Nebulized spray pyrolysis of Al-doped Li7La3Zr2O12 solid electrolyte for battery applications

Djenadic, Ruzica; Botros, Miriam; Benel, Cahit; Clemens, Oliver; Indris, Sylvio; Choudhary, Ankit; Bergfeldt, Thomas; Hahn, Horst

doi:10.1016/j.ssi.2014.05.007

Cited by 77 publications

(75 citation statements)

References 42 publications

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“…In addition to the bulk interception at the highest frequency, the other 2 semicircles are most probably contributions from different types of grain boundaries ( Figure 7D). A similar observation was reported for Aldoped Li 7 La 3 Zr 2 O 12 by Djenadic et al, 27 and they suggested that the presence of different phases could be the reason. To explore the possibility, we collected the highresolution synchrotron XRD pattern of the Fe-doped LZO sample as shown in Figure S11.…”

Section: Transport Properties and Defect Processsupporting

confidence: 86%

Nonstoichiometry and Li‐ion transport in lithium zirconate: The role of oxygen vacancies

2018

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Understanding Li‐ion migration mechanisms and enhancing Li‐ion transport in Li2ZrO3 (LZO) is important to its role as solid absorbent for reversible CO2 capture at elevated temperatures, as ceramic breeder in nuclear reactors, and as electrode coating in high‐voltage lithium‐ion batteries (LIBs). Although defect engineering is an effective way to tune the properties of ceramics, the defect structure of LZO is largely unknown. This study reports the defect structure and electrical properties of undoped LZO and a series of cation‐doped LZOs: (i) depending on their charge states, cation dopants can control the oxygen vacancy concentration in doped LZOs; (ii) the doped LZOs with higher oxygen vacancy concentrations exhibit better Li+ conductivity, and consequently faster high‐temperature CO2 absorption. In fact, the Fe (II)‐doped LZO shows the highest Li‐ion conductivity reported for LZOs, reaching 3.3 mS/cm at ~300°C that is more than 1 order of magnitude higher than that of the undoped LZO.

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Section: Transport Properties and Defect Processsupporting

confidence: 86%

Nonstoichiometry and Li‐ion transport in lithium zirconate: The role of oxygen vacancies

2018

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“…In our simulations of Al Li -doped LLZ we observe a minor increase of lattice parameters and thermal expansion as well as a reduced thermal stability. In contrast to the simulated lattice parameter effect our experimental room temperature lattice parameters of Al-doped LLZ obtained from Rietveld refinements (a = 12.9720(2) Å) closely agree with the literature data [12,26] in predicting a slight reduction of the lattice constant by the doping that may be simply understood as an effect of the reduced Li + content. The discrepancy between our results from MD simulation and Rietveld refinement of XRD data may thus point towards a minor imperfection of this transferable force-field when applied to describe Al-O interactions.…”

Section: Structuresupporting

confidence: 85%

Effects of penta- and trivalent dopants on structure and conductivity of Li7La3Zr2O12

Ezbiri

Rao

et al. 2015

Solid State Ionics

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“…Inductively coupled plasma optical emission spectroscopy (ICP-OES) indicated that the overall chemical compositions of the two samples were similar: the chemical compositions are Li 5 Tables S2 and S3, Supporting Information. 17,35 By exploiting the uniquely different densified microstructures of LLZO_LG and LLZO_SG samples, it was possible to fabricate LLZO solid electrolytes with complex heterostructures. This was carried out by pressing and cosintering three alternating layers of green bodies composed of either the 90/10 bimodal distribution of 1 and 10 μm particles, or entirely consisting of 1 μm particles.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Effect of Surface Microstructure on Electrochemical Performance of Garnet Solid Electrolytes

Cheng

Chen

Kunz

et al. 2015

ACS Appl. Mater. Interfaces

361

383

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Cubic garnet phases based on Al-substituted Li7La3Zr2O12 (LLZO) have high ionic conductivities and exhibit good stability versus metallic lithium, making them of particular interest for use in next-generation rechargeable battery systems. However, high interfacial impedances have precluded their successful utilization in such devices until the present. Careful engineering of the surface microstructure, especially the grain boundaries, is critical to achieving low interfacial resistances and enabling long-term stable cycling with lithium metal. This study presents the fabrication of LLZO heterostructured solid electrolytes, which allowed direct correlation of surface microstructure with the electrochemical characteristics of the interface. Grain orientations and grain boundary distributions of samples with differing microstructures were mapped using high-resolution synchrotron polychromatic X-ray Laue microdiffraction. The electrochemical characteristics are strongly dependent upon surface microstructure, with small grained samples exhibiting much lower interfacial resistances and better cycling behavior than those with larger grain sizes. Low area specific resistances of 37 Ω cm(2) were achieved; low enough to ensure stable cycling with minimal polarization losses, thus removing a significant obstacle toward practical implementation of solid electrolytes in high energy density batteries.

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Nebulized spray pyrolysis of Al-doped Li7La3Zr2O12 solid electrolyte for battery applications

Cited by 77 publications

References 42 publications

Nonstoichiometry and Li‐ion transport in lithium zirconate: The role of oxygen vacancies

Nonstoichiometry and Li‐ion transport in lithium zirconate: The role of oxygen vacancies

Effects of penta- and trivalent dopants on structure and conductivity of Li7La3Zr2O12

Effect of Surface Microstructure on Electrochemical Performance of Garnet Solid Electrolytes

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