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Correlation study on temperature dependent conductivity and line profile along the LLTO/LFP-C cross section for all solid-state Lithium-ion batteries

Abhilash, K. P. and Selvin, P. Christopher and Nalini, B. and Rajan, Jose and Hui, Xia and Elim, Hendry Izaac and Reddy, M. V. (2019) Correlation study on temperature dependent conductivity and line profile along the LLTO/LFP-C cross section for all solid-state Lithium-ion batteries. Solid State Ionics, 341. pp. 1-2. ISSN 0167-2738

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Abstract

Nanocrystalline lithium lanthanum titanate (LLTO) – lithium iron phosphate (LFP/C) layered pellets have been prepared to analyze its interface for all solid-state batteries. The conductivity of the samples as a function of temperatures was analyzed and reported. The total conductivity of the sample at room temperature is in the order of 10−5 S cm−1. The SEM and line scan analysis of the samples have been carried out across the cross sections at different temperatures. The study gives a correlation between the line profiles across the LLTO-LFP/C interface and the temperature dependent conductivity of the sample at various temperatures for the first time. At lower temperatures up to 398 K, a narrow interface region occurs at the LLTO – LFP/C interface. At higher temperatures, the ions of elements with higher atomic mass than the lithium, such as lanthanum, iron, titanium, are also accumulate near the interface, which have been verified from the broad interface region occurring in the elemental line scan mapping across the interface. This accumulation of ions causes an additional impediment to the movement of Li+ ions which results in the breakdown in conductivity at 448 K.

Item Type: Article
Additional Information: Indexed by Scopus
Uncontrolled Keywords: Nanomaterial; Line-scan analysis; Impedance spectroscopy; Conductivity; Interface
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
T Technology > TP Chemical technology
Faculty/Division: Faculty of Industrial Sciences And Technology
Depositing User: Mrs Norsaini Abdul Samat
Date Deposited: 06 Dec 2019 08:19
Last Modified: 06 Dec 2019 08:19
URI: http://umpir.ump.edu.my/id/eprint/26171
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