Interfaces in Garnet‐Based All‐Solid‐State Lithium Batteries

Wang, Dawei; Zhu, Changbao; Fu, Yanpeng; Sun, Xueliang; Yang, Yong

doi:10.1002/aenm.202001318

Cited by 97 publications

(73 citation statements)

References 144 publications

(303 reference statements)

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“…[15][16][17][18] It is generally acknowledged that the dynamic morphological evolution at the Li/SSE interface can remarkably influence the electrochemical performance of ASSBs. [17,[19][20][21][22][23] In specific, during striping, Li atoms at the Li/SSE interface dissolve into SSE, and meanwhile, the diffusion of Li atoms in Li metal replenishes the Li loss from the interface. Since the rate of Li striping usually exceeds the diffusion limit of Li atoms, the Kirkendall voids will initiate and grow at the interface, leading to the loss of interfacial contact and increased cell impedance.…”

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confidence: 99%

A Morphologically Stable Li/Electrolyte Interface for All‐Solid‐State Batteries Enabled by 3D‐Micropatterned Garnet

Liu

et al. 2021

Advanced Materials

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batteries (ASSBs) using the inorganic SSE and Li-metal anode still experience issues with dendrite penetration and associated early short-circuit during battery operation. [11][12][13][14] So far, considerable efforts have been devoted to elucidating the underlying mechanisms of this early failure of ASSBs. [15][16][17][18] It is generally acknowledged that the dynamic morphological evolution at the Li/SSE interface can remarkably influence the electrochemical performance of ASSBs. [17,[19][20][21][22][23] In specific, during striping, Li atoms at the Li/SSE interface dissolve into SSE, and meanwhile, the diffusion of Li atoms in Li metal replenishes the Li loss from the interface. Since the rate of Li striping usually exceeds the diffusion limit of Li atoms, the Kirkendall voids will initiate and grow at the interface, leading to the loss of interfacial contact and increased cell impedance. [20,24,25] The morphological degradation becomes even worse during the subsequent plating. Li prefers to deposit at the regions still contacted with SSE instead of the detached areas, which develops a nonuniform deposition at the interface that further promotes the nucleation and growth of Li dendrites as well as the short-circuit of ASSBs. [22,26] An effective strategy to inhibit morphological degradation at the Li/SSE interface is applying an external stack pressure on ASSBs. [20][21][22] With the pressure, Li metal near the interface can mechanically deform through creep, offering another route to replenish the Li loss and thus prevent the void formation. [21,27] Nevertheless, the practical adoption of this strategy is limited by a strict constraint from the "critical stack pressure." [20] In specific, the applied pressure has to be higher than the "critical stack pressure" to effectively suppress the morphological degradation at the interface. Otherwise, the mechanical deformation will be slower than the electrochemical deformation caused by Li stripping, leading to an insufficient Li replenishment to the interface. In this case, the voids will still form at the interface, followed by the nucleation and growth of Li dendrites (Figure 1a). It should be noticed that the "critical stack pressure" can reach several MPa for the ASSBs cycled under relatively low current density (e.g., 7.5 MPa for the Li/garnet/ Li cell cycled under 0.2 mA cm -2 ). [20,21,28] This high stack pressure is out of range of the current LIB operation platform (0.1-1.0 MPa) [29] and also sets constraints on the robustness of SSE and thus the broad adoption of viable SSE. [29] Moreover, it is possible that the pressure of this magnitude acts as one Morphological degradation at the Li/solid-state electrolyte (SSE) interface is a prevalent issue causing performance fading of all-solid-state batteries (ASSBs). To maintain the interfacial integrity, most ASSBs are operated under low current density with considerable stack pressure, which significantly limits their widespread usage. Herein, a novel 3D-micropatterned SSE (3D-SSE) that can stabilize the morpho...

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A Morphologically Stable Li/Electrolyte Interface for All‐Solid‐State Batteries Enabled by 3D‐Micropatterned Garnet

Liu

et al. 2021

Advanced Materials

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“…Challenges in ASSLMBs [20] A-B, Interface challenges in cathode/SSE: volume change/strain and interface mismatch. C, Challenges in SSE: Li + migration.…”

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confidence: 99%

Challenges, fabrications and horizons of oxide solid electrolytes for solid‐state lithium batteries

et al. 2021

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Solid electrolyte is a key component for all-solid-state lithium battery that is one of the most promising technologies for next-generation energy storages. This review describes the challenges and strategies, preparation methods and outlook of oxide solid electrolytes for solid-state lithium batteries. The general strategies on enhancing ionic conductivity of oxide solid electrolytes and reducing impedance interface are first summarized. We then introduce the basic structures of typical oxide electrolytes. The preparation technologies are also introduced for oxide electrolytes with various dimensions including bulk, thin film and fiber. In addition, the integration of oxide electrolytes with electrode materials is highlighted. In the last part, an outlook for the future development of oxide electrolytes towards practical applications is provided.

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“…96 Fortunately, at least one group of SSEs seems to attain a perfect compromise between the ionic conductance and anode interface stability-the garnet-structured Li 7 La 3 Zr 2 O 12 (LLZO) and its derivatives. 97 LLZO's ionic conductivity is generally in the neighborhood of 1 mS cm À1 at room temperature and is inert toward Li, even above Li 0 s melting point. Its wide electrochemical window (0-6 V vs. Li + /Li), thermal stability, and fast interfacial charge transfer kinetics are also well documented in the literature.…”

Section: Intermetallic Interphases In Ssbsmentioning

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Intermetallic interphases in lithium metal and lithium ion batteries

Sun

Peng

2021

InfoMat

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A robust electrode-electrolyte interface is the cornerstone for every battery system, as demonstrated in the meandering history of the development of Li-ion batteries (LIBs). In the thrust to replace the graphite anode with more energetic ones in LIBs, the effectual strategy for stabilizing the original graphiteelectrolyte interface becomes obsolete and a new anode-electrolyte interface needs reconfiguration. Unfortunately, this interface has become the Achilles' heel for those anodes, such as Li-metal anode (LMA) and Si-based anode owing to their excessive reductivity, enormous volume change, and so forth. Encouragingly, in the last decade, impressive progress has been made on taming these extremely unstable interfaces and on the solid-state batteries (SSBs) that are reported to be less susceptible to parasitic reactions. One of the distinguished strategies is the application of artificial Li-alloying intermetallic interphases onto the surface of LMA, via the direct introduction of foreign metals to the Li anode or indirect hetero-cations doping in the electrolyte, to regulate the Li deposition/ stripping behavior, which has markedly improved the stability of the LMAelectrolyte interface. In parallel, the intermetallic interphases are also witnessed to profoundly enhance the anode-solid electrolyte contact and the corresponding charge transfer kinetics in various SSBs. This review will provide a panoramic overview of the application of the intermetallic interphases at the anode-electrolyte interfaces in the lithium metal batteries (LMBs), SSBs, and also derivative works in the conventional LIBs, which will focus on different concepts, methodologies, and understandings from the encircled studies.

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Interfaces in Garnet‐Based All‐Solid‐State Lithium Batteries

Cited by 97 publications

References 144 publications

A Morphologically Stable Li/Electrolyte Interface for All‐Solid‐State Batteries Enabled by 3D‐Micropatterned Garnet

A Morphologically Stable Li/Electrolyte Interface for All‐Solid‐State Batteries Enabled by 3D‐Micropatterned Garnet

Challenges, fabrications and horizons of oxide solid electrolytes for solid‐state lithium batteries

Intermetallic interphases in lithium metal and lithium ion batteries

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