Potentiodynamic passivation of zinc in aqueous KOH solutions

Cabot, Pere Lluı́s; Cortés, M.; Centellas, Francesc; Garrido, José Antonio; Pérez, E.

doi:10.1016/0022-0728(86)90089-6

Cited by 38 publications

(13 citation statements)

References 28 publications

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“…The second performance‐limiting phenomenon is the surface passivation of Zn electrodes. The high concentration Zn(OH) 4 2− in electrolytes might precipitate directly as insulating ZnO on Zn electrode surfaces . The formation of such an oxide layer creates an additional internal resistance to the battery and might also block the access to the electrode surface.…”

Section: Zn Electrodesmentioning

confidence: 99%

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

Chen

Zhou

Karahan

et al. 2018

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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.

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Section: Zn Electrodesmentioning

confidence: 99%

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

Chen

Zhou

Karahan

et al. 2018

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216

150

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“…Over the years, several investigations have analyzed the properties of the passive film and the anodic passivation mechanism in alkaline solution . The passivation of the zinc electrode takes place when the dissolution of zinc induces an excessive concentration of the hydroxide or salt in the electrolyte close to electrode, surpassing the solubility limit that promotes the precipitation and formation of a compact film .…”

Section: Problems Associated To the Zinc Anodementioning

confidence: 99%

Alkaline aqueous electrolytes for secondary zinc-air batteries: an overview

Mainar

Leonet

Bengoechea

et al. 2016

Int. J. Energy Res.

261

192

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Summary New applications and emerging markets in electromobility and large‐scale stationary energy storage require the development of new electrochemical systems with higher energy density than current batteries. Rechargeable metal–air batteries, mainly lithium–air and zinc–air systems, are considered one of the most promising candidates. In contrast to lithium, zinc is abundant, inexpensive and its electrodeposition in aqueous electrolytes is relatively easy. Unfortunately, achieving a rechargeable zinc–air battery is still hindered by various technical problems related to the reversibility and lifetime of the electrodes. The most widely used electrolyte in zinc–air batteries has been the classical aqueous alkaline. In this context and with the main objective of providing a complete overview, we studied a wide number of articles starting from the beginning of the development of secondary zinc–air batteries (1970–1980s) to more recent works, with the aim of compiling all available information. It is essential to revise older papers to find relevant information that may get otherwise forgotten and not taken into account to develop new solutions. This information could also be applied in other storage systems based on zinc as nickel–zinc, zinc hybrid or zinc‐ion. Copyright © 2016 John Wiley & Sons, Ltd.

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“…Moreover, many works have been devoted to the knowledge of the zinc oxidation mechanism, especially the dissolution-passivation phenomenon at low potential because of the technical importance of aqueous alkaline batteries made from this metal [6][7][8][9]. At low potential, the anodic layers are mainly constituted by zincite, ZnO, and zinc hydroxide if the alkaline media is at low carbonate concentration [10][11][12].…”

Section: Introductionmentioning

confidence: 99%