Effect of Li+ addition on growth behavior of ZnO during anodic dissolution of Zn negative electrode

Otani, Tomohiro; Yasuda, Tetsuya; Kunimoto, Masahiro; Yanagisawa, Masahiro; Fukunaka, Yasuhiro; Homma, Takayuki

doi:10.1016/j.electacta.2019.03.005

Cited by 10 publications

(8 citation statements)

References 59 publications

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“…LiOH and KOH alone. However, the effect of Li + ions as an additive in regulating Zn/ZnO redox chemistry was shown earlier; herein, we study the importance of the synergistic effect of cations (Li + and K + ) in improving the Zn/ZnO reversibility in ZAB operation.…”

Section: Introductionmentioning

confidence: 82%

Extending the Cyclability of Alkaline Zinc–Air Batteries: Synergistic Roles of Li⁺ and K⁺ Ions in Electrodics

Thakur

Alam

Roy

et al. 2021

ACS Appl. Mater. Interfaces

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Tweaking the electrolyte of the anode compartment of zinc−air battery (ZAB) system is shown to be extending the charge−discharge cyclability of the cell. An alkaline zinc (Zn)− air cell working for ∼32 h (192 cycles) without failure is extended to >55 h (>330 cycles) by modifying the anode compartment with a mixture electrolyte of KOH and LiOH. The cell containing the mixture electrolyte has a low overpotential for charging along with high discharge capacity. The role of Li + ions in tuning the electrode morphology and electrodics is studied both theoretically and experimentally. The synergistic effect of Li + and K + ions in the electrolyte on improved ZAB performance is proven. This study can pave new ways for the commercial implementation of ZAB, where it has already proven its potential in low-cost, high energy density, and mobility applications.

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Section: Introductionmentioning

confidence: 82%

Extending the Cyclability of Alkaline Zinc–Air Batteries: Synergistic Roles of Li⁺ and K⁺ Ions in Electrodics

Thakur

Alam

Roy

et al. 2021

ACS Appl. Mater. Interfaces

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“…Li + is proposed as an effective additive that interacts with reaction intermediates of zinc. Otani et al [136] explored the influence of Li + as an additive on zinc dissolution. It was found that zinc is dissolved from the entire electrode surface after Li + addition rather than a stepflow manner, which is mainly related to the changed double layer structure.…”

Section: Electrolyte Optimizationmentioning

confidence: 99%

Interface Engineering of Zinc Electrode for Rechargeable Alkaline Zinc‐Based Batteries

et al. 2023

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Rechargeable aqueous zinc‐based batteries have gained considerable interest because of their advantages of high theoretical capacity, being eco‐friendly, and cost effectiveness. In particular, zinc‐based batteries with alkaline electrolyte show great promise due to their high working voltage. However, there remain great challenges for the commercialization of the rechargeable alkaline zinc‐based batteries, which are mainly impeded by the limited reversibility of the zinc electrode. The critical problems refer to the dendrites growth, electrode passivation, shape change, and side reactions, affecting discharge capacity, columbic efficiency, and cycling stability of the battery. All the issues are highly associated with the interfacial properties, including both electrons and ions transport behavior at the electrode interface. Herein, this work concentrates on the fundamental electrochemistry of the challenges in the zinc electrode and the design strategies for developing high‐performance zinc electrodes with regard to optimizing the interfaces between host and active materials as well as electrode and electrolyte. In addition, potential directions for the investigation of electrodes and electrolytes for high‐performance zinc‐based batteries are presented, aiming at promoting the development of rechargeable alkaline zinc‐based batteries.

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“…[30] Previously, we have successfully applied in situ Raman measurements to clarify the suppression for crystal growth of ZnO during Zn dissolution via Li + addition. [31] In particular, Shi et al clearly demonstrated the presence of both crystalline ZnO and ZnO with oxygen vacancies (V O ) and Zn interstitials (Zn i ) at different potential steps, [32] by performing in situ Raman measurements with a specially designed cell set up with single particle micro electrodes. [33,34] Therefore, in situ Raman measurements are preferred for the investigation of Zn dissolution−passivation behavior.…”

Section: −mentioning

confidence: 99%

Zn Dissolution−Passivation Behavior with ZnO Formation via In Situ Characterizations

Wang

Kunimoto

Yanagisawa

et al. 2023

Energy & Environ Materials

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In this study, ZnO formation during the dissolution−passivation process of Zn anodes is observed via in situ Raman and optical characterization. The Zn passivation during galvanostatic anodization merely follows the dissolution−precipitation model, whereas that of potentiodynamic polarization exhibits different behaviors in different potential ranges. Initially, the Zn electrode is gradually covered by a ZnO precipitation film and then undergoes solid‐state oxidation at ~255 mV. The starting point of solid‐state oxidation is well indicated by the abrupt current drop and yellow coloration of the electrode surface. During the pseudo passivation, an intense current oscillation is observed. Further, blink‐like color changes between yellow and dark blue are revealed for the first time, implying that the oscillation is caused by the dynamic adsorption and desorption of OH groups. The as‐formed ZnOs then experience a dissolution−reformation evolution, during which the crystallinity of the primary ZnO film is improved but the solid‐state‐formed ZnO layer becomes rich in oxygen vacancies. Eventually, oxide densification is realized, contributing to the Zn passivation. This study provides new insights into the Zn dissolution−passivation behavior, which is critical for the future optimization of Zn batteries.

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Effect of Li+ addition on growth behavior of ZnO during anodic dissolution of Zn negative electrode

Cited by 10 publications

References 59 publications

Extending the Cyclability of Alkaline Zinc–Air Batteries: Synergistic Roles of Li⁺ and K⁺ Ions in Electrodics

Extending the Cyclability of Alkaline Zinc–Air Batteries: Synergistic Roles of Li⁺ and K⁺ Ions in Electrodics

Interface Engineering of Zinc Electrode for Rechargeable Alkaline Zinc‐Based Batteries

Zn Dissolution−Passivation Behavior with ZnO Formation via In Situ Characterizations

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Effect of Li+ addition on growth behavior of ZnO during anodic dissolution of Zn negative electrode

Cited by 10 publications

References 59 publications

Extending the Cyclability of Alkaline Zinc–Air Batteries: Synergistic Roles of Li+ and K+ Ions in Electrodics

Extending the Cyclability of Alkaline Zinc–Air Batteries: Synergistic Roles of Li+ and K+ Ions in Electrodics

Interface Engineering of Zinc Electrode for Rechargeable Alkaline Zinc‐Based Batteries

Zn Dissolution−Passivation Behavior with ZnO Formation via In Situ Characterizations

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Product

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Extending the Cyclability of Alkaline Zinc–Air Batteries: Synergistic Roles of Li⁺ and K⁺ Ions in Electrodics

Extending the Cyclability of Alkaline Zinc–Air Batteries: Synergistic Roles of Li⁺ and K⁺ Ions in Electrodics