Space-charge polarization by confined ion migration in microstructured solid dielectrics

Idiart, Martín I.; Bottero, Cristian J.

doi:10.1016/j.jmps.2018.08.003

Cited by 5 publications

(1 citation statement)

References 36 publications

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“…Additionally, the dielectric constant exhibits a decreasing trend with increasing frequency, which can be attributed to the sluggish response of charge in dielectric materials under rapidly changing electric fields. [30,31] Therefore, it can be demonstrated that DF-HfO 2 and D-HfO 2-x are capable of inducing space charge polarization. To demonstrate the insulating properties of the prepared material, the conductivities of Zn metal, DF-HfO 2 and D-HfO 2-x were measured using a high resistance meter.…”

Section: Resultsmentioning

confidence: 99%

Defect‐Rich Functional HfO_2‐x for Highly Reversible Zn Metal Anode

Zhang,

Li,

Liu

et al. 2023

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Interface engineering attracted tremendous attention owing to its remarkable ability to impede dendrite growth and side reactions in aqueous zinc‐ion batteries. Artificial interface layers composed of crystalline materials have been extensively employed to stabilize the Zn anode. However, the diffusion kinetics of Zn2+ in highly crystalline materials are hindered by steric effects from the lattice, thereby limiting the high‐rate performance of the cell. Here, defect‐rich HfO2‐x polycrystals derived from metal‐organic frameworks (MOFs) (D‐HfO2‐x) are developed to enhance the Zn deposition behavior. The discrepancy of dielectric constants between metallic Zn and HfO2 enables the building of an electrostatic shielding layer for uniform Zn deposition. More importantly, the oxygen vacancies in D‐HfO2‐x provide abundant active sites for Zn2+ adsorption, accelerating the kinetics of Zn2+ migration, which contributes to the preferential exposure of the Zn (002) plane during plating. Consequently, the D‐HfO2‐x‐modified Zn anode delivers ultrastable durability of over 5000 h at 1 mA cm−2 and a low voltage hysteresis of 30 mV. The constructed defective coating provides a guarantee for the stable operation of Zn anodes, and the innovative approach of defective engineering also offers new ideas for the protection of other energy storage devices.

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Section: Resultsmentioning

confidence: 99%

Defect‐Rich Functional HfO_2‐x for Highly Reversible Zn Metal Anode

Zhang,

Li,

Liu

et al. 2023

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Functional Natural Aluminum Silicate Hydroxide Based Separators Enable Stable Zinc Metal Anodes with Long Cycle Life

Liu,

Fang,

et al. 2024

Adv Funct Materials

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Benefiting from high safety, low cost, and competitive energy density, aqueous zinc ion batteries (AZIBs) have emerged as very promising technology for grid energy storage. However, the lifetime of AZIBs is severely affected by uncontrolled zinc dendritic growth and undesirable side reaction. To address the problem, natural aluminum silicate hydroxide covered glass fibers separator (AlSi‐GF) is prepared herein using a simple spraying method. Aluminum silicate hydroxide is a complex oxide, where a large number of adsorption sites can adsorb Zn2+ and guide its deposition process. In particular, the Maxwell–Wagner polarization of aluminum silicate hydroxide under an applied electric field contributes to homogenizing the electric field distribution around the interface, thereby modulating zinc deposition and reducing the nucleation overpotential. Impressively, AlSi‐GF separator enables high‐performance zinc‐metal batteries. The symmetric battery with AlSi‐GF separator has a stable voltage polarization and an ultra‐long cycle life of 2280 h at a current density of 1 mA cm−2, and the Zn//V2O5 full cell based on AlSi‐GF separator can exhibit a high specific capacity of 123 mAh g−1 after 1500 cycles at 1 A g−1. This study provides new insights into the design of reliable and cost‐effective separators for metal anodes in energy storage devices.

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Growth dynamics of CBD-assisted CuS nanostructured thin-film: optical, dielectric and novel switchable device applications

Govindasamy

Pal

Elkodous

et al. 2019

J Mater Sci: Mater Electron

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Space-charge polarization by confined ion migration in microstructured solid dielectrics

Cited by 5 publications

References 36 publications

Defect‐Rich Functional HfO_2‐x for Highly Reversible Zn Metal Anode

Defect‐Rich Functional HfO_2‐x for Highly Reversible Zn Metal Anode

Functional Natural Aluminum Silicate Hydroxide Based Separators Enable Stable Zinc Metal Anodes with Long Cycle Life

Growth dynamics of CBD-assisted CuS nanostructured thin-film: optical, dielectric and novel switchable device applications

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Space-charge polarization by confined ion migration in microstructured solid dielectrics

Cited by 5 publications

References 36 publications

Defect‐Rich Functional HfO2‐x for Highly Reversible Zn Metal Anode

Defect‐Rich Functional HfO2‐x for Highly Reversible Zn Metal Anode

Functional Natural Aluminum Silicate Hydroxide Based Separators Enable Stable Zinc Metal Anodes with Long Cycle Life

Growth dynamics of CBD-assisted CuS nanostructured thin-film: optical, dielectric and novel switchable device applications

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Product

Resources

About

Defect‐Rich Functional HfO_2‐x for Highly Reversible Zn Metal Anode

Defect‐Rich Functional HfO_2‐x for Highly Reversible Zn Metal Anode