TY - JOUR
T1 - Preparation and characterization of large area Li-NASICON electrolyte thick films
AU - Jiménez, Ricardo
AU - Sobrados, Isabel
AU - Martínez-Chaparro, Sandra
AU - del Campo, Angel Adolfo
AU - Lourdes Calzada, M.
AU - Sanz, Jesús
AU - Tsai, Shu Yi
AU - Lin, Ming Rui
AU - Fung, Kuan Zong
AU - Kazakevicius, Edvardas
AU - Kežionis, Algimantas
N1 - Publisher Copyright:
© 2019 by the authors.
PY - 2019/9/1
Y1 - 2019/9/1
N2 - The preparation of solid electrolyte ceramic membranes is the object of intense study for its fundamental parts in the development of all solid-state batteries and improved battery separators. In this work, the procurement of large area solid electrolyte ceramic thick film membranes of the Li-NASICON Li1.3Al0.3Ti1.7(PO4)3 (LATP) composition is attempted. Through the use of LATP powders from a sol-gel reaction, a slurry is formulated and tape casted. The green tapes are sintered using two sintering times. In both cases, ceramic thick films of a 5.5 × 5.5 cm_asuf area and ≈250 μm average thickness were obtained. The characterization indicated almost pure phase samples with a bi-modal microstructure composed of large and smaller grains, being larger for longer sintering time. The samples are porous and brittle, presenting very high "bulk" conductivity but lower total direct current (DC) one, as compared with the commercial Li-NASICON (OHARA) thick films with a similar area. The larger the grains, the poorer the total conductivity and the mechanical properties of the thick-films. The formation of poorly adhering grain boundaries as the grain size grows is responsible for the worsened properties. A better control of the microstructure is mandatory.
AB - The preparation of solid electrolyte ceramic membranes is the object of intense study for its fundamental parts in the development of all solid-state batteries and improved battery separators. In this work, the procurement of large area solid electrolyte ceramic thick film membranes of the Li-NASICON Li1.3Al0.3Ti1.7(PO4)3 (LATP) composition is attempted. Through the use of LATP powders from a sol-gel reaction, a slurry is formulated and tape casted. The green tapes are sintered using two sintering times. In both cases, ceramic thick films of a 5.5 × 5.5 cm_asuf area and ≈250 μm average thickness were obtained. The characterization indicated almost pure phase samples with a bi-modal microstructure composed of large and smaller grains, being larger for longer sintering time. The samples are porous and brittle, presenting very high "bulk" conductivity but lower total direct current (DC) one, as compared with the commercial Li-NASICON (OHARA) thick films with a similar area. The larger the grains, the poorer the total conductivity and the mechanical properties of the thick-films. The formation of poorly adhering grain boundaries as the grain size grows is responsible for the worsened properties. A better control of the microstructure is mandatory.
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U2 - 10.3390/inorganics7090107
DO - 10.3390/inorganics7090107
M3 - Article
AN - SCOPUS:85072568229
SN - 2304-6740
VL - 7
JO - Inorganics
JF - Inorganics
IS - 9
M1 - 107
ER -