Solid Electrolytes in the Spotlight

Doeff, Marca M.; Clément, Raphaële J.; Canepa, Pieremanuele

doi:10.1021/acs.chemmater.1c03770

Cited by 4 publications

(2 citation statements)

References 35 publications

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“…Carbon-neutral alternative energy production and consumption imply a wide range of large-scale energy storage and conversion including low-cost stationary and mobile sodium devices and installations. Amorphous and crystalline sodium ternary or complex sulfides belong to promising advanced materials for solid-state batteries. − Rational design of these compounds requires a deep insight into the atomic structure and relationships between the origin of fast ion transport and chemical or structural features. A seminal discovery of cubic Na 3 PS 4 with room-temperature ionic conductivity σ i = 0.2 mS·cm –1 , obtained by crystallization from the glassy state, has triggered an avalanche of research work in this direction, and numerous sodium sulfides and selenides (Na 3 PSe 4 , Na 10 SnP 2 S 12 , Na 3 SbS 4 , Na 11 Sn 2 PnS 12 , where Pn = Sb, P, etc.)…”

Section: Introductionmentioning

confidence: 99%

Deciphering Fast Ion Transport in Glasses: A Case Study of Sodium and Silver Vitreous Sulfides

et al. 2022

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High-capacity solid-state batteries are promising future products for large-scale energy storage and conversion. Sodium fast ion conductors including glasses and glass ceramics are unparalleled materials for these applications. Rational design and tuning of advanced sodium sulfide electrolytes need a deep insight into the atomic structure and dynamics in relation with ion-transport properties. Using pulsed neutron diffraction and Raman spectroscopy supported by first-principles simulations, we show that preferential diffusion pathways in vitreous sodium and silver sulfides are related to isolated sulfur S iso , that is, the sulfur species surrounded exclusively by mobile cations with a typical stoichiometry of M/S iso ≈ 2. The S iso /S tot fraction appears to be a reliable descriptor of fast ion transport in glassy sulfide systems over a wide range of ionic conductivities and cation diffusivities. The S iso fraction increases with mobile cation content x, tetrahedral coordination of the network former and, in case of thiogermanate systems, with germanium disulfide metastability and partial disproportionation, GeS 2 → GeS + S, leading to the formation of additional sulfur, transforming into S iso . A research strategy enabling to achieve extended and interconnected pathways based on isolated sulfur would lead to glassy electrolytes with superior ionic diffusion.

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Section: Introductionmentioning

confidence: 99%

Deciphering Fast Ion Transport in Glasses: A Case Study of Sodium and Silver Vitreous Sulfides

et al. 2022

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“…As can be anticipated, many of the most engaged with contributions to the journal are in the area of battery materials, being part of the special collection celebrating John Goodenough’s 100th birthday (Table ) ,− and highlighted in the virtual collection Solid Electrolytes in the Spotlight . Both advances in the electrode materials and electrolytes are highlighted, and this topical area includes a review article on solid Li- and Na-ion electrolytes …”

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confidence: 99%