The Systems Li-Tl, Na-Tl and K-Tl

Sangster, James

doi:10.1007/s11669-017-0609-9

Cited by 2 publications

(1 citation statement)

References 43 publications

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“…Its position at the frontier between metallic and salt-like materials makes thallium a very interesting metal concerning its structural chemistry in formal negative oxidation states [16][17][18]. Binaries of thallium and lithium, sodium, or potassium were recently summarized in terms of the respective phase diagrams [19]. Thümmel and Klemm reported investigations on the formed binaries of the heavier congeners, rubidium and cesium, in 1970 [20].…”

Section: Introductionmentioning

confidence: 99%

Spotlight on Alkali Metals: The Structural Chemistry of Alkali Metal Thallides

Gärtner

2020

Crystals

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Alkali metal thallides go back to the investigative works of Eduard Zintl about base metals in negative oxidation states. In 1932, he described the crystal structure of NaTl as the first representative for this class of compounds. Since then, a bunch of versatile crystal structures has been reported for thallium as electronegative element in intermetallic solid state compounds. For combinations of thallium with alkali metals as electropositive counterparts, a broad range of different unique structure types has been observed. Interestingly, various thallium substructures at the same or very similar valence electron concentration (VEC) are obtained. This in return emphasizes that the role of the alkali metals on structure formation goes far beyond ancillary filling atoms, which are present only due to charge balancing reasons. In this review, the alkali metals are in focus and the local surroundings of the latter are discussed in terms of their crystallographic sites in the corresponding crystal structures.

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Section: Introductionmentioning

confidence: 99%

Spotlight on Alkali Metals: The Structural Chemistry of Alkali Metal Thallides

Gärtner

2020

Crystals

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The Microscopic Mechanism of Lithiation and Delithiation in the Ag/C Buffer Layer for Anode‐Free Solid‐State Batteries

Xie,

Diallo,

Kim

et al. 2024

Advanced Energy Materials

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Lithium metal solid‐state batteries (LMSSBs) have demonstrated their high energy density and cycling performance at high current densities in an anode‐free architecture, featuring a thin Ag/C composite buffer layer (BL) between the current collector (CC) and the solid electrolyte (SE). This study explains the microscopic mechanism of the Ag/C BL by using first‐principles atomistic and continuum modeling. It is shown that Ag effectively acts as a homogeneous solid‐solution beyond AgLi2.32 and maintains a positive potential even at AgLi25 during lithiation. Key factors underlying the working of the Ag/C BL include lower interfacial resistance at the BL/CC interface than at the BL/SE interface, leading to predominant Li deposition on BL/CC, and substantial Ag–Li volume expansion during lithiation. This, combined with stronger BL/SE adhesion, causes BL/SE separation and Ag–Li extrusion toward the CC side. During delithiation, Ag re‐precipitates as nanoparticles uniformly on the CC, with its positive lithiation potential homogenizing Li currents in subsequent cycles. Other metals are less effective due to their relatively large overpotential, premature lithiation termination, and limited volume expansions hindering movement toward the CC. The study aids the BL design, focusing on metal choice and optimization material and microstructural properties, such as the Li‐ion conductivity and interfacial resistance.

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The Systems Li-Tl, Na-Tl and K-Tl

Cited by 2 publications

References 43 publications

Spotlight on Alkali Metals: The Structural Chemistry of Alkali Metal Thallides

Spotlight on Alkali Metals: The Structural Chemistry of Alkali Metal Thallides

The Microscopic Mechanism of Lithiation and Delithiation in the Ag/C Buffer Layer for Anode‐Free Solid‐State Batteries

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