Hierarchical tunnel design for rapid transport of ion in solid state materials

固态材料中离子快速传输的分层隧道设计

• 批准号: 17360464
• 负责人: YAO Takeshi
• 金额: $ 9.54万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17360464/
• 关键词: Solid state electrochemistry; Ionic conductivity; Lithium ion battery; Vanadium cobalt oxide; Intercalation; Fuel cell; Mixed conductor; X-ray absorption fine structure; 固体電解質

1. We established the solid state method for synthesis of vanadium cobalt oxide, CoV_3O_8, which has tunnels for one dimensional ionic transport. It was examined as electrode material for lithium ion battery. The electrochemical reaction of CoV_3O_8 with lithium was found to proceed as follows. First lithium intercalated in CoV_3O_8. Second an amorphous substance was generated. Finally a crystalline substance, whose XRD peaks can be indexed on the basis of a face centered cubic cell, was generated. On the other hand, charge can be done. Therefore, discharge-charge cycles were possible. In particular, high coulombic efficiency near unity in the second cycle or later was observed. Measurement and analysis of open circuit potentials at various lithium insertion levels indicated that such reversible discharge-charge was due to lithium insertion in the amorphous substance and extraction out of that.2. Hexagonal tungsten trioxide (h-WO_3), which has tunnels in its structure, is a metastable … More phase of WO_3. The tunnel accommodates various kinds of ions and provides them transport path. Amorphous peroxopolytungstic acid (PPTA), which is one of solid state acids, is a significant precursor of hexagonal tungsten trioxide. We analyzed structure of this material using X-ray absorption measurements. As a result, we acquired knowledge concerning correlation of polyhedral variation with temperatures of thermal treatment. For instance, corner shared polyhedra became dominant, compared to edge shared ones with increase in temperature. The polymerization of the polyhedra and change in coordination number of W-O were clarified. Furthermore, the evolution of structural change from PPTA to h-WO_3 was observed.3. Ba_2In_2O_5 is known to have oxygen vacancy in high concentration, which allows oxide ionic conduction. We synthesized various Ba_2In_2O_5-derivative oxides and studied their properties. BaIn_<1-x>M_xO_<3-δ> (M = Fe and Co) was found to be a good electronic and oxide ionic conductor. A single chamber fuel cells using high oxide ionic conductor BaLaInO_<5.5> were constructed. The relationship between fuel supply conditions and performance of the cell was studied in detail. Less

1.建立了固相合成钒钴氧化物CoV_3O_8的方法，该方法具有一维离子输运通道。对其作为锂离子电池电极材料进行了研究。CoV_3O_8与锂的电化学反应过程如下。首先在CoV_3O_8中嵌入锂，然后生成非晶态物质。最后，生成了一种晶态物质，其X射线衍射峰可以基于面心立方晶胞进行索引。另一方面，充电是可以做到的。因此，放电-充电循环是可能的。特别是，在第二个循环或之后的循环中，观察到接近1的高库仑效率。在不同锂插入水平下的开路电位测量和分析表明，这种可逆放电-充电是由于锂在非晶态物质中的插入和提取所致。六方三氧化钨(h-WO_3)是一种亚稳态…，其结构具有隧道结构更多的WO_3相。隧道容纳了各种离子，并为它们提供了传输途径。无定形过氧多钨酸(PPTA)是一种重要的六方氧化钨前驱体，是固体酸的一种。我们用X射线吸收测量分析了这种材料的结构。因此，我们获得了多面体变化与热处理温度之间的关联知识。例如，随着温度的升高，角共享多面体成为主导，而边共享多面体占主导地位。阐明了多面体的聚合和W-O配位数的变化。此外，还观察到了从PPTA到h-WO_3的结构变化。已知的Ba2In2O5在高浓度下存在氧空位，从而允许氧化物离子传导。我们合成了各种Ba2In2O5-衍生物氧化物，并研究了它们的性质。3-δ&gt；(M=Fe和Co)是一种良好的电子和氧化物离子导体。用高氧离子导体BaLaInO&lt；5.5&gt；制作了单室燃料电池。详细研究了燃料供应条件与电池性能的关系。较少

项目成果

Improvement of Cycle Life of Spinel Type of Lithium Manganese Oxide by Addition of Other Spinel Compounds

添加其他尖晶石化合物提高尖晶石型锂锰氧化物的循环寿命

• 发表时间: 2006
• 期刊: Solid State Ionics 177
• 作者: Mitsuhiro Hibino;Masayuki Nakamura;Yuji Kamitaka;Naoshi Ozawa;Takeshi Yao
• 通讯作者: Takeshi Yao

欠陥ペロブスカイト型電解質を用いた-室式燃料電池の開発

使用有缺陷的钙钛矿电解质开发室式燃料电池

• 发表时间: 2006
• 期刊: 新エネルギー最前線-環境調和型エネルギシステムの構築を目指して-(化学フロンティア17、化学同人) 17
• 作者: 日比野光宏;八尾健
• 通讯作者: 八尾健

Improvement of cycle life of spinel type of lithium manganese oxide by addition of other spinel compounds during synthesis

• DOI: 10.1016/j.ssi.2006.03.024
• 发表时间: 2006-10
• 期刊: Solid State Ionics
• 影响因子: 3.2
• 作者: M. Hibino;Masayuki Nakamura;Yuji Kamitaka;Naoshi Ozawa;T. Yao

Single Chamber Solid Oxide Fuel Cell using BaLaIn205.5 Solid Electrolyte

使用BaLaIn205.5固体电解质的单室固体氧化物燃料电池

• 发表时间: 2005
• 期刊: Electrochemical and solid state letters 8(9)
• 作者: Mitsuhiro Hibino;Masayuki Nakamura;Yuji Kamitaka;Naoshi Ozawa;Takeshi Yao;Mitsuhiro Hibino;Teruaki Kobayashi;Seiichi Asahara
• 通讯作者: Seiichi Asahara

Electric Property of Mixed Conductor BaIn_<1-x>Co_xO_<3-δ>

混合导体BaIn_<1-x>Co_xO_<3-δ>的电学性质

• 发表时间: 2006
• 期刊: Solid State Ionics 177・19-25
• 作者: Teruaki Kobayashi;Yasuaki Senoo;Mitsuhiro Hibino;Takeshi Tao
• 通讯作者: Takeshi Tao