Zn anode with flexible β-PVDF coating for aqueous Zn-ion batteries with long cycle life

Hieu, Luong Trung; So, Seongjoon; Kim, Il Tae; Hur, Jaehyun

doi:10.1016/j.cej.2021.128584

Cited by 211 publications

(114 citation statements)

References 54 publications

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“…[15] What is worse, the ex situ formed artificial protective layer has poor adhesion to Zn, and that readily peels off the ZMAs surface during repeated cycling. [16] Accordingly, in situ engineering of an artificial protective layer with strong interaction with Zn is a better pathway to acquiring dendrite-free and stable ZMAs. [17] Inspired by polymeric protective layer-related research, a variety of polymeric overlayers with abundant functional groups and good flexibility covered on the ZMAs surface have attracted much attention to solving the dendrite formation and side reactions issues.…”

Section: Introductionmentioning

confidence: 99%

Polymeric Molecular Design Towards Horizontal Zn Electrodeposits at Constrained 2D Zn²⁺ Diffusion: Dendrite‐Free Zn Anode for Long‐Life and High‐Rate Aqueous Zinc Metal Battery

Xie

Wang

et al. 2022

Adv Funct Materials

134

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Aqueous zinc metal batteries have garnered unprecedented attention owing to their high theoretical specific capacity, appropriate redox potential, and remarkable sustainability. Nevertheless, the intractable issues induced by the notorious Zn dendrite growth and serious interfacial side reactions significantly impede their large‐scale utilization. Inducing Zn to electrodeposit through parallel arrangement mode is critical to realizing dendrite‐free Zn metal anodes (ZMAs). To realize this purpose, a unique polymeric molecular design strategy through chemically grafting a thin polyanthraquinone (PAQ) overlayer on the Zn surface in the manner of spontaneous polymerization reaction of anthraquinone diazonium tetrafluoroborate (AQN2+BF4−) is proposed firstly. Impressively, thus‐derived PAQ overlayer as an artificial protective layer can constrain the Zn2+ ions 2D diffusion and homogenize the electric field and Zn2+ ions concentration distribution, further guiding preferential growth along the Zn(002) plane. Assisted by the PAQ overlayer, the dendrite growth, H2 evolution reaction, and Zn corrosion on ZMAs are suppressed effectively. Accordingly, such polymeric molecular modified ZMAs ensure a remarkably high Coulombic efficiency of 99.7% at 4 mA cm−2 and achieve a long cycling lifespan up to 1750 h at 1 mA cm−2 and superior rate capability. This work provides a new insight into designing an interface protective layer for achieving highly stable ZMAs.

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Section: Introductionmentioning

confidence: 99%

Polymeric Molecular Design Towards Horizontal Zn Electrodeposits at Constrained 2D Zn²⁺ Diffusion: Dendrite‐Free Zn Anode for Long‐Life and High‐Rate Aqueous Zinc Metal Battery

Xie

Wang

et al. 2022

Adv Funct Materials

134

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“…Finally, the polymer network used for coating Zn anodes must possess abundant polar groups to interact with the metal ions. Considering these requirements, polyvinylidene fluoride (PVDF) has been used to modify the surface of Zn anodes via a facile spin-coating process ( Figure 16 a) [ 123 ]. Under slow evaporation conditions, the F atoms in the PVDF side chains rearrange to form an all-trans conformation known as the β-phase, in which all the dipoles align on the same side.…”

Section: Common Strategies For Modifying the Surface Of Zn Metal Anodesmentioning

confidence: 99%

“… ( a ) Schematic illustration of the β- and α-PVDF coating processes, ( b ) long-term profiles of β-PVDF@Zn (red), α-PVDF@Zn (blue), and bare Zn (black) with symmetrical cells at a current density of ( b ) 0.25–0.05 mAh cm −2 , ( c ) 1.5–0.3 mAh cm −2 . Reprinted with permission from Hieu et al [ 123 ]. Copyright 2021 Elsevier B.V. …”

Section: Figurementioning

confidence: 99%

Zn Metal Anodes for Zn-Ion Batteries in Mild Aqueous Electrolytes: Challenges and Strategies

2021

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Over the past few years, rechargeable aqueous Zn-ion batteries have garnered significant interest as potential alternatives for lithium-ion batteries because of their low cost, high theoretical capacity, low redox potential, and environmentally friendliness. However, several constraints associated with Zn metal anodes, such as the growth of Zn dendrites, occurrence of side reactions, and hydrogen evolution during repeated stripping/plating processes result in poor cycling life and low Coulombic efficiency, which severely impede further advancements in this technology. Despite recent efforts and impressive breakthroughs, the origin of these fundamental obstacles remains unclear and no successful strategy that can address these issues has been developed yet to realize the practical applications of rechargeable aqueous Zn-ion batteries. In this review, we have discussed various issues associated with the use of Zn metal anodes in mildly acidic aqueous electrolytes. Various strategies, including the shielding of the Zn surface, regulating the Zn deposition behavior, creating a uniform electric field, and controlling the surface energy of Zn metal anodes to repress the growth of Zn dendrites and the occurrence of side reactions, proposed to overcome the limitations of Zn metal anodes have also been discussed. Finally, the future perspectives of Zn anodes and possible design strategies for developing highly stable Zn anodes in mildly acidic aqueous environments have been discussed.

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“…The third strategy is to construct an artificial solid electrolyte interphase (SEI) layer by coating a protective layer on the anode surface. Hieu et al [28] prepared a β-poly(vinylidene fluoride) (PVDF) layer on the anode by a simple spin coating method.…”

Section: Introductionmentioning

confidence: 99%

Silk Fibroin Coating Enables Dendrite‐free Zinc Anode for Long‐Life Aqueous Zinc‐Ion Batteries

Yang

Zhang

et al. 2022

ChemSusChem

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Due to the advantages of the low cost of Zn and the safety of aqueous electrolytes, the aqueous Zn ion battery (AZIB) is expected to become the next‐generation battery after lithium‐ion batteries. However, the problems of Zn anode dendrite growth, self‐corrosion, and passivation in AZIBs lead to short cycle life and short circuit of the battery. In this work, uniform and stable Silk II‐silk fibroin (Silk II‐SF) coating was prepared on the surface of Zn anode by a simple method. Experiments showed that the SF coating could prevent dendritic growth and hydrogen evolution corrosion. Therefore, symmetric cells using Silk II‐SF@Zn anode achieved a cycle life over 3300 and 1500 h at current densities of 10 and 20 mA cm−2, respectively. Using Silk II‐SF coating to protect Zn anode is a simple and effective strategy to realize dendrite‐free Zn anode and long‐cycle‐life AZIBs.

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Zn anode with flexible β-PVDF coating for aqueous Zn-ion batteries with long cycle life

Cited by 211 publications

References 54 publications

Polymeric Molecular Design Towards Horizontal Zn Electrodeposits at Constrained 2D Zn²⁺ Diffusion: Dendrite‐Free Zn Anode for Long‐Life and High‐Rate Aqueous Zinc Metal Battery

Polymeric Molecular Design Towards Horizontal Zn Electrodeposits at Constrained 2D Zn²⁺ Diffusion: Dendrite‐Free Zn Anode for Long‐Life and High‐Rate Aqueous Zinc Metal Battery

Zn Metal Anodes for Zn-Ion Batteries in Mild Aqueous Electrolytes: Challenges and Strategies

Silk Fibroin Coating Enables Dendrite‐free Zinc Anode for Long‐Life Aqueous Zinc‐Ion Batteries

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Zn anode with flexible β-PVDF coating for aqueous Zn-ion batteries with long cycle life

Cited by 211 publications

References 54 publications

Polymeric Molecular Design Towards Horizontal Zn Electrodeposits at Constrained 2D Zn2+ Diffusion: Dendrite‐Free Zn Anode for Long‐Life and High‐Rate Aqueous Zinc Metal Battery

Polymeric Molecular Design Towards Horizontal Zn Electrodeposits at Constrained 2D Zn2+ Diffusion: Dendrite‐Free Zn Anode for Long‐Life and High‐Rate Aqueous Zinc Metal Battery

Zn Metal Anodes for Zn-Ion Batteries in Mild Aqueous Electrolytes: Challenges and Strategies

Silk Fibroin Coating Enables Dendrite‐free Zinc Anode for Long‐Life Aqueous Zinc‐Ion Batteries

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Polymeric Molecular Design Towards Horizontal Zn Electrodeposits at Constrained 2D Zn²⁺ Diffusion: Dendrite‐Free Zn Anode for Long‐Life and High‐Rate Aqueous Zinc Metal Battery

Polymeric Molecular Design Towards Horizontal Zn Electrodeposits at Constrained 2D Zn²⁺ Diffusion: Dendrite‐Free Zn Anode for Long‐Life and High‐Rate Aqueous Zinc Metal Battery