Tracer diffusion coefficient measurements on NASICON-type Lithium-ion conductor LAGP using neutron radiography between 25 °C and 500 °C

IF 3 4区材料科学 Q3 CHEMISTRY, PHYSICAL

Solid State Ionics Pub Date : 2024-10-14 DOI:10.1016/j.ssi.2024.116716

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

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引用次数: 0

Abstract

Tracer diffusion coefficients of lithium-ions in the sintered samples of Li_1.5Al_0.5Ge_1.5(PO₄)₃ (LAGP) have been measured through the neutron radiography (NR) technique in the wide temperature range from 25 °C to 500 °C. The diffusion data above and below 300 °C were collected using pulsed and reactor-generated neutrons, respectively, which coincide with each other at 300 °C exhibiting a single curve in the Arrhenius plot. The room-temperature diffusion coefficient and the activation energy below 300 °C are obtained as 1.47 × 10⁻⁹ cm² 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.

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利用中子射线照相法测量 NASICON 型锂离子导体 LAGP 在 25 °C 至 500 °C 之间的示踪剂扩散系数

通过中子射线照相（NR）技术测量了锂1.5Al0.5Ge1.5(PO4)3（LAGP）烧结样品中锂离子的示踪扩散系数，温度范围从 25 °C 到 500 °C。300 ℃以上和 300 ℃以下的扩散数据分别使用脉冲中子和反应堆产生的中子采集，在阿伦尼乌斯曲线图中，这两种中子在 300 ℃时相互重合。室温扩散系数和 300 °C 以下的活化能分别为 1.47 × 10-9 cm2 s-1 和 0.37 eV。电导扩散系数的活化能与示踪剂的活化能基本一致，推导出的哈文比率为 0.40，符合锂离子的协同迁移模型。

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来源期刊

Solid State Ionics 物理-物理：凝聚态物理

CiteScore

6.10

自引率

3.10%

发文量

152

审稿时长

58 days

期刊介绍： This interdisciplinary journal is devoted to the physics, chemistry and materials science of diffusion, mass transport, and reactivity of solids. The major part of each issue is devoted to articles on: (i) physics and chemistry of defects in solids; (ii) reactions in and on solids, e.g. intercalation, corrosion, oxidation, sintering; (iii) ion transport measurements, mechanisms and theory; (iv) solid state electrochemistry; (v) ionically-electronically mixed conducting solids. Related technological applications are also included, provided their characteristics are interpreted in terms of the basic solid state properties. Review papers and relevant symposium proceedings are welcome.