Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6603150 | Electrochimica Acta | 2018 | 10 Pages |
Abstract
Despite the intense concentration on lithium-based batteries, safety, ease of construction and cost continue to drive the search for alternatives that do not suffer from such restrictions. We present here preliminary work on the development of thin film Mg2+ conducting electrolytes as the key starting point for the development of all-solid-state Mg batteries. Initial studies explored compositions in the Mg0.5CexZr2-x(PO4)3 (xâ¯=â¯0.1, 0.2 and 0.3) system first as pellets and with somewhat optimized compositions (with xâ¯=â¯0.2) as thin films. Introduction of Ce allows sintering to full density at temperatures where Ce free films do not densify completely. The work reported here relies on the synthesis of nanopowders (NPs) using liquid-feed flame spray pyrolysis that offers the potential to reduce processing conditions, to control final average grain sizes (AGSs) and provide single-phase materials with good to excellent mechanical properties. The pellets and then thin (â¤50â¯Î¼m) films produced here show conductivities of up to 3â¯Ãâ¯10â3â¯mSâ¯cm-1â¯atâ¯ââ¯300â¯Â°C, which if extrapolated (using an Ea of â30) to 400â¯Â°C would be close to 10â2â¯mSâ¯cmâ1 in keeping with the best reported values in the literature. The thin films reported here offer nearly full densities beyond what is currently achievable by any other method. The ionic area specific resistance (IASR) values for these thin films were found to be 1400â¯Î©â¯cm2â¯at 300â¯Â°C and are estimated to drop to 110â¯Î©â¯cm2â¯at 400â¯Â°C, significantly lower than values for pellets reported elsewhere.
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Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
B. Liang, V. Keshishian, S. Liu, E. Yi, D. Jia, Y. Zhou, J. Kieffer, B. Ye, R.M. Laine,