Please use this identifier to cite or link to this item: https://doi.org/10.1039/c9ra00711c
Title: Preparation of thin solid electrolyte by hot-pressing and diamond wire slicing
Authors: Kotobuki, M. 
Lei, H.
Chen, Y.
Song, S.
Xu, C.
Hu, N.
Molenda, J.
Lu, L.
Issue Date: 2019
Publisher: Royal Society of Chemistry
Citation: Kotobuki, M., Lei, H., Chen, Y., Song, S., Xu, C., Hu, N., Molenda, J., Lu, L. (2019). Preparation of thin solid electrolyte by hot-pressing and diamond wire slicing. RSC Advances 9 (21) : 11670-11675. ScholarBank@NUS Repository. https://doi.org/10.1039/c9ra00711c
Rights: Attribution-NonCommercial 4.0 International
Abstract: The thickness of a solid electrolyte influences the performance of all-solid-state batteries due to increased impedance with a thick electrolyte. Thin solid electrolytes are favourable to improve the performance of all-solid-state batteries due to the short Li ion diffusion path and small volume of the solid electrolytes. Therefore, the preparation of thin solid electrolyte is one of the key process techniques for development of all-solid-state batteries. In this study, thin Li1.5Ge1.5Al0.5(PO4)3 solid electrolyte with a Na super ion conductor structure is prepared by diamond wire slicing. The Li1.5Ge1.5Al0.5(PO4)3 solid electrolyte is prepared by melt-quenching followed by crystallization at 800 °C for 8 h, after which the crystallized Li1.5Ge1.5Al0.5(PO4)3 rod is subjected to wire slicing. Thin Li1.5Ge1.5Al0.5(PO4)3 with a thickness of 200 ?m is obtained. The crystal structure and cross-sectional morphology are not affected by the slicing. The total Li conductivity of the thin Li1.5Ge1.5Al0.5(PO4)3 and activation energy are 3.3 × 10-4 S cm-1 and 0.32 eV, respectively. The thickness and total conductivity are comparable to those of Li1.5Ge1.5Al0.5(PO4)3 prepared by the tape-casting method which needs several steps to prepare Li1.5Ge1.5Al0.5(PO4)3 tape-sheet and high temperature and a long sintering process. The ionic transference number of the thin Li1.5Ge1.5Al0.5(PO4)3 is 0.999. The diamond wire slicing is a useful method to prepare thin solid electrolytes. © 2019 The Royal Society of Chemistry.
Source Title: RSC Advances
URI: https://scholarbank.nus.edu.sg/handle/10635/209625
ISSN: 2046-2069
DOI: 10.1039/c9ra00711c
Rights: Attribution-NonCommercial 4.0 International
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