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Dense Freeze‐cast Li_7La_3Zr_2O_(12) Solid Electrolytes with Oriented Open Porosity and Contiguous Ceramic Scaffold

Buannic, Lucienne and Naviroj, Maninpat and Miller, Sarah M. and Zagorski, Jakub and Faber, Katherine T. and Llordés, Anna (2019) Dense Freeze‐cast Li_7La_3Zr_2O_(12) Solid Electrolytes with Oriented Open Porosity and Contiguous Ceramic Scaffold. Journal of the American Ceramic Society, 102 (3). pp. 1021-1029. ISSN 0002-7820. doi:10.1111/jace.15938.

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Freeze casting is used for the first time to prepare solid electrolyte scaffolds with oriented porosity and dense ceramic walls made of Li_7La_3Zr_2O_(12) (LLZO), one of the most promising candidates for solid state battery electrolytes. Processing parameters ‐ such as solvent solidification rate, solvent type, and ceramic particle size ‐ are investigated, focusing on their influence on porosity and ceramic wall density. Dendrite‐like porosity is obtained when using cyclohexane and dioxane as solvents. Lamellar porosity is observed in aqueous slurries resulting in a structure with the highest apparent porosity and densest ceramic scaffold but weakest mechanical properties due to the lack of interlamellar support. The use of smaller LLZO particle size in the slurries resulted in lower porosity and denser ceramic walls. The intrinsic ionic conductivity of the oriented LLZ ceramic scaffold is unaffected by the freeze casting technique, providing a promising ceramic scaffold for polymer infill in view of designing new types of ceramic‐polymer composites.

Item Type:Article
Related URLs:
URLURL TypeDescription
Buannic, Lucienne0000-0003-3055-4058
Miller, Sarah M.0000-0001-8462-1063
Faber, Katherine T.0000-0001-6585-2536
Alternate Title:Dense Freeze‐cast Li7La3Zr2O12 Solid Electrolytes with Oriented Open Porosity and Contiguous Ceramic Scaffold
Additional Information:© 2018 American Ceramic Society. Issue Online: 04 January 2019; Version of Record online: 06 August 2018; Accepted manuscript online: 13 July 2018; Manuscript accepted: 08 July 2018; Manuscript revised: 27 June 2018; Manuscript received: 17 April 2018. This work was conducted at Caltech (USA) and CIC Energigune (Spain) within the framework of a Jose Castillejo mobility fellowship from the Spanish Ministry of Education, Culture, and Sports received by L.B. This work was also supported by the Basque government through the ELKARTEK 15 program. A.L. acknowledges financial support from IKERBASQUE. K.T.F. and M.N. acknowledge the support of the US National Science Foundation through DMR-1411218. L.B. also thanks Dr. Matthew Johnson and Neal Brodnik for helpful discussions.
Funding AgencyGrant Number
Ministerio de Educación, Cultura y Deporte (MECD)UNSPECIFIED
Basque Foundation for Science (IKERBASQUE)ELKARTEK 15
Subject Keywords:composite electrolyte, freeze casting, Li_7La_3Zr_2O_(12), porous ceramic scaffold, solid-state batteries
Issue or Number:3
Record Number:CaltechAUTHORS:20180713-090924787
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Official Citation:Buannic L, Naviroj M, Miller SM, Zagorski J, Faber KT, Llordés A. Dense freeze‐cast Li7La3Zr2O12 solid electrolytes with oriented open porosity and contiguous ceramic scaffold. J Am Ceram Soc. 2019;102:1021–1029.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87818
Deposited By: George Porter
Deposited On:13 Jul 2018 16:52
Last Modified:15 Nov 2021 20:52

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