A Lithium Amide‐Borohydride Solid‐State Electrolyte with Lithium‐Ion Conductivities Comparable to Liquid Electrolytes. Issue 19 (9th June 2017)

• Record Type: Journal Article
• Authors: Yan, Yigang; Kühnel, Ruben‐Simon; Remhof, Arndt; Duchêne, Léo; Reyes, Eduardo Cuervo; Rentsch, Daniel; Łodziana, Zbigniew; Battaglia, Corsin
• Is Part Of: Advanced energy materials. Volume 7:Issue 19(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-06-09
• Subjects: all‐solid‐state lithium‐ion batteries -- complex hydrides -- solid‐state electrolytes; Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.201700294
• Languages: English
• ISSNs: 1614-6832

Abstract

Abstract: High ionic conductivity of up to 6.4 × 10 −3 S cm −1 near room temperature (40 °C) in lithium amide‐borohydrides is reported, comparable to values of liquid organic electrolytes commonly employed in lithium‐ion batteries. Density functional theory is applied coupled with X‐ray diffraction, calorimetry, and nuclear magnetic resonance experiments to shed light on the conduction mechanism. A Li4 Ti5 O12 half‐cell battery incorporating the lithium amide‐borohydride electrolyte exhibits good rate performance up to 3.5 mA cm −2 (5 C) and stable cycling over 400 cycles at 1 C at 40 °C, indicating high bulk and interfacial stability. The results demonstrate the potential of lithium amide‐borohydrides as solid‐state electrolytes for high‐power lithium‐ion batteries. Abstract : A lithium amide‐borohydride superionic solid‐state electrolyte with conductivities exceeding 10 −3 S cm −1 near room temperature is developed. Integrated in an Li4 Ti5 O12 ‐based half‐cell, a high rate performance and stable cycling over 400 cycles at 1 C is achieved, demonstrating its potential as electrolyte for high‐power lithium‐ion batteries.