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. 建立了具有一维离子传输通道的钒钴氧化物CoV_3O_8的固态合成方法。对其作为锂离子电池电极材料进行了试验研究。CoV_3O_8与锂的电化学反应如下：CoV_3O_8中首次嵌入锂。第二，生成无定形物质。最后生成了一种晶状物质，其XRD峰可以根据面心立方胞进行索引。另一方面，充电是可以做到的。因此，充放电循环是可能的。特别是在第二循环或之后，观察到接近统一的高库仑效率。对不同锂插入水平下的开路电位进行测量和分析表明，这种可逆的充放电是由于锂在非晶物质中插入并从中提取所致。六方三氧化钨（h-WO_3）是WO_3的亚稳相，具有隧道状结构。隧道可容纳多种离子，并为其提供输运通道。无定形过氧多钨酸（PPTA）是一种固态酸，是六方三氧化钨的重要前驱体。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的关系的知识。例如，与边缘共享多面体相比，角共享多面体随着温度的升高而成为主导。澄清了多面体的聚合和W-O配位数的变化。此外，还观察了PPTA到h-WO_3的结构变化过程。已知Ba_2In_2O_5在高浓度时具有氧空位，使氧化物离子导电。合成了多种ba_2in_2o_5衍生物氧化物，并对其性能进行了研究。BaIn_<1-x>M_xO_<3-δ> （M = Fe和Co）是一种良好的电子和氧化物离子导体。采用高氧化离子导体BaLaInO_<5.5>制备了单室燃料电池。详细研究了燃料供应条件与电池性能的关系。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