Chemical interface engineering of solid garnet batteries for long-life and high-rate performance

Huang, Weilin; Bi, Zhijie; Zhao, Ning; Sun, Qifu; Guo, Xiangxin

doi:10.1016/j.cej.2021.130423

Cited by 29 publications

(12 citation statements)

References 43 publications

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“…The electrochemical impedance spectroscopy (EIS) was carried out to measure the charge transfer resistances at Li/LLZTO interfaces with or without Li 3 PO 4 layer, as shown in Figure 4f. The initial several points of EIS spectra are stemmed from the overall resistance of LLZTO bulk, [66,67] which is almost same for both symmetric cells owing to the employment of same LLZTO electrolytes. The EIS curve for Li/LLZTO/Li cell shows a large semicircle at medium frequency corresponding to the charge transfer resistance at interfaces.…”

Section: Electrochemical Performance Of LI 3 Po 4 -Modified Llzto Pel...mentioning

confidence: 99%

Molten Salt Driven Conversion Reaction Enabling Lithiophilic and Air‐Stable Garnet Surface for Solid‐State Lithium Batteries

Sun

Jia

et al. 2022

Adv Funct Materials

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Section: Electrochemical Performance Of LI 3 Po 4 -Modified Llzto Pel...mentioning

confidence: 99%

Molten Salt Driven Conversion Reaction Enabling Lithiophilic and Air‐Stable Garnet Surface for Solid‐State Lithium Batteries

Sun

Jia

et al. 2022

Adv Funct Materials

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“…In principle, the artificial SEI layer should exhibit excellent chemical stability both with metallic lithium and sulfides to suppress additional parasitic reactions, possess high ionic conductivity and minimal electronic conductivity to avoid formation of MIEC interphase, and appropriate mechanical strength to prevent dendrites growth, as well as high elasticity to sustain volume expansion. 183,[276][277][278] Lithium halides (LiF, LiI, LiBr, etc.) serve as effective components for stable SEI to prevent lithium dendrite growth owing to their high interfacial energy or low electronic conductivity and hence have been used for designing of artificial SEI layer in the sulfide-based system.…”

Section: Artificial Sei Layermentioning

confidence: 99%

“…Another strategy to stabilize the interfaces between sulfides and metallic lithium is constructing a thin artificial SEI layer (in situ). In principle, the artificial SEI layer should exhibit excellent chemical stability both with metallic lithium and sulfides to suppress additional parasitic reactions, possess high ionic conductivity and minimal electronic conductivity to avoid formation of MIEC interphase, and appropriate mechanical strength to prevent dendrites growth, as well as high elasticity to sustain volume expansion 183,276–278 . Lithium halides (LiF, LiI, LiBr, etc.)…”

Section: Interface Engineeringmentioning

confidence: 99%

Challenges, interface engineering, and processing strategies toward practical sulfide‐based all‐solid‐state lithium batteries

Liang

Liu

Wang

et al. 2022

InfoMat

152

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All‐solid‐state lithium batteries have emerged as a priority candidate for the next generation of safe and energy‐dense energy storage devices surpassing state‐of‐art lithium‐ion batteries. Among multitudinous solid‐state batteries based on solid electrolytes (SEs), sulfide SEs have attracted burgeoning scrutiny due to their superior ionic conductivity and outstanding formability. However, from the perspective of their practical applications concerning cell integration and production, it is still extremely challenging to constructing compatible electrolyte/electrode interfaces and developing available scale processing technologies. This review presents a critical overview of the current underlying understanding of interfacial issues and analyzes the main processing challenges faced by sulfide‐based all‐solid‐state batteries from the aspects of cost‐effective and energy‐dense design. Besides, the corresponding approaches involving interface engineering and processing protocols for addressing these issues and challenges are summarized. Fundamental and engineering perspectives on future development avenues toward practical application of high energy, safety, and long‐life sulfide‐based all‐solid‐state batteries are ultimately provided.

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“…Recently, a great effort has been made to decrease the interfacial resistance between LLZO and Li metal anode. , For instance, the LLZO/Li interfacial resistance can be effectively reduced by introducing a thin Au or Al 2 O 3 interlayer. , Good contact between LLZO and Li metal can also be achieved by high pressure and heating because Li metal is ductile, and its melting point is relatively low (180.5 °C) . In contrast, much less effort has been devoted to reducing the interfacial resistance between LLZO and cathode materials . Although good interfacial contact between LLZO and LCO can be achieved by cosintering, LCO decomposes at temperatures greater than 900 °C .…”

Section: Introductionmentioning

confidence: 99%

Degradation Mechanism of All-Solid-State Li-Metal Batteries Studied by Electrochemical Impedance Spectroscopy

Cheng

Kushida

Abe

et al. 2022

ACS Appl. Mater. Interfaces

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Solid-state Li-metal batteries have the potential to achieve both high safety and high energy densities. Among various solid-state fast-ion conductors, the garnet-type Li7La3Zr2O12 (LLZO) is one of the few that are stable to Li metal. However, the large interfacial resistance between LLZO and cathode materials severely limits the practical application of LLZO. Here a LiCoO2 (LCO) film was deposited onto an Al-doped LLZO substrate at room temperature by aerosol deposition, and a low interfacial resistance was achieved. The LCO particles were precoated by Li3BO3 (LBO), which melted to join the LCO particles to the LLZO substrate at heating. All-solid-state Li/LLZO/LBO-LCO cells could deliver an initial discharge capacity of 128 mAh g–1 at 0.2 C and 60 °C and demonstrated relatively high capacity retention of 87% after 30 cycles. The cell degradation mechanism was studied by electrochemical impedance spectroscopy (EIS) and was found to be mainly related to the increase of the interfacial resistance between LBO and LCO. In-situ SEM analysis verified the hypothesis that the increase of the interfacial resistance was caused primarily by interfacial cracking upon cycling. This study demonstrated the capability of EIS as a powerful nondestructive in-situ technique to investigate the failure mechanisms of all-solid-state batteries.

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Chemical interface engineering of solid garnet batteries for long-life and high-rate performance

Cited by 29 publications

References 43 publications

Molten Salt Driven Conversion Reaction Enabling Lithiophilic and Air‐Stable Garnet Surface for Solid‐State Lithium Batteries

Molten Salt Driven Conversion Reaction Enabling Lithiophilic and Air‐Stable Garnet Surface for Solid‐State Lithium Batteries

Challenges, interface engineering, and processing strategies toward practical sulfide‐based all‐solid‐state lithium batteries

Degradation Mechanism of All-Solid-State Li-Metal Batteries Studied by Electrochemical Impedance Spectroscopy

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