Enhanced densification and conductivity of LAMGPB glass-ceramic electrolyte through ultra-fast high-temperature sintering

IF 8.1 2区 工程技术 Q1 CHEMISTRY, PHYSICAL
Sofia Saffirio , Antonio Gianfranco Sabato , Daiana Marcia Ferreira , Albert Tarancón , Claudio Gerbaldi , Federico Smeacetto
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引用次数: 0

Abstract

The promising use of NASICON-type ceramics electrolytes highlights the need for rapid, energy-efficient and scalable ceramic processing. Ultra-fast high-temperature sintering (UHS) overcomes the limitations of conventional sintering including prolonged times, high energy demand and lithium volatilization, which can adversely affect ionic conductivity and structural stability. Here, UHS is investigated for the sintering of a modified Li1.5Al0.3Mg0.1Ge1.6(PO4)3 + 0.5 wt% B2O3 composition (namely, LAMGPB) obtained through melt-casting, in comparison with a commercial LAGP counterpart. The densification, crystallization behavior and microstructural evolution of the two amorphous systems are investigated across increasing currents. Results demonstrate that the high heating rates achieved through UHS promote rapid densification and enable the formation of a fully crystalline and pure LAGP ion-conducting phase in both systems. Electrochemical impedance spectroscopy reveals an enhanced total ionic conductivity for LAMGPB compared to commercial LAGP. A reduced grain boundary resistance is indeed observed for this system, attributed to the improved grain size and cohesion induced by the segregation of amorphous B2O3 at the grain boundary. Overall, this study sheds light on the correlations between the crystal phase evolutions, microstructural features and electrochemical performances of NASICON-type systems, unravelling the effect of UHS sintering and oxide doping on these aspects.

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来源期刊
Journal of Power Sources
Journal of Power Sources 工程技术-电化学
CiteScore
16.40
自引率
6.50%
发文量
1249
审稿时长
36 days
期刊介绍: The Journal of Power Sources is a publication catering to researchers and technologists interested in various aspects of the science, technology, and applications of electrochemical power sources. It covers original research and reviews on primary and secondary batteries, fuel cells, supercapacitors, and photo-electrochemical cells. Topics considered include the research, development and applications of nanomaterials and novel componentry for these devices. Examples of applications of these electrochemical power sources include: • Portable electronics • Electric and Hybrid Electric Vehicles • Uninterruptible Power Supply (UPS) systems • Storage of renewable energy • Satellites and deep space probes • Boats and ships, drones and aircrafts • Wearable energy storage systems
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