillary pressure increases . This in turn hampers transport of gases to and from the catalyst layer, potentially resulting in formation of bubbles of gaseous products on the catalyst layer.…”

Section: Failure Modes Of Co2 Electrolyzer Componentsmentioning

confidence: 99%

Durable Cathodes and Electrolyzers for the Efficient Aqueous Electrochemical Reduction of CO₂

et al. 2020

View full text Add to dashboard Cite

The world emits over 14 gigatons of CO2 in excess of what can be remediated by natural processes annually, contributing to rising atmospheric CO2 levels and increasing global temperatures. The electrochemical reduction of CO2 (CO2RR) to value‐added chemicals and fuels has been proposed as a method for reusing these excess anthropogenic emissions. While state‐of‐the‐art CO2RR systems exhibit high current densities and faradaic efficiencies, research on long‐term electrode durability, necessary for this technology to be implemented commercially, is lacking. Previous reviews have focused mainly on the CO2 electrolyzer performance without considering durability. In this Review, the need for research into high‐performing and durable CO2RR systems is stressed by summarizing the state‐of‐the‐art with respect to durability. Various failure modes observed are also reported and a protocol for standard durability testing of CO2RR systems is proposed.

show abstract

Section: Failure Modes Of Co2 Electrolyzer Componentsmentioning

confidence: 99%

Durable Cathodes and Electrolyzers for the Efficient Aqueous Electrochemical Reduction of CO₂

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Gas diffusion layers serve multiple functions in Zn–air batteries. High‐performance gas diffusion layers need to have high electrical conductivity, favorable surface wettability, and excellent gas diffusion properties, which depends on their thickness, hydrophobicity, and porosity . Some flexible Zn–air batteries require mechanically flexible gas diffusion layers.…”

Section: Air Electrodesmentioning

confidence: 99%

Recent Advances in Materials and Design of Electrochemically Rechargeable Zinc–Air Batteries

Chen

Zhou

Karahan

et al. 2018

Small

206

150

View full text Add to dashboard Cite

The century-old zinc-air (Zn-air) battery concept has been revived in the last decade due to its high theoretical energy density, environmental-friendliness, affordability, and safety. Particularly, electrically rechargeable Zn-air battery technologies are of great importance for bulk applications like electric vehicles, grid management, and portable electronic devices. Nevertheless, Zn-air batteries are still not competitive enough to realize widespread practical adoption because of issues in efficiency, durability, and cycle life. Here, following an introduction to the fundamentals and performance testing techniques, the latest research progress related to electrically rechargeable Zn-air batteries is compiled, particularly new key findings in the last five years (2013-2018). The strategies concerning the development of Zn and air electrodes are in focus. The design of other battery components, namely electrolytes and separators are also discussed. Poor performance of O electrocatalysts and the lack of the long-term stability of Zn electrodes and electrolytes remain major challenges. Finally, recommendations regarding the testing routines and materials design are provided. It is hoped that this up-to-date account will help to shape the future research activities toward the development of practical electrically rechargeable Zn-air batteries with extended lifetime and superior performance.

show abstract

“…A method of modeling electrolyte transport on the continuum scale was already derived and validated . An overview of this method applied to ZABs is provided in the Supporting Information.…”

Section: Model Development and Applicationmentioning

confidence: 99%

Rational Development of Neutral Aqueous Electrolytes for Zinc–Air Batteries

2017

Self Cite

View full text Add to dashboard Cite

Neutral aqueous electrolytes have been shown to extend both the calendar life and cycling stability of secondary zinc–air batteries (ZABs). Despite this promise, there are currently no modeling studies investigating the performance of neutral ZABs. Traditional continuum models are numerically insufficient to simulate the dynamic behavior of these complex systems because of the rapid, orders‐of‐magnitude concentration shifts that occur. In this work, we present a novel framework for modeling the cell‐level performance of pH‐buffered aqueous electrolytes. We apply our model to conduct the first continuum‐scale simulation of secondary ZABs using aqueous ZnCl2–NH4Cl as electrolyte. We first use our model to interpret the results of two recent experimental studies of neutral ZABs, showing that the stability of the pH value is a significant factor in cell performance. We then optimize the composition of the electrolyte and the design of the cell considering factors including pH stability, final discharge product, and overall energy density. Our simulations predict that the effectiveness of the pH buffer is limited by slow mass transport and that chlorine‐containing solids may precipitate in addition to ZnO.

show abstract

Characterization of gas diffusion electrodes for metal-air batteries

Cited by 61 publications

References 65 publications

Durable Cathodes and Electrolyzers for the Efficient Aqueous Electrochemical Reduction of CO₂

Durable Cathodes and Electrolyzers for the Efficient Aqueous Electrochemical Reduction of CO₂

Recent Advances in Materials and Design of Electrochemically Rechargeable Zinc–Air Batteries

Rational Development of Neutral Aqueous Electrolytes for Zinc–Air Batteries

Contact Info

Product

Resources

About

Characterization of gas diffusion electrodes for metal-air batteries

Cited by 61 publications

References 65 publications

Durable Cathodes and Electrolyzers for the Efficient Aqueous Electrochemical Reduction of CO2

Durable Cathodes and Electrolyzers for the Efficient Aqueous Electrochemical Reduction of CO2

Recent Advances in Materials and Design of Electrochemically Rechargeable Zinc–Air Batteries

Rational Development of Neutral Aqueous Electrolytes for Zinc–Air Batteries

Contact Info

Product

Resources

About

Durable Cathodes and Electrolyzers for the Efficient Aqueous Electrochemical Reduction of CO₂

Durable Cathodes and Electrolyzers for the Efficient Aqueous Electrochemical Reduction of CO₂