Rapid crystallization of Li1.5Al0.5Ge1.5(PO4)3 glass ceramics via ultra-fast high-temperature sintering (UHS) |
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| Authors: | Jinghua Wu Milad Kermani Lei Cao Bohan Wang Zhiquan Dai Le Fu Chunfeng Hu Salvatore Grasso |
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| Affiliation: | 1. Key Laboratory of Advanced technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, China;2. School of Materials Science and Engineering, Central South University, Changsha, China;3. School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London, UK |
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| Abstract: | Lithium aluminum germanium phosphate solid electrolyte is a promising candidate for all-solid-state batteries. The currently available processing techniques based on melting-quenching require a rather lengthy crystallization step lasting up to 8 hours. In this work, the newly emerged ultra-fast high-temperature sintering (UHS) was proposed to achieve in a single step reactive consolidation of powder mixture (GeO2, Al(PO3)3, LiPO3) and crystallization of the electrolyte within 16 minutes. Samples produced using UHS had a better phase purity, reduced Li loss, and improved ionic conductivity when compared to the counterparts prepared using conventional crystallization at 850°C for 6 h. In fact, specimens prepared by UHS achieved a crystallinity of 90% and ionic conductivity as high as 1.31 × 10−4 S cm−1. |
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| Keywords: | crystals/crystallization glass-ceramics heat treatment LAGP |
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