Rationalized Electroepitaxy toward Scalable Single‐Crystal Zn Anodes

Su, Yiwen; Chen, Buhang; Sun, Yingjie; Xue, Zaikun; Zou, Yuhan; Yang, Dongzi; Sun, Luzhao; Yang, Xianzhong; Li, Chao; Yang, Yujia; Song, Xiuju; Guo, Wenyi; Dou, S. X.; Chao, Dongliang; Liu, Zhongfan; Sun, Jingyu

doi:10.1002/adma.202301410

Cited by 22 publications

(9 citation statements)

References 73 publications

(46 reference statements)

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“…Tafel plots were also recorded to verify the excellent anticorrosion properties of HP-Zn (Figure S21, Supporting Information). [25,26] The HP-Zn symmetric cell exhibited a more positive corrosion potential and a smaller corrosion current. Coulombic efficiency (CE) is one of the key indicators for quantifying the cyclic reversibility of Zn, and HP-Cu was employed as the working electrode (Figure S22, Support-ing Information).…”

Section: Resultsmentioning

confidence: 99%

A Generic “Engraving in Aprotic Medium” Strategy toward Stabilized Zn Anodes

Zou

Qiao

et al. 2023

Advanced Energy Materials

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Zn foil pretreatment is a direct route to alleviating Zn anode instability and maintaining high energy performance in Zn metal batteries. Unfortunately, prevailing methods for achieving an ideal Zn surface texture do not enable durable operation under a large depth of discharge, thus impairing the Zn utilization ratio. Zn etching is a more feasible way to control the surface texture, but this approach remains relatively unexplored. In this study, a general strategy is reported for Zn foil engraving in aprotic media to realize efficient anode pretreatment in terms of stability. These tests are performed using high-valence metal ions (especially Mo 5+ ) in an aprotic environment as the key etchant to render a homogenously-distributed, 3D porous architecture on the Zn foil surface. Comprehensive experimental results and theoretical simulations revealed enhanced Zn nucleation and growth. This specially designed electrode exhibited a long lifespan with a large depth of discharge of 88% in symmetric cells. When assembled with a Zn x V 2 O 5 cathode, the constructed cell demonstrated nearly full capacity retention even under stringent conditions (e.g., an N/P capacity ratio of 5.5). This study demonstrates the potential of a Zn etching pretreatment to address the prototypical instability issues of Zn anodes.

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Section: Resultsmentioning

confidence: 99%

A Generic “Engraving in Aprotic Medium” Strategy toward Stabilized Zn Anodes

Zou

Qiao

et al. 2023

Advanced Energy Materials

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“…We also applied a negative overpotential of −150 mV to the Zn electrode to test the chronoamperometry curve (Figure S9, Supporting Information) and found that the current of the symmetrical cell with Janus separator reached equilibrium faster, preventing 2D diffusion of Zn 2+ and inhibiting dendrite growth. [50] Another important parameter to evaluate the reversibility of Zn plating/stripping is coulombic efficiency (CE). [51] In the Zn||Cu half-cells, we first plated Zn under 1 mA cm −2 with 1 mA h cm −2 ; then, stripped it away up to 1.0 V, as shown in Figure 2c.…”

Section: Resultsmentioning

confidence: 99%

A Functional Janus Ag Nanowires/Bacterial Cellulose Separator for High‐Performance Dendrite‐Free Zinc Anode Under Harsh Conditions

Zheng,

Guo,

Yan

et al. 2023

Advanced Materials

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Aqueous zinc‐ion batteries (AZIBs) offer promising prospects for large‐scale energy storage due to their inherent abundance and safety features. However, the growth of zinc dendrites remains a primary obstacle to the practical industrialization of AZIBs, especially under harsh conditions of high current densities and elevated temperatures. To address this issue, we developed a Janus separator with an exceptionally ultrathin thickness of 29 μm. This Janus separator features the bacterial cellulose (BC) layer on one side and Ag nanowires/bacterial cellulose (AgNWs/BC) layer on the other side. The high zincophilic property and excellent electric/thermal conductivity of AgNWs make them ideal for serving as an ion pump to accelerate Zn2+ transport in the electrolyte, resulting in the greatly improved Zn2+ conductivity, the deposition of homogeneous Zn nuclei, and dendrite‐free Zn. Consequently, the Zn||Zn symmetrical cells with the Janus separator exhibit a stable cycle life of over 1000 hours under 80 mA cm−2 and sustain over 600 hours at 10 mA cm−2 under 50°C. Furthermore, the Janus separator enables excellent cycling stability in AZIBs, aqueous zinc‐ion capacitors (AZICs), and scaled‐up flexible soft‐packaged batteries. Our study demonstrates the potential of functional separators in promoting the application of aqueous zinc batteries, particularly under harsh conditions.This article is protected by copyright. All rights reserved

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“…c) Orientation distribution of single crystal Cu anode before and after Zn plating; Reproduced with permission. [ 118 ] Copyright 2023, John Wiley and Sons. d) Orientation map of Zn foil treated by boric acid; Reproduced with permission.…”

Section: Interfacial Characterizationmentioning

confidence: 99%

“…produced a (111)‐oriented single crystal copper using a temperature‐gradient‐annealing route. [ 118 ] The inverse pole figure (IPF) map with respect to z‐axis direction shows the only (111) orientation, proving the existence of single crystal Cu. Later, the orientation of deposition after 3600 s was also illustrated through EBSD, which showed a perfect (002)‐oriented deposition (Figure 8c).…”

Section: Interfacial Characterizationmentioning

confidence: 99%

Advanced Characterization Techniques on Mechanism Understanding and Effect Evaluation in Zinc Anode Protection

Zhu,

Li,

Rao

et al. 2024

Advanced Energy Materials

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The growing environmental pollution issues and continuous energy dilemma call for high‐performance energy storage systems (ESSs). While the inevitable safety concerns appear and restrict the application of lithium‐ion batteries in large‐scale ESSs. Contrastively, zinc ion batteries (ZIBs) attract increasing attention due to the inherent advantages of high safety, low cost, and environmental friendliness. However, the poor stability and reversibility of Zn anodes bring severe difficulty for its practical application. Considerable efforts are devoted in the anode modification, such as electrolyte adjustment, interfacial engineering, and anode structure design, but there is still a fuzzy field concerning the reaction process, regulation mechanism, and modified effect. Reviewing the history, the development of various electrodes greatly depends on the breakthrough in advanced characterization technologies, while the summarizations of technological advances in the Zn anode are still deficient. Hence, this review concentrates on the recent progress in various characterization techniques and related strategies of anode protection. The information is especially highlighted that each technique can offer the crucial or auxiliary role they play in proving specific issues. Furthermore, the opinions on current limitations and future directions of common characterization techniques are also discussed in detail, aiming to give a comprehensive perspective in designing advanced zinc anodes.

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Rationalized Electroepitaxy toward Scalable Single‐Crystal Zn Anodes

Cited by 22 publications

References 73 publications

A Generic “Engraving in Aprotic Medium” Strategy toward Stabilized Zn Anodes

A Generic “Engraving in Aprotic Medium” Strategy toward Stabilized Zn Anodes

A Functional Janus Ag Nanowires/Bacterial Cellulose Separator for High‐Performance Dendrite‐Free Zinc Anode Under Harsh Conditions

Advanced Characterization Techniques on Mechanism Understanding and Effect Evaluation in Zinc Anode Protection

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