Study on the suppression of lithium dendrites based on solid electrolyte Li7La3Zr2O12 with annealing treatment of Al interlayer

Zhang, Yanhua; Gao, Xinglong; Tang, Zijun; Mei, Yuhang; Xiang, Xing; Deng, Jia

doi:10.1016/j.jallcom.2022.163908

Cited by 16 publications

(8 citation statements)

References 26 publications

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“…Regarding the stretching mode of the Zr–O band, it is observed at the high-energy band around 640 cm –1 . In the case of TSS 1200 and CS 1200, both samples coincide with the previous Raman results of cubic phase LLZO . Thus, it can be inferred that both samples form a thermodynamically stable cubic phase.…”

Section: Resultssupporting

confidence: 88%

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Controlling Dendrite Formation for Long-Term Cyclability and Fast Li⁺ Diffusion Kinetics in Solid-State Electrolyte Li₇La₃Zr₂O₁₂

et al. 2023

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Ga-doped Li7La3Zr2O12 (Ga-LLZO) solid-state electrolyte is a promising material for advanced batteries due to its superior ionic conductivity and mechanical properties. However, Ga-LLZO is challenged by high grain boundary (GB) resistance and dendrite propagation. Therefore, in this study, we suggest the two-step sintering (TSS) method for controlling the microstructure, resulting in lower GB resistance and achieving superior dendrite resistance. To elucidate the cycling performance, a critical current density (CCD) test was performed on a Ga-LLZO sample fabricated with TSS. As a result, the Ga-LLZO sample fabricated with TSS demonstrates a superior CCD value of 0.32 mA cm–2 as well as shows stable cycling at a current density of 0.2 mA cm–2. According to the impedance analysis, the sample fabricated with TSS demonstrates a significant increase in ionic conductivity compared to the sample fabricated with the conventional sintering (CS) method. This phenomenon implies that the enhanced sintering technique of TSS can reduce the GB resistance and dendrite formation by achieving the densification and tight GB. Extensive investigation into the dendrite formation mechanism has provided compelling evidence that dendrites are not solely composed of pure Li but rather consist of a compound containing both C and O elements. This finding significantly contributes to the understanding of the composition and nature of dendrites in Ga-LLZO, shedding light on their role in the acceleration of the phase decomposition process.

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Section: Resultssupporting

confidence: 88%

“…In the case of TSS 1200 and CS 1200, both samples coincide with the previous Raman results of cubic phase LLZO. 15 Thus, it can be inferred that both samples form a thermodynamically stable cubic phase. Figure 1b shows the XRD patterns of cubic Ga-LLZO.…”

Section: Resultsmentioning

confidence: 99%

Controlling Dendrite Formation for Long-Term Cyclability and Fast Li⁺ Diffusion Kinetics in Solid-State Electrolyte Li₇La₃Zr₂O₁₂

et al. 2023

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“…The Al 2 O 3 interlayer reacts with Li + , resulting in the formation of a Li-Al-O compound that exhibits favorable Li + conductivity. This phenomenon further improves the overall performance of the solid-state batteries by facilitating the efficient transport of Li + ions within the system [35]. The reported ion conductivity in Al-LLZO ceramics has been improved through the complex substitution of Al 3+ -Li + and the segregation of Li x AlO y [36].…”

Section: Introductionmentioning

confidence: 95%

Optimizing Li Ion Transport in a Garnet-Type Solid Electrolyte via a Grain Boundary Design

Sun,

Cheng,

Cao

et al. 2023

Batteries

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Garnet-type solid electrolytes have gained considerable attention owing to their exceptional ionic conductivity and broad electrochemical stability window, making them highly promising for solid-state batteries (SSBs). However, this polycrystalline ceramic electrolyte contains an abundance of grain boundaries (GBs). During the repetitive electroplating and stripping of Li ions, uncontrolled growth and spreading of lithium dendrites often occur at GBs, posing safety concerns and resulting in a shortened cycle life. Reducing the formation and growth of lithium dendrites can be achieved by rational grain boundary design. Herein, the garnet-type solid electrolyte LLZTO was firstly coated with Al2O3 using the atomic layer deposition (ALD) technique. Subsequently, an annealing treatment was employed to introduce Al2O3 into grain boundaries, effectively modifying them. Compared with the Li/LLZTO/Li cells, the Li/LLZTO@Al2O3-annealed/Li symmetric batteries exhibit a more stable cycling performance with an extended period of 200 h at 1 mA cm−2. After matching with the NMC811 cathode, the capacity retention rate of batteries can reach 96.8% after 50 cycles. The infusion of Al2O3 demonstrates its capability to react with LLZTO particles, creating an ion-conducting interfacial layer of Li-Al-O at the GBs. This interfacial layer effectively inhibits Li nucleation and filament growth within LLZTO, contributing to the suppression of lithium dendrites. Our work provides new suggestions for optimizing the synthesis of solid-state electrolytes, which can help facilitate the commercial application of solid-state batteries.

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“…6,7 This has led to a surge in research on the formation of the highly stable low-resistivity Li/Li 7 La 3 Zr 2 O 12 (LLZ) interface for developing LLZ-based ASSBs. [8][9][10][11] However, the formation of a cathode/LLZ interface with attributes that can facilitate battery operation, such as low interfacial resistance and good contact, is a major challenge in realising LLZ-based ASSBs. Therefore, strategies such as sintering at temperatures above 1000 °C have been adopted for the densication of LLZ to enhance its ionic conductivity and stability against Li metal.…”

Section: Introductionmentioning

confidence: 99%

“…6,7 This has led to a surge in research on the formation of the highly stable low-resistivity Li/Li 7 La 3 Zr 2 O 12 (LLZ) interface for developing LLZ-based ASSBs. 8–11…”

Section: Introductionmentioning

confidence: 99%

Co-sintering a cathode material and garnet electrolyte to develop a bulk-type solid-state Li metal battery with wide electrochemical windows

Hayashi,

Watanabe,

Shimanoe

2024

J. Mater. Chem. A

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Study on the suppression of lithium dendrites based on solid electrolyte Li7La3Zr2O12 with annealing treatment of Al interlayer

Cited by 16 publications

References 26 publications

Controlling Dendrite Formation for Long-Term Cyclability and Fast Li⁺ Diffusion Kinetics in Solid-State Electrolyte Li₇La₃Zr₂O₁₂

Controlling Dendrite Formation for Long-Term Cyclability and Fast Li⁺ Diffusion Kinetics in Solid-State Electrolyte Li₇La₃Zr₂O₁₂

Optimizing Li Ion Transport in a Garnet-Type Solid Electrolyte via a Grain Boundary Design

Co-sintering a cathode material and garnet electrolyte to develop a bulk-type solid-state Li metal battery with wide electrochemical windows

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Study on the suppression of lithium dendrites based on solid electrolyte Li7La3Zr2O12 with annealing treatment of Al interlayer

Cited by 16 publications

References 26 publications

Controlling Dendrite Formation for Long-Term Cyclability and Fast Li+ Diffusion Kinetics in Solid-State Electrolyte Li7La3Zr2O12

Controlling Dendrite Formation for Long-Term Cyclability and Fast Li+ Diffusion Kinetics in Solid-State Electrolyte Li7La3Zr2O12

Optimizing Li Ion Transport in a Garnet-Type Solid Electrolyte via a Grain Boundary Design

Co-sintering a cathode material and garnet electrolyte to develop a bulk-type solid-state Li metal battery with wide electrochemical windows

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Product

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Controlling Dendrite Formation for Long-Term Cyclability and Fast Li⁺ Diffusion Kinetics in Solid-State Electrolyte Li₇La₃Zr₂O₁₂

Controlling Dendrite Formation for Long-Term Cyclability and Fast Li⁺ Diffusion Kinetics in Solid-State Electrolyte Li₇La₃Zr₂O₁₂