Highly Mobile Ions: Low-Temperature NMR Directly Probes Extremely Fast Li+ Hopping in Argyrodite-Type Li6PS5Br

Epp, Viktor; Gün, Özgül; Deiseroth, H. J.; Wilkening, Martin

doi:10.1021/jz401003a

Cited by 125 publications

(172 citation statements)

References 48 publications

(111 reference statements)

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“…Due to the weaker electric and magnetic interactions of the 6 Li spins the absolute rates R 1 diff are shifted toward lower values. Because of the lower resonance frequency used to acquire the R 1 diff (1/T ) peak in the case of 6 Li the rate maximum shows up at lower T max , as expected [133].…”

Section: Sulfides: LI 6 Ps 5 Br and Li 7 P 3 S 11supporting

confidence: 66%

“…Figure adapted from ref. [133] ature of motional narrowing, the faster Li self-diffusivity. Line narrowing results from averaging of (homonuclear) dipole-dipole interactions due to sufficiently fast hopping processes.…”

Section: Sulfides: LI 6 Ps 5 Br and Li 7 P 3 S 11mentioning

confidence: 99%

“…From a global fit, represented in Fig. 9(b) by the solid line, an activation energy as alow as 0.2 eV is obtained [133]. It represents translational long-range Li ion dynamics; the corresponding value on the low-T side is only 0.08 eV, which is indicative for local(ized) ion dynamics.…”

Section: Sulfides: LI 6 Ps 5 Br and Li 7 P 3 S 11mentioning

confidence: 99%

“…2.5Å. D translates into a Li ion conductivity in the order of 10 −2 S cm −1 which definably makes Li 6 PS 5 Br an ultrafast ionic conductor with a liquid-like diffusion behavior [133].…”

Section: Sulfides: LI 6 Ps 5 Br and Li 7 P 3 S 11mentioning

confidence: 99%

“…For other solid electrolytes, such results are usually seen at 200 K and higher. It is evident that the replacement of S or Se anions with Cl or Br differing in ionic radii causes local strain that may facilitate ionic diffusion [133]. This mismatch in size combined with the different polarizabilities of the halogen ions could serve as an explanation of the enhancement seen when going from Li 7 PS(e) 6 to Li 6 PS 5 Br.…”

Section: Sulfides: LI 6 Ps 5 Br and Li 7 P 3 S 11mentioning

confidence: 99%

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Ion dynamics in solid electrolytes for lithium batteries

et al. 2017

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All-solid-state batteries with ceramic electrolytes and lithium metal anodes represent an attractive alternative to conventional ion battery systems. Conventional batteries still rely on flammable liquids as electronic insulators. Despite the great efforts reported over the last years, the optimum solid electrolyte has, however, not been found yet. One of the most important properties which decides whether a ceramic is useful to work as electrolyte is ionic transport. The various time-domain nuclear magnetic resonance (NMR) techniques might help characterize and select the most suitable candidates. Together with conductivity measurements it is possible to analyze ion dynamics on different length-scales, i.e., to differentiate between local, within-site hopping processes from long-range ion transport. The latter needs to be sufficiently fast in the ceramic, in the best case competing with that of liquid electrolytes. In addition to conductivity spectroscopy, NMR can help understand the relationship between local structure and dynamic parameters. Besides information on activation energies and jump rates the data also contain suggestions about the relevant elementary steps of ion hopping and, thus, Support by the Deutsche Forschungsgemeinschaft (DFG) is highly appreciated (FOR 1277 diffusion pathways through the crystal lattice. Recent progress in characterizing ion dynamics in ceramic electrolytes by NMR relaxometry will be briefly reviewed. Focus is put on presently discussed solid electrolytes such as garnets, phosphates and sulfides, which have so far been studied in our lab.

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Section: Sulfides: LI 6 Ps 5 Br and Li 7 P 3 S 11supporting

confidence: 66%

Section: Sulfides: LI 6 Ps 5 Br and Li 7 P 3 S 11mentioning

confidence: 99%

Section: Sulfides: LI 6 Ps 5 Br and Li 7 P 3 S 11mentioning

confidence: 99%

Section: Sulfides: LI 6 Ps 5 Br and Li 7 P 3 S 11mentioning

confidence: 99%

Section: Sulfides: LI 6 Ps 5 Br and Li 7 P 3 S 11mentioning

confidence: 99%

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Ion dynamics in solid electrolytes for lithium batteries

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Solid‐State Electrolyte

Luo

2019

Encyclopedia of Inorganic and Bioinorganic Chemistry

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Solid‐state lithium‐ion batteries (SSLIBs) are attracting attention owing to the benefits of their nonflammable nature, wide operable‐temperature range, potential high energy density, and simple packaging, which may significantly improve the safety of LIBs and boost the development of electric vehicles. As the most important component in SSLIBs, solid‐state electrolytes (SSEs), and especially inorganic SSEs, are critical for delivering on the promise of this technology. In this article, we present a survey of inorganic SSEs, ranging from lithium oxysalts, perovskites and antiperovskites, NASICON‐type Li ion conductors, garnet‐type lithium oxides, lithium sulfide glasses, lithium sulfide glass‐ceramics, crystalline lithium sulfide, thin‐film‐type LiPON, Li 3 N, and others.

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Recent Advances in Liquid‐Like Thermoelectric Materials

Zhao

Qiu

Shi

et al. 2019

Adv Funct Materials

167

121

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Thermoelectric technology has attracted great attention due to its ability to recover and convert waste heat into readily available electric energy. Among the various candidate materials, liquid‐like compounds have received tremendous research interest on account of their intrinsically ultralow lattice thermal conductivity, tunable electrical properties, and high thermoelectric performance. Despite their complex phase transitions and diverse crystal structures, liquid‐like materials have two independent sublattices in common: one rigid sublattice formed by immobile ions for the free transport of electrons and one liquid‐like sublattice consisting of highly mobile ions to interrupt the thermal transports. This review first outlines the common structural features of liquid‐like thermoelectrics, along with their unusual electron and phonon transport behaviors that well satisfy the concept of “phonon‐liquid electron‐crystal.” Next, some commonly adopted strategies for further improving their thermoelectric performance are highlighted. The main progress achieved in the typical liquid‐like TE materials is then summarized, with an emphasis on their diverse crystal structures, common characteristics, and unique transport properties. The recent understandings on the stability issue of liquid‐like TE materials are also introduced. Finally, an outlook is given for the liquid‐like materials with the aim to boost further development in this exciting scientific subfield.

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Highly Mobile Ions: Low-Temperature NMR Directly Probes Extremely Fast Li⁺ Hopping in Argyrodite-Type Li₆PS₅Br

Cited by 125 publications

References 48 publications

Ion dynamics in solid electrolytes for lithium batteries

Ion dynamics in solid electrolytes for lithium batteries

Solid‐State Electrolyte

Recent Advances in Liquid‐Like Thermoelectric Materials

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