Sol-Gel법에 의한 Li1.5Al0.5Ti1.5(PO4)3 고체전해질 제조 및 chelating agent의 영향
Effect of Chelating Agent on Li1.5Al0.5Ti1.5(PO4)3 Particles by Sol-gel Method and Densification
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Li1.5Al0.5Ti1.5(PO4)3 (LATP) is considered to be one of the promising solid-state electrolytes owing to its excellent chemical and thermal stability, wide potential range (~5.0 V), and high ionic conductivity (~10-4 S/cm). LATP powders are typically prepared via the sol-gel method by adding and mixing nitrate or alkoxide precursors with chelating agents. Here, the thermal properties, crystallinity, density, particle size, and distribution of LATP powders based on chelating agents (citric acid, acetylacetone, EDTA) are compared to find the optimal conditions for densely sintered LATP with high purity. In addition, the three types of LATP powders are utilized to prepare sintered solid electrolytes and observe the microstructure changes during the sintering process. The pyrolysis onset temperature and crystallization temperature of the powder samples are in the order AC-LATP > CA-LATP > ED-LATP, and the LATP powder utilizing citric acid exhibits the highest purity, as no secondary phase other than LiTi2PO4 phase is observed. LATP with citric acid and acetylacetone has a value close to the theoretical density (2.8 g/cm3) after sintering. In comparison, LATP with EDTA has a low sintered density (2.2 g/cm3) because of the generation of many pores after sintering.
Abstract
Li1.5Al0.5Ti1.5(PO4)3 (LATP) is considered to be one of the promising solid-state electrolytes owing to its excellent chemical and thermal stability, wide potential range (~5.0 V), and high ionic conductivity (~10-4 S/cm). LATP powders are typically prepared via the sol-gel method by adding and mixing nitrate or alkoxide precursors with chelating agents. Here, the thermal properties, crystallinity, density, particle size, and distribution of LATP powders based on chelating agents (citric acid, acetylacetone, EDTA) are compared to find the optimal conditions for densely sintered LATP with high purity. In addition, the three types of LATP powders are utilized to prepare sintered solid electrolytes and observe the microstructure changes during the sintering process. The pyrolysis onset temperature and crystallization temperature of the powder samples are in the order AC-LATP > CA-LATP > ED-LATP, and the LATP powder utilizing citric acid exhibits the highest purity, as no secondary phase other than LiTi2PO4 phase is observed. LATP with citric acid and acetylacetone has a value close to the theoretical density (2.8 g/cm3) after sintering. In comparison, LATP with EDTA has a low sintered density (2.2 g/cm3) because of the generation of many pores after sintering.
참고문헌 (30)
- R. Shah, , Adv. Mech. Eng, 13, pp.1687~ (2021)
- G. G. Eshetu, , Nat. Commun, 12, pp.5459~ (2021)
- M. Fichtner, , Batter. Supercaps, 5, pp.2566~ (2022)
- J. Lau, , Adv. Energy Mater, 8, pp.1800933~ (2018)
- M. Qin, , Interdiscip Mater, 2, pp.308~ (2023)
- A. Sohib, , J. Phys.: Conf. Ser, 2243, pp.012044~ (2022)
- Feng Jingnan, "PEO based polymer-ceramic hybrid solid electrolytes: a review", Nano Convergence, 8(2), pp.1~12 (2021), 나노기술연구협의회[DOI]
- S. Chen, , Energy Stor. Mater, 14, pp.58~ (2018)
- K. Kerman, , J. Electrochem. Soc, 164, pp.1731~ (2017)
- M. V. Reddy, , K:Nanomaterials, 10, pp.1606~ (2020)
- F. Ichilhara, , Phys. Chem. Chem. Phys, 24, pp.25878~ (2022)
- H. Raj, , ACS Appl. Energy Mater, 6, pp.1197~ (2023)
- R. DeWees, , ChemSusChem, 12, pp.3713~ (2019)
- C. -J. Park, , ACS Appl. Mater. Interfaces, 15, pp.26985~ (2023)
- Q. Ma, , J. Am. Ceram. Soc, 99, pp.410~ (2016)
- A. Wibowo, , Conf. Ser.: Mater. Sci. Eng, 509, pp.012021~ (2019)
- R. Wei, , Nano Select, 2, pp.2256~ (2021)
- K. Sinwinska-Stefanska, , J. Sol-Gel. Technol, 75, pp.264~ (2015)
- B. J. Hwang, , J. Power Sources, 97, pp.443~ (2001)
- M. S. Mastuli, , Nanoscale Res Lett, 9, pp.134~ (2014)
- N. Osman, , Ceram. Int, 48, pp.2289~ (2022)
- Y. -S. Ho, , Int. J. Appl. Ceram. Technol, 12, pp.E53~ (2015)
- N. A. Abdullah, , Int. J. Electrochem. Sci, 7, pp.9401~ (2012)
- M. R. Ghaani, , Batteries, 6, pp.48~ (2020)
- D. Chen, , J. Mater Sci: Mater. Electron, 31, pp.13724~ (2020)
- X. Hu, , J. Electrochem. Soc, 165, pp.1269~ (2018)
- S. Duluard, , J. Eur. Ceram. Soc, 33, pp.1145~ (2013)
- G. Zhang, , Ceram. Int, 48, pp.25120~ (2022)
- Y. Zhang, , Ceram. Int, 48, pp.18165~ (2022)
- P. Liang, , Batteries, 15, pp.2232~ (2022)