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Tracer diffusion coefficient measurements on NASICON-type Lithium-ion conductor LAGP using neutron radiography between 25$$^{circ}$$C and 500$$^{circ}$$C

Takagi, Honoka*; Yabutsuka, Takeshi*; Hayashida, Hirotoshi*; Song, F.; Kai, Tetsuya   ; Shinohara, Takenao   ; Kurita, Keisuke  ; Iikura, Hiroshi  ; Yamamoto, Norio*; Nakajima, Minoru*; Takai, Shigeomi*

Tracer diffusion coefficients of lithium-ions in the sintered samples of Li$$_{1.5}$$Al$$_{0.5}$$Ge$$_{1.5}$$(PO$$_4$$)$$_3$$ (LAGP) have been measured through the neutron radiography (NR) technique in the wide temperature range from 25$$^{circ}$$C to 500$$^{circ}$$C. The diffusion data above and below 300$$^{circ}$$C were collected using pulsed and reactor-generated neutrons, respectively, which coincide with each other at 300$$^{circ}$$C exhibiting a single curve in the Arrhenius plot. The room-temperature diffusion coefficient and the activation energy below 300$$^{circ}$$C are obtained as 1.47$$times$$10$$^{-9}$$ cm$$^2$$ s$$^{-1}$$ and 0.37 eV, respectively. The activation energy of the conductivity diffusion coefficient almost agrees with the tracer one, and the deduced Haven ratio of 0.40 is consistent with the concerted migration model of the lithium-ions.

Language

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English

Journal

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Solid State Ionics

Volume

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417

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Pages

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p.116716_1 - 116716_7

Publication Year/Month

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2024/12

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Paper URL

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https://doi.org/10.1016/j.ssi.2024.116716

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Keywords

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中性子ラジオグラフィー; J-PARC; JRR-3M

Research Facility

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JRR-3M(研究炉3)  ;J-PARC物質・生命科学実験施設  

Press Release

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Article of JAEA R&D Review

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Cooperating Institute

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Category:Chemistry, Physical

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