Simultaneously enhancing ionic conductivity and interfacial stability by Fe2O3 for solid-state sodium metal batteries

Xu, Jicheng; Tao, Huachao; Deng, Zerong; Yang, Xuelin; Fan, Li-Zhen

doi:10.1016/j.jmat.2024.01.003

Journal of Materiomics

2024

DOI: 10.1016/j.jmat.2024.01.003

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Simultaneously enhancing ionic conductivity and interfacial stability by Fe2O3 for solid-state sodium metal batteries

Jicheng Xu,

Huachao Tao,

Zerong Deng

et al.

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Cited by 3 publications

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A Multifunctional Na_xBi/NaCl Flexible Interface Layer for Solid‐State Na Metal Batteries

Gu,

Ma,

Fan

et al. 2024

Adv Funct Materials

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Na3Zr2Si2PO12 (NZSP) electrolyte with excellent air stability and acceptable ionic conductivity demonstrates a significant potential for application in solid‐state Na metal batteries. However, the poor interfacial contact between NZSP and Na anode has severely hindered its practical application. Herein, a BiCl3/polytetrafluoroethylene flexible interface layer is constructed between NZSP and Na metal anode. BiCl3 can react with Na metal to form a multifunctional NaxBi/NaCl‐rich flexible interface layer during the cycling process, which can effectively enhance the interfacial contact, avoid the formation of voids and reduce the interfacial resistance. NaxBi with low energy barrier can provide fast Na+ diffusion path, and NaCl with a wide band gap can inhibit electron injection and suppress Na dendrite growth. Owing to the multifunctional NaxBi/NaCl flexible interface layer, the Na/BiCl3@NZSP/Na symmetric cell exhibits a reduced interfacial resistance from 1252.1 to 67.6 Ω and achieves a high critical current density of 2 mA cm⁻2 at 25 °C. At 0.1 mA cm⁻2/0.1 mAh cm⁻2 and 0.3 mA cm⁻2/0.3 mAh cm⁻2, the symmetric cell can stably cycle for 3000 and 1100 h. Additionally, the Na3V2(PO4)3/BiCl3@NZSP/Na full cell can retain 96.7% of initial capacity (≈111 mAh g−1) after 300 cycles at 0.5 C and excellent rate capability.

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A Multifunctional Na_xBi/NaCl Flexible Interface Layer for Solid‐State Na Metal Batteries

Gu,

Ma,

Fan

et al. 2024

Adv Funct Materials

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Liquid Metal Interlayer for Ultrastable Solid‐State Sodium Metal Battery

Gu,

Tao,

Yang

2024

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Solid‐state sodium metal batteries have attracted wide attention due to their high energy density, remarkable safety, and abundant sodium resources. However, the growth of Na dendrites and poor interfacial contact between Na metal anode and Na3Zr2Si2PO12 (NZSP) solid‐state electrolytes severely limit their practical application. Herein, a wettable liquid metal (GaIn) interlayer significantly reduces the interfacial resistance and avoids the formation of voids at the Na/NZSP interface. Moreover, the Ga4Na and NaIn alloys at the interface caused by the spontaneous reaction of GaIn with Na metal enhance the bond of NZSP with Na anode, which provides a continuous Na+ diffusion pathway and homogeneous Na+ flux to suppress Na dendrite growth. The symmetric cell can cycle stably for over 6500 h at 0.05 mA cm−2 and over 3000 h at 0.1 mA cm−2, with a critical current density of 0.8 mA cm−2 at 25 °C, and the interfacial resistance is significantly reduced to 21.6 Ω from 1095.1 Ω. The full cell coupled with NaNi1/3Fe1/3Mn1/3O2 also shows outstanding cycling performance, maintaining 85.1% capacity after 100 cycles at 0.5 C. This work demonstrates that the liquid metal interlayer has a large potential for the practical application of solid‐state metal batteries.

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Confining WS2 hierarchical structures into carbon core-shells for enhanced sodium storage

Zhao,

Suo,

et al. 2025

Journal of Colloid and Interface Science

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Simultaneously enhancing ionic conductivity and interfacial stability by Fe2O3 for solid-state sodium metal batteries

Cited by 3 publications

References 52 publications

A Multifunctional Na_xBi/NaCl Flexible Interface Layer for Solid‐State Na Metal Batteries

A Multifunctional Na_xBi/NaCl Flexible Interface Layer for Solid‐State Na Metal Batteries

Liquid Metal Interlayer for Ultrastable Solid‐State Sodium Metal Battery

Confining WS2 hierarchical structures into carbon core-shells for enhanced sodium storage

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Simultaneously enhancing ionic conductivity and interfacial stability by Fe2O3 for solid-state sodium metal batteries

Cited by 3 publications

References 52 publications

A Multifunctional NaxBi/NaCl Flexible Interface Layer for Solid‐State Na Metal Batteries

A Multifunctional NaxBi/NaCl Flexible Interface Layer for Solid‐State Na Metal Batteries

Liquid Metal Interlayer for Ultrastable Solid‐State Sodium Metal Battery

Confining WS2 hierarchical structures into carbon core-shells for enhanced sodium storage

Contact Info

Product

Resources

About

A Multifunctional Na_xBi/NaCl Flexible Interface Layer for Solid‐State Na Metal Batteries

A Multifunctional Na_xBi/NaCl Flexible Interface Layer for Solid‐State Na Metal Batteries