隧道骨架锡双氧化物的合成及电学性能-猫眼课题宝

隧道骨架锡双氧化物的合成及电学性能

批准号：

10450237

负责人：

ENDO Tadashi

金额：

$10.11万

依托单位：

Tohoku University

依托单位国家：

日本

项目类别：

Grant-in-Aid for Scientific Research (B).

财政年份：

1998

资助国家：

日本

项目状态：

已结题

起止时间：

1998 至 2000

来源：

https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10450237/

关键词：

Ion conductor Tin double oxide Tin oxide Microporous materials Hollandite Tunnel structure Layered structure Crystal growth 針状結晶カリウムフラックススズトンネル型構造ホーランダイト型構造層状化合物イオン伝導体スズ複酸化物インターカレーション反応ホーランダイト型化合物

中文摘要

翻译

首先，我们制备了具有开放骨架的新型锡双氧化物。C.Keller和A. R. West报道了具有斜方晶系结构的Li_2MgSn_3O_8。（J.Mater. Sci.信件：2（1983）451-452）Li_2MgSn_3O_8的骨架由SnO_6和MgO_6构成，Li^+离子位于1×2隧道中。我们尝试用大的碱金属离子K^+、Rb^+或Cs^+代替Li^+来合成具有更大孔道的新型锡双氧化物，例如2×2或3×3孔道。结果表明，我们成功地制备了具有钙钛矿结构的A_xMg_x/2>Sn_（8-x/2）O_（xO<16>_2）（K，Rb，Cs）和K_xCa_x/2> Sn_（8-x/<16>2）O_（xO<16>_（<16>xO_2）），这两种化合物都具有良好的离子和电子导电性。为了研究这两种化合物的电学性质，我们研究了它们晶体的助熔剂生长。用过量的K_2CO_3作助熔剂，得到了K_xCa_（x/2）Sn_（8-x/2）O_<16>（x ≤ 2）多晶。多晶是将K_xCa_（x/2）Sn_（8-x/2）O_（x/2）纤维状单晶捆扎<16>成束而成。K_xCa_x/2>Sn_8-x/2>O_<16>（x/2）的电导率为<300>2.2×10^<-9>Ω^<-1>m^<-1>，活化能为0.63 eV，表明一维通道中的主要载流子为钾离子，因此，新型的钙钛矿型锡双氧化物A_xMg_x/2>Sn_8-x/2>O_<16>（K，Rb，Cs）和K_xCa_x/2> Sn_8-x/2> O_<16>（x/2）有望在电解质中得到应用，特别是在电解质中

英文摘要

First, we have prepared new tin double oxides with open framework. C.Keller and A.R.West had reported Li_2MgSn_3O_8 with a ramsdellite structure. (J.Mater. Sci. Lett., 2 (1983) 451-452) The framework of Li_2MgSn_3O_8 is constructed by SnO_6 and MgO_6 Li^+ ions are located in 1×2 tunnel. We have tried to synthesize new tin double oxides with larger tunnels, for example 2×2 or 3×3, by using lager alkali ions, K^+, Rb^+, or Cs^+ instead of Li^+ ion. As a restult, we succeeded in preparing A_xMg_<x/2>Sn_<8-x/2>O_<16> (x≦2)(K, Rb and Cs) and K_xCa_<x/2>Sn_<8-x/2>O_<16> (x≦2) with a hollandite structure.Both A_xMg_<x/2>Sn_<8-x/2>O_<16> (x≦2)(K, Rb and Cs) and K_xCa_<x/2>Sn_<8-x/2>O_<16> (x≦2) were expected that they would have excellent ion and electron conductivities. In order to investigate electrical properties of both compounds, we have studied the flux growth of their crystals. Polycrystalline K_xCa_<x/2>Sn_<8-x/2>O_<16> (x≦2) was obtained by using excess K_2CO_3 as flux. The polycrystal was made by tying fibrous single crystals of K_xCa_<x/2>Sn_<8-x/2>O_<16> (x≦2) in a bundle. Its size (mm_3) was 1.5 mm×0.2 mm×0.2 mm. After conductivity measurement, the conductivity of K_xCa_<x/2>Sn_<8-x/2>O_<16> (x≦2) was σ_<300>=2.2×10^<-9>Ω^<-1> m^<-1> at room temperature, and the activation energy was calculated to be 0.63eV.The result suggested that the chief charge carrier is potassium ion in 1D channels.In conclusion, it is expected that both new hollandite tin double oxides, A_xMg_<x/2>Sn_<8-x/2>O_<16> (K, Rb, and Cs) and K_xCa_<x/2>Sn_<8-x/2>O_<16> (x≦2) will be applied to electrolytes, especially to

期刊论文(32)

专著(0)

科研奖励(0)

会议论文