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DOI | 10.1038/ncomms15329 |
Characteristic fast H- ion conduction in oxygen-substituted lanthanum hydride | |
Fukui, Keiga1; Iimura, Soshi1; Tada, Tomofumi2; Fujitsu, Satoru2; Sasase, Masato2; Tamatsukuri, Hiromu3; Honda, Takashi3,4; Ikeda, Kazutaka3,4; Otomo, Toshiya3,4; Hosono, Hideo1,2 | |
2019-06-12 | |
发表期刊 | NATURE COMMUNICATIONS |
ISSN | 2041-1723 |
出版年 | 2019 |
卷号 | 10 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan |
英文摘要 | Fast ionic conductors have considerable potential to enable technological development for energy storage and conversion. Hydride (H-) ions are a unique species because of their natural abundance, light mass, and large polarizability. Herein, we investigate characteristic H- conduction, i.e., fast ionic conduction controlled by a pre-exponential factor. Oxygen-doped LaH3 (LaH3-2xOx) has an optimum ionic conductivity of 2.6 x10(-2) S cm(-1), which to the best of our knowledge is the highest H- conductivity reported to date at intermediate temperatures. With increasing oxygen content, the relatively high activation energy remains unchanged, whereas the pre-exponential factor decreases dramatically. This extraordinarily large pre-exponential factor is explained by introducing temperature-dependent enthalpy, derived from H- trapped by lanthanum ions bonded to oxygen ions. Consequently, light mass and large polarizability of H-, and the framework comprising densely packed H- in LaH3-2xOx are crucial factors that impose significant temperature dependence on the potential energy and implement characteristic fast H- conduction. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000471224100008 |
WOS关键词 | TOTAL-ENERGY CALCULATIONS ; THERMAL-CONDUCTIVITY ; CRYSTAL ; PARAMETERS ; SCATTERING ; PD |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/203294 |
专题 | 资源环境科学 |
作者单位 | 1.Tokyo Inst Technol, Lab Mat & Struct, Yokohama, Kanagawa 2268503, Japan; 2.Tokyo Inst Technol, Mat Res Ctr Element Strategy, Yokohama, Kanagawa 2268503, Japan; 3.High Energy Accelerator Res Org KEK, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan; 4.Grad Univ Adv Studies, Dept Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan |
推荐引用方式 GB/T 7714 | Fukui, Keiga,Iimura, Soshi,Tada, Tomofumi,et al. Characteristic fast H- ion conduction in oxygen-substituted lanthanum hydride[J]. NATURE COMMUNICATIONS,2019,10. |
APA | Fukui, Keiga.,Iimura, Soshi.,Tada, Tomofumi.,Fujitsu, Satoru.,Sasase, Masato.,...&Hosono, Hideo.(2019).Characteristic fast H- ion conduction in oxygen-substituted lanthanum hydride.NATURE COMMUNICATIONS,10. |
MLA | Fukui, Keiga,et al."Characteristic fast H- ion conduction in oxygen-substituted lanthanum hydride".NATURE COMMUNICATIONS 10(2019). |
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