Growth of self-textured Ga3+-substituted Li7La3Zr2O12 ceramics by solid state reaction and their significant enhancement in ionic conductivity

Qin, Shiying; Zhu, Xiaohong; Jiang, Yue; Ling, Ming’en; Hu, Zhiwei; Zhu, Jiliang

doi:10.1063/1.5019179

Cited by 85 publications

(50 citation statements)

References 56 publications

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“…These samples yield, in the ideal case, room‐temperature (total) conductivities reaching values of 1 mS cm −1 or conductivities (slightly) above this value; [ 23 ] as an example Qin et al reached 2 mS cm −1 if Ga‐LLZO is present in a self‐textured form. [ 24 ] Here, we studied Czochralski‐grown Ga‐stabilized LLZO single crystals with total room‐temperature conductivities in this order of magnitude, 1 mS cm −1 (293 K).…”

Section: Resultsmentioning

confidence: 99%

The Electronic Conductivity of Single Crystalline Ga‐Stabilized Cubic Li₇La₃Zr₂O₁₂: A Technologically Relevant Parameter for All‐Solid‐State Batteries

Philipp

Gadermaier

Posch

et al. 2020

Adv Materials Inter

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The next‐generation of all‐solid‐state lithium batteries need ceramic electrolytes with very high ionic conductivities. At the same time a negligible electronic conductivity σeon is required to eliminate self‐discharge in such systems. A non‐negligible electronic conductivity may also promote the unintentional formation of Li dendrites, being currently one of the key issues hindering the development of long‐lasting all‐solid‐state batteries. This interplay is suggested recently for garnet‐type Li7La3Zr2O12 (LLZO). It is, however, well known that the overall macroscopic electronic conductivity may be governed by a range of extrinsic factors such as impurities, chemical inhomogeneities, grain boundaries, morphology, and size effects. Here, advantage of Czochralski‐grown single crystals, which offer the unique opportunity to evaluate intrinsic properties of a chemically homogeneous matrix, is taken to measure the electronic conductivity σeon. Via long‐time, high‐precision potentiostatic polarization experiments an upper limit of σeon in the order of 5 × 10−10 S cm−1 (293 K) is estimated. This value is by six orders of magnitude lower than the corresponding total conductivity σtotal = 10−3 S cm−1 of Ga‐LLZO. Thus, it is concluded that the high values of σeon recently reported for similar systems do not necessarily mirror intragrain bulk properties of chemically homogenous systems but may originate from chemically inhomogeneous interfacial areas.

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Section: Resultsmentioning

confidence: 99%

The Electronic Conductivity of Single Crystalline Ga‐Stabilized Cubic Li₇La₃Zr₂O₁₂: A Technologically Relevant Parameter for All‐Solid‐State Batteries

Philipp

Gadermaier

Posch

et al. 2020

Adv Materials Inter

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“…[13][14][15][16][17][18] Bulk ionic conductivities at room temperature (s RT ) of $1 mS/cm to greater than 10 mS/cm have been achieved in both categories. 13,17,19 Nevertheless, the power density, rate capacity, and capacity retention of SSBs employing these superionic conductors remain poor, impeding their ultimate commercial usage. 20,21 These poor properties reflect the high resistance at the electrode/ SSE interfaces, which grows upon cycling.…”

Section: Introductionmentioning

confidence: 99%

Computational Screening of Cathode Coatings for Solid-State Batteries

Xiao

Miara

Wang

et al. 2019

Joule

344

397

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Solid-state batteries are considered the next generation of batteries, but they still suffer from high interfacial resistance. One strategy to mitigate the problem is to use coating. We performed a computational screening to find promising cathode coating compositions. Polyanionic oxides are highlighted for good overall characteristics, and LiH 2 PO 4 , LiTi 2 (PO 4 ) 3 , and LiPO 3 are particularly appealing candidates. Furthermore, factors including oxygen bond covalency and Li content are identified to affect oxidation stability of polyanionic oxide coatings.

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“…The highest conductivity of close to 1-2 mS cm −1 was observed for both Ta-and Ga-stabilized LLZO:Li 6.75 La 3 Zr 1.75 Ta 0.25 O 12 , [143] Li 6.55 Ga 0.15 La 3 Zr 25 O 12 . [144] The detailed structure and transport mechanism have been presented in several recent reviews. [145][146][147][148]…”

Section: Ia D)mentioning

confidence: 99%

Solid‐State Li–Metal Batteries: Challenges and Horizons of Oxide and Sulfide Solid Electrolytes and Their Interfaces

Kim

Balaish

Wadaguchi

et al. 2020

Advanced Energy Materials

446

355

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lightweight, and compact and allow for versatile device geometries. They must also be scalable and offer high energy density to provide improved packing efficiency and longer device operation. Although both Ni-MH batteries and LIBs have been commercialized since the 1990s, [1] LIBs possess twice the gravimetric/volumetric energy density (250 Wh kg −1 /700 Wh L −1 vs 170 Wh kg −1 /350 Wh L −1 ), [2] higher battery voltage (3.7 V vs 1.2 V), and longer cycle life with lower self-discharge, [3] contributing tremendously to the proliferation of portable electronic devices (e.g., mobile phones, laptops, cameras, tablets) as well as emerging new technologies such as wearable electronic devices (e.g., smart watches and sport-related tracking devices). Their high gravimetric/ volumetric energy density, [2] excellent cycle life (thousands of cycles), and lack of the memory effect have positioned LIBs as state-of-the-art power sources and one of the greatest successes of modern electrochemistry, revolutionizing the way we acquire, process, transmit, and share information globally. Nevertheless, advances in battery energy density, safety, costs, and flexibility in shape and size are still needed to keep up with the rapidly growing demand for devices with even longer runtime as well as real-time data collection and transmission capabilities in addition to increasingly energy-demanding applications such as electric vehicles (EVs) and electricity grid storage. Even though LIBs were first commercialized in all electric vehicles (EVs) in 2010 and also emerged for grid application in the same time frame, the low energy density (≈250 Wh kg −1 ) and high average cost (≈$156 kWh −1 in 2019) of conventional LIBs do not meet the requirements for advanced EVs and grid-scale energy storage. [4][5][6] Specifically, the driving range per charge (miles), which is related to the energy density of each cell, and the cost are important parameters for EVs. For example, one 85 kWh battery pack in a Tesla Model S requires 7104 LIB cells, with an energy density of 265 Wh kg −1 , providing an average range of 250 miles, which is ahead of the range of other EVs but still behind the target of 375 miles. [4] In grid-scale applications, LIBs can be used for various tasks: frequency regulation, peak shaving, load leveling, and large-scale integration of renewable energies, with specific properties generally required for each task. For frequency regulation, LIBs need to provide a fast response, high rate performance, and high-power capability,The introduction of new, safe, and reliable solid-electrolyte chemistries and technologies can potentially overcome the challenges facing their liquid counterparts while widening the breadth of possible applications. Through tech-historic evolution and rationally analyzing the transition from liquidbased Li-ion batteries (LIBs) to all-solid-state Li-metal batteries (ASSLBs), a roadmap for the development of a successful oxide and sulfide-based ASSLB focusing on interfacial challenges is introduced, while accounting ...

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Growth of self-textured Ga3+-substituted Li7La3Zr2O12 ceramics by solid state reaction and their significant enhancement in ionic conductivity

Cited by 85 publications

References 56 publications

The Electronic Conductivity of Single Crystalline Ga‐Stabilized Cubic Li₇La₃Zr₂O₁₂: A Technologically Relevant Parameter for All‐Solid‐State Batteries

The Electronic Conductivity of Single Crystalline Ga‐Stabilized Cubic Li₇La₃Zr₂O₁₂: A Technologically Relevant Parameter for All‐Solid‐State Batteries

Computational Screening of Cathode Coatings for Solid-State Batteries

Solid‐State Li–Metal Batteries: Challenges and Horizons of Oxide and Sulfide Solid Electrolytes and Their Interfaces

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Growth of self-textured Ga3+-substituted Li7La3Zr2O12 ceramics by solid state reaction and their significant enhancement in ionic conductivity

Cited by 85 publications

References 56 publications

The Electronic Conductivity of Single Crystalline Ga‐Stabilized Cubic Li7La3Zr2O12: A Technologically Relevant Parameter for All‐Solid‐State Batteries

The Electronic Conductivity of Single Crystalline Ga‐Stabilized Cubic Li7La3Zr2O12: A Technologically Relevant Parameter for All‐Solid‐State Batteries

Computational Screening of Cathode Coatings for Solid-State Batteries

Solid‐State Li–Metal Batteries: Challenges and Horizons of Oxide and Sulfide Solid Electrolytes and Their Interfaces

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The Electronic Conductivity of Single Crystalline Ga‐Stabilized Cubic Li₇La₃Zr₂O₁₂: A Technologically Relevant Parameter for All‐Solid‐State Batteries

The Electronic Conductivity of Single Crystalline Ga‐Stabilized Cubic Li₇La₃Zr₂O₁₂: A Technologically Relevant Parameter for All‐Solid‐State Batteries