Super-resolved dynamics of isolated zinc formation during extremely fast electrochemical deposition/dissolution processes

Mao, Jiaxin; Saqib, Muhammad; Xu, Jiantie; Hao, Rui

doi:10.1039/d2sc04877a

Cited by 11 publications

(10 citation statements)

References 52 publications

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“…[ 18 ] 3) Dead Zn generation gradually reducing the Zn 2+ concentration, impacting the electrolyte conductivity. [ 19 ] 4) The excessive presence of dead Zn during the discharge process leads to Zn metal complete depletion. Once the reaction continues, hydrolysis can be triggered.…”

Section: Resultsmentioning

confidence: 99%

Overcoming Challenges: Extending Cycle Life of Aqueous Zinc‐Ion Batteries at High Zinc Utilization through a Synergistic Strategy

Xu,

Feng,

et al. 2023

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Aqueous zinc‐ion batteries (AZIBs) face challenges in achieving high energy density compared to conventional lithium‐ion batteries (LIBs). The lower operating voltage and excessive Zn metal as anode pose constraints on the overall energy storage capacity of these batteries. An effective approach is to reduce the thickness of the Zn metal anode and control its mass appropriately. However, under the condition of using a thin Zn anode, the performance of AZIBs is often unsatisfactory. Through experiments and computational simulations, the electrode structural change and the formation of dead Zn as the primary reasons for the failure of batteries under a high Zn utilization rate are identified. Based on this understanding, a universal synergistic strategy that combines Cu foil current collectors and electrolyte additives to maintain the structural and thermodynamic stability of the Zn anode under a high Zn utilization rate (ZUR) is proposed. Specifically, the Cu current collectors can ensure that the Zn anode structure remains intact based on the spontaneous filling effect, while the additives can suppress parasitic side reactions at the interface. Ultimately, the symmetric cell demonstrates a cycling duration of 900 h at a 70% ZU, confirming the effectiveness of this strategy.

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Section: Resultsmentioning

confidence: 99%

Overcoming Challenges: Extending Cycle Life of Aqueous Zinc‐Ion Batteries at High Zinc Utilization through a Synergistic Strategy

Xu,

Feng,

et al. 2023

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Section: Ommentioning

confidence: 99%

“…The i‐Zn is the isolated zinc fragments detached from the current collector during the discharge process, also known as the “dead zinc.” As shown in Figure 3f, Mao et al indicated that the i‐Zn was generated during the zinc dendrites dissolution process in forms of macroscopic (200 nm–1 μm) and nanoscopic (below 200 nm), [ 79 ] as the breaking down of the passivation layer. The macro/nanoscopic i‐Zn can slip into the cracks.…”

Section: In Situ Visualizing Characterizationsmentioning

confidence: 99%

“…The second‐growth zinc dendrites were formed from the detached zinc dendrites fractions generated by dissolving zinc dendrites, similar to the previously mentioned i‐Zn. [ 79 ] The number density of the second‐growth zinc dendrites was also higher than those of the initial zinc dendrites. In addition, the zinc dendrites grew lower under higher current density (c.a.…”

Section: In Situ Visualizing Characterizationsmentioning

confidence: 99%

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In situ characterizations for aqueous rechargeable zinc batteries

et al. 2023

Carbon Neutralization

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Recently, aqueous rechargeable zinc batteries (ARZBs) have become a hot topic in secondary batteries. Constant attention has witnessed the development of ARZBs, such as active materials, reaction mechanisms, and mass transport, and huge successes have been achieved. However, as the fundamental basis of battery monitoring in real‐time and the theories of ARZBs, the in situ characterization techniques are equally worth discussing but the relevant review remains missing. Herein, this review focuses on the in situ characterization techniques of visualization and spectroscopy characterizations for ARZBs. Typical research of the in situ techniques is comprehensively discussed, including the setup of the in situ cells, the working principle of characterizations, the application, and the analysis applied in ARZBs. With the help of in situ characterizations, the reaction dynamics, transport kinetics, and thermodynamics in ARZBs can be thoroughly researched. Finally, the current primary challenges and future opportunities faced by in situ techniques toward ARZBs are also summarized.

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“…Moreover, OM-which is suitable for studying dynamic electrodeposition 53,54 -has been used to investigate the metal electrodeposition behaviour and morphological evolution. [55][56][57] However, direct and detailed observation of the processes occurring on the metal electrode surface is hindered by the obstructive nature of the metal electrodes. 58 Nevertheless, a few methods can be employed to study the evolution of compounds by observing the electrodeelectrolyte interface with high spatial as well as chemical resolutions.…”

Section: Introductionmentioning

confidence: 99%

Direct imaging of dynamic heterogeneous lithium–gold interaction at the electrochemical interface during the charging/discharging processes

Mao,

Li,

et al. 2024

Chem. Sci.

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Super-resolved dynamics of isolated zinc formation during extremely fast electrochemical deposition/dissolution processes

Abstract: The development of zinc-air batteries with high-rate capability and long lifespan is critically important for their practical use, especially in smart grid and electric vehicle application. The formation of isolated...

Cited by 11 publications

References 52 publications

Overcoming Challenges: Extending Cycle Life of Aqueous Zinc‐Ion Batteries at High Zinc Utilization through a Synergistic Strategy

Overcoming Challenges: Extending Cycle Life of Aqueous Zinc‐Ion Batteries at High Zinc Utilization through a Synergistic Strategy

In situ characterizations for aqueous rechargeable zinc batteries

Direct imaging of dynamic heterogeneous lithium–gold interaction at the electrochemical interface during the charging/discharging processes

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