MOF lamellar membrane-derived LLTO solid state electrolyte for high lithium ion conduction

Dong, Wenying; Zhang, Yafang; Zhu, Jiachen; Lv, Ruixin; Li, Zhenghua; Wu, Wenjia; Li, Wenpeng; Wang, Jingtao

doi:10.1016/j.memsci.2022.121041

Cited by 8 publications

(12 citation statements)

References 43 publications

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“…The transport channel for lithium ions becomes wider and the drag force is decreased. In addition, combined with the rigid framework of vermiculite nanosheet, the intrinsic resistance is dramatically reduced [ 7 , 17 ]. Therefore, the ionic conductivity of IEVMT films in the horizontal direction shows a great improvement.…”

Section: Resultsmentioning

confidence: 99%

“…Such a bright future of the ASSLB benefits from the dramatically improved safety and energy density after the liquid electrolyte system is replaced by the solid-state electrolyte [ 4 , 5 , 6 ]. Therefore, the solid-state electrolyte is of vital importance for the ASSLB and directly affects its performance [ 7 ]. Polymer electrolytes and ceramic electrolytes are the main kinds of solid-state electrolytes that have been extensively studied.…”

Section: Introductionmentioning

confidence: 99%

“…Two-dimensional (2D) materials have the potential to serve as ceramic electrolytes due to their low density, thin thickness, and easy processing [ 25 , 26 , 27 ]. Dong et al used a lamellar MOF membrane to grow a LLTO electrolyte and obtained a 11 μm composite thin film which achieved a high ionic conductivity of 1.19 × 10 −4 S·cm −1 [ 7 ]. However, making large-scale 2D films or composite membranes still faces the challenges of complex preparation technology, low yield, high cost, and ragged quality [ 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

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Facile Synthesis of Two-Dimensional Natural Vermiculite Films for High-Performance Solid-State Electrolytes

et al. 2023

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Ceramic electrolytes hold application prospects in all-solid-state lithium batteries (ASSLB). However, the ionic conductivity of ceramic electrolytes is limited by their large thickness and intrinsic resistance. To cope with this challenge, a two-dimensional (2D) vermiculite film has been successfully prepared by self-assembling expanded vermiculite nanosheets. The raw vermiculite mineral is first exfoliated to thin sheets of several atomic layers with about 1.2 nm interlayer channels by a thermal expansion and ionic exchanging treatment. Then, through vacuum filtration, the ion-exchanged expanded vermiculite (IEVMT) sheets can be assembled into thin films with a controllable thickness. Benefiting from the thin thickness and naturally lamellar framework, the as-prepared IEVMT thin film exhibits excellent ionic conductivity of 0.310 S·cm−1 at 600 °C with low excitation energy. In addition, the IEVMT thin film demonstrates good mechanical and thermal stability with a low coefficient of friction of 0.51 and a low thermal conductivity of 3.9 × 10−3 W·m−1·K−1. This reveals that reducing the thickness and utilizing the framework is effective in increasing the ionic conductivity and provides a promising stable and low-cost candidate for high-performance solid electrolytes.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Facile Synthesis of Two-Dimensional Natural Vermiculite Films for High-Performance Solid-State Electrolytes

et al. 2023

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“…Depending on composition, SSEs can be categorized into three primary systems: inorganic, polymeric, and composite SSEs. − Inorganic SSEs have undergone extensive research owing to their intrinsic nonflammability and high shear modulus, which mainly include sulfide-type (LPSX, X = Cl, Br, I), garnet-type (LLZO), , sodium superionic conductor (NASICON)-type (LAGP), − perovskite-type (LLTO), , and lithium phosphorus oxynitride (LiPON). , Among all of the various SSEs, the garnet-type SSE Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) is particularly notable due to its impressive ionic conductivity of approximately 1 mS cm –1 at room temperature, remarkable stability with a lithium metal anode, and wide electrochemical window. − However, garnet-type SSEs present a couple of challenges demanding resolution. First, garnet-type SSEs have a susceptibility to reacting with H 2 O and CO 2 , which results in the formation of Li 2 CO 3 and diminishes the wettability of garnet-type SSEs and the Li anode interface .…”

Section: Introductionmentioning

confidence: 99%

Economic and Effective Construction of a P/Sn Multifunctional Layer on the Li/Garnet Interface via Transformation Reactions

Zhao,

Lin,

Yang

et al. 2024

ACS Sustainable Chem. Eng.

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Garnet-based solid-state electrolytes (SSEs) have been regarded as one of the most promising ideal candidates for applications in all-solid-state lithium metal batteries (ASSLMBs) due to their high electrochemical stability, wide potential window, and superior safety performance. However, their practical utilization is currently limited by their poor interfacial compatibility and short cycling life. Here, a low-cost and effective interfacial modification method is proposed to improve the interfacial contact by introducing a thin uniform modified layer of Sn 4 P 3 on the surface of garnet-type Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 SSE. According to experimental results and theoretical calculations, it has been discovered that Li and Sn 4 P 3 undergo a transformation reaction, resulting in the production of a multifunctional interfacial layer consisting of Li 22 Sn 5 /Li 8 SnP 4 . Specifically, due to the presence of this layer, the interfacial impedance of the Li−Li symmetric cell is just approximately 1 Ω cm −2 and the symmetric cell exhibits a critical current density of 1.7 mA cm −2 at room temperature. The remarkable features of the electrolyte interface ensure that the symmetric cells are capable of stable electrochemical cycling for >1800 h at 0.5 mA cm −2 . Additionally, the ASSLMBs demonstrate favorable cycling and rate performance. This effective transformation reaction-driven interfacial modification strategy offers a beneficial means of resolving the interfacial issues of Li/garnet-state SSEs.

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“…Metal–organic framework (MOF) materials, known for their expansive specific surface area and customizable three-dimensional (3D) pore channel structure, represent an ideal choice for crafting electrolytes with the ability to facilitate ion flux-induced uniform lithium plating/exfoliation. − They also contribute to the stability of polymer electrolytes. , Among the commonly encountered MOFs, such as MIL-101, ZiF-8, and UiO-66, UiO-66 stands out as a result of its ideal octahedral coordination geometry. This unique structure creates an electron-deficient environment around the zirconium atom, facilitating interactions with Lewis bases by accepting electron pairs from lithium salts.…”

Section: Introductionmentioning

confidence: 99%

Poly(vinylidene fluoride-co-hexafluoropropylene)-Based Solid Polymer Electrolyte Incorporated with UiO-66 for Lithium Metal Batteries

Liu,

Xu,

Liu

et al. 2023

Energy Fuels

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All-solid-state lithium metal batteries (ASSLMBs) have garnered significant interest as a result of their enhanced safety features and higher energy density compared to traditional lithium-ion batteries with liquid electrolytes. Nonetheless, a substantial challenge within ASSLMBs lies in the constrained lithium-ion flux encountered in solid-state polymer electrolytes, resulting in subpar performance during high-current charging and discharging scenarios. This limitation detrimentally affects the electrochemical performance of ASSLMBs. In this present work, we introduce a novel composite solid polymer electrolyte (CSPE) comprising metal–organic frameworks, namely, UiO-66, poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP), and lithium bis(trifluoromethane)-sulfonimide (LiTFSI) (referred to as UPH-SPE). UPH-SPE containing 5 wt % UiO-66 demonstrates exceptional characteristics, including a high ionic conductivity of 4.7 × 10–4 S cm–1, an electrochemical stability window of 4.9 V, and a remarkable lithium-ion transference number of 0.58 at 25 °C. Full cell tests unequivocally showcase that these newly developed composite electrolytes exhibit significantly improved performance in terms of the rate capability and cycling stability at room temperature. Specifically, the discharge capacity of ASSLMBs with UPH-SPE remains at 140 mAh g–1 when operated at a current density of 0.5 C over 100 cycles. Even after 200 cycles, the capacity is sustained at 94 mAh g–1. This study underscores the potential of our CSPE film to advance the practical application of ASSLMBs, offering promising prospects for future developments in this field.

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MOF lamellar membrane-derived LLTO solid state electrolyte for high lithium ion conduction

Cited by 8 publications

References 43 publications

Facile Synthesis of Two-Dimensional Natural Vermiculite Films for High-Performance Solid-State Electrolytes

Facile Synthesis of Two-Dimensional Natural Vermiculite Films for High-Performance Solid-State Electrolytes

Economic and Effective Construction of a P/Sn Multifunctional Layer on the Li/Garnet Interface via Transformation Reactions

Poly(vinylidene fluoride-co-hexafluoropropylene)-Based Solid Polymer Electrolyte Incorporated with UiO-66 for Lithium Metal Batteries

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