Lithium ion conductivity of halides with a defect spinel structure

具有缺陷尖晶石结构的卤化物的锂离子电导率

• 批准号: 18550127
• 负责人: YAMADA Koji
• 金额: $ 1.96万
• 依托单位: Nihon University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18550127/
• 关键词: Lithium bromide; Indium; Rock salt structure; Spinel structure; Ionic conductivity; Rietveld analysis; 7Li NMR; 115In NMR; スピネル構造; イオン伝導; リートベルド解析; イオン結晶; リチウムイオン伝導体

Ionic conductivity is one of the functional properties of material. The preparation of the new materials having high ionic conductivity is a key technology for the development of fuel cell or secondary battery. In this research, solid electrolytes having the formula LiInBr_4 and Li_3InBr_6 were prepared and their structures and conduction mechanisms were investigated on the basis of high resolution X-ray diffraction and solid state NMR.Both of these structures could be regarded as a rock salt type in which three Li^+ is replaced by one In^<3+> and two vacancies. Although cubic LiInBr_4 belongs to a defect spinel structure, its structure can be regarded as a defect rock salt type because tetrahedral site is empty. Since the positional disorder of In^<3+> was commonly observed at the superionic state, this disorder plays an important role for the Li^+ conduction. Furthermore, a continuous solid solution Li_<1-x>,In_<x/3>Br, between LiBr and InBr_3 was suggested at least below x<0.2.

离子导电性是材料的功能性质之一。高离子电导率新材料的制备是燃料电池或二次电池发展的关键技术。本研究制备了LiInBr_4和Li_3InBr_6固体电解质，并利用高分辨X射线衍射和固体核磁共振研究了它们的结构和导电机理，这两种结构都可以看作是三个Li^+被一个In^<3+>和两个空位取代的岩盐型结构。立方LiInBr_4虽然属于缺陷尖晶石型结构，但由于四面体位是空的，因此可将其视为缺陷岩盐型结构。由于In^<3+>的位置无序在超离子态下普遍存在，因此这种无序对Li^+的导电起着重要的作用。在<1-x>x&lt;0.2时，LiBr和InBr_3之间存在连续固溶体Li_，In_x/3Br。

项目成果

Superionic solid solution between CsHSO_4 and CsH_2PO_4

CsHSO_4 和 CsH_2PO_4 之间的超离子固溶体

• 发表时间: 2008
• 期刊: Solid State Ionics 179
• 作者: Y.;Habata;Y. Yamane
• 通讯作者: Y. Yamane

Ion dynamics and structure-dependent conductivity scaling properties in polycrystalline LiK_<1-x>Rb_xSO_4

多晶 LiK_<1-x>Rb_xSO_4 中的离子动力学和结构相关的电导率缩放特性

• 发表时间: 2007
• 期刊: J.Phys.Chem.Solids 68
• 作者: M.;M.;Ahmad;M. M. Ahmad;M. M. Ahmad;Mohamad M.Ahmad
• 通讯作者: Mohamad M.Ahmad

Lithium superionic conductors Li3InBr6 and LiInBr4 studied by 7Li, 115In NMR

• DOI: 10.1016/j.ssi.2006.06.026
• 发表时间: 2006-10
• 期刊: Solid State Ionics
• 影响因子: 3.2
• 作者: Koji Yamada;Keiji Kumano;T. Okuda

Aging-induced dielectric relaxation in barium titanate ceramics

• DOI: 10.1063/1.2713178
• 发表时间: 2007-03
• 期刊: Applied Physics Letters
• 影响因子: 4
• 作者: M. M. Ahmad-M.;Koji Yamada;P. Meuffels;R. Waser

Superionic PbSnF_4 : A giant dielectric constant material

超离子PbSnF_4：一种巨介电常数材料

• 发表时间: 2007
• 期刊: Apply. Phys. Lett 91
• 作者: M.;M.;Ahmad
• 通讯作者: Ahmad