Di-ureasil ormolytes doped with Mg2+ ions.: Part 1:: Morphological, thermal and electrochemical properties

被引：35

作者：

Nunes, SC

Bermudez, VDZ ^{[1
]}

Silva, MM

Barros, S

Smith, MJ

Morales, E

Carlos, LD

Rocha, J

机构：

[1] Univ Tras Os Montes & Alto Douro, Dept Quim, P-5000911 Vila Real, Portugal

[2] Univ Tras Os Montes & Alto Douro, CQVR, P-5000911 Vila Real, Portugal

[3] Univ Minho, Dept Quim, P-4710057 Braga, Portugal

[4] CSIC, Inst Ciencia & Tecnol Polimeros, E-28006 Madrid, Spain

[5] Univ Aveiro, Dept Fis, P-3810193 Aveiro, Portugal

[6] Univ Aveiro, CICECO, P-3810193 Aveiro, Portugal

[7] Univ Aveiro, Dept Quim, P-3810193 Aveiro, Portugal

来源：

SOLID STATE IONICS | 2005年 / 176卷 / 17-18期

关键词：

sol-gel; di-ureasil; magnesium triflate; complex impedance; cyclic voltammetry;

D O I：

10.1016/j.ssi.2005.04.013

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Poly(oxyethylene) (POE)/siloxane-based materials incorporating magnesium triflate (Mg(CF3SO3)(2)) were synthesized by the sol-gel process. The host Class II hybrid matrix (di-ureasil) employed is composed of a siliceous framework to which short POE chains are covalently bonded through urea linkages. Ormolytes with salt composition it (molar ratio of oxyethylene moieties per Mg2+ ion) ranging from infinity to 1 were investigated. The nanohybrid with n = 20, which is thermally stable up to 360 degrees C, exhibits the highest conductivity (e.g., approximately 4.0 x 10(-6) and 6.7 x 10(-5) S cm(-1) at 35 and 104 degrees C, respectively). The redox stability domain of this material spans from -3.0 to +2.0 V vs. Mg/Mg2+. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：1591 / 1599

页数：9

共 47 条

[1] Synthesis and characterization of polymeric electrolytes for solid state magnesium batteries [J].