TY - JOUR
T1 - Cold sintering process of Li1.5Al0.5Ge1.5(PO4)3 solid electrolyte
AU - Berbano, Seth S.
AU - Guo, Jing
AU - Guo, Hanzheng
AU - Lanagan, Michael T.
AU - Randall, Clive A.
N1 - Funding Information:
This material is based on work supported by the National Science Foundation (NSF) as part of the Center for Dielectrics and Piezoelectrics (IIP-1361571 and 1361503), NSF GRFP (DGE-1255832), NSF-ERC ASSIST (EEC-1160483), 3M Science and Technology Fellowship, and Department of Energy GATE Fellowship (DE-FOA-0000442). Any opinion, findings, and conclusions or recommendations expressed are those of the authors and do not necessarily reflect the views of the NSF. Authors thank Penn State researchers, L. Gao, Dr. M. Mirsaneh Prof. R. Rajagopalan, Dr. F. Zuo, and Prof. D. Agrawal, for helpful discussions & J. Anderson, A. Baker, Dr. J. Banerjee, Dr. T. Clark, J. Long, and N. Wonderling, for instrumentation support.
Publisher Copyright:
© 2017 The American Ceramic Society
PY - 2017/5/1
Y1 - 2017/5/1
N2 - The recently developed technique of cold sintering process (CSP) enables densification of ceramics at low temperatures, i.e., <300°C. CSP employs a transient aqueous solvent to enable liquid phase-assisted densification through mediating the dissolution-precipitation process under a uniaxial applied pressure. Using CSP in this study, 80% dense Li1.5Al0.5Ge1.5(PO4)3 (LAGP) electrolytes were obtained at 120°C in 20 minutes. After a 5 minute belt furnace treatment at 650°C, 50°C above the crystallization onset, Li-ion conductivity was 5.4 × 10−5S/cm at 25°C. Another route to high ionic conductivities ~10−4 S/cm at 25°C is through a composite LAGP - (PVDF-HFP) co-sintered system that was soaked in a liquid electrolyte. After soaking 95, 90, 80, 70, and 60 vol% LAGP in 1 M LiPF6 EC-DMC (50:50 vol%) at 25°C, Li-ion conductivities were 1.0 × 10−4 S/cm at 25°C with 5 to 10 wt% liquid electrolyte. This paper focuses on the microstructural development and impedance contributions within solid electrolytes processed by (i) Crystallization of bulk glasses, (ii) CSP of ceramics, and (iii) CSP of ceramic-polymer composites. CSP may offer a new route to enable multilayer battery technology by avoiding the detrimental effects of high temperature heat treatments.
AB - The recently developed technique of cold sintering process (CSP) enables densification of ceramics at low temperatures, i.e., <300°C. CSP employs a transient aqueous solvent to enable liquid phase-assisted densification through mediating the dissolution-precipitation process under a uniaxial applied pressure. Using CSP in this study, 80% dense Li1.5Al0.5Ge1.5(PO4)3 (LAGP) electrolytes were obtained at 120°C in 20 minutes. After a 5 minute belt furnace treatment at 650°C, 50°C above the crystallization onset, Li-ion conductivity was 5.4 × 10−5S/cm at 25°C. Another route to high ionic conductivities ~10−4 S/cm at 25°C is through a composite LAGP - (PVDF-HFP) co-sintered system that was soaked in a liquid electrolyte. After soaking 95, 90, 80, 70, and 60 vol% LAGP in 1 M LiPF6 EC-DMC (50:50 vol%) at 25°C, Li-ion conductivities were 1.0 × 10−4 S/cm at 25°C with 5 to 10 wt% liquid electrolyte. This paper focuses on the microstructural development and impedance contributions within solid electrolytes processed by (i) Crystallization of bulk glasses, (ii) CSP of ceramics, and (iii) CSP of ceramic-polymer composites. CSP may offer a new route to enable multilayer battery technology by avoiding the detrimental effects of high temperature heat treatments.
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U2 - 10.1111/jace.14727
DO - 10.1111/jace.14727
M3 - Article
AN - SCOPUS:85014519506
SN - 0002-7820
VL - 100
SP - 2123
EP - 2135
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 5
ER -