Design of Tree-Dimensional Fields for Electrochemical Reactions in Polymeric Electrolytes Having Specific Micro Structures

具有特定微观结构的聚合物电解质中电化学反应的三维场设计

基本信息

批准号：
11650846
负责人：
MORITA Masayuki
金额：
$ 2.24万
依托单位：
Yamaguchi University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

项目摘要

Polymeric electrolytes containing lithium salts and/or multi-valent cation salts such as rare earth or magnesium salts have been prepared. The relation among the chemical composition, the ionic structure and the electrochemical reaction processes of the polymeric electrolytes was investigated to design advanced electrochemical devices such as batteries and capacitors. The results are summarized as follows.1. Analyses of Redox Reaction Processes in the Polymeric Electrolytes Containing Different Valences of Cations-Ionic structure of Li^+, Mg^<2+> and Ln^<3+> (Ln : rare earth metals) in polymer electrolytes have been analyzed by spectroscopic and electrochemical methods. The most important finding was that the co-existence of cations with different valences leads to unique conductance behavior of the present polymeric electrolyte system.2. Addition Effects of Ceramics Filler on the Electrochemical Characteristics of the Polymeric Electrolyte-The addition of a small amount of ceramics filler increased the ionic conductivity of the polymeric electrolyte system containing LiClO_4 as the salt. The mechanism of the improved ionic mobility of Li^+ in the solid phase was proposed.3. Effects of the Ionic Structure on the Redox Processes of Transition-Metal Complex Oxides in Non-Aqueous Media-Effects of the electrolyte composition (solvent and salt) on the redox processes of transition-metal complex oxides were investigated to apply the processes to a high energy density rechargeable battery system. The electrolyte composition significantly affected the charge transfer process at the solid/solution interface.

已经制备了包含锂盐和/或多价阳离子盐例如稀土盐或镁盐的聚合物电解质。研究聚合物电解质的化学组成、离子结构和电化学反应过程之间的关系，以设计先进的电化学装置，如电池和电容器。研究结果如下： 1．不同价态阳离子聚合物电解质中氧化还原反应过程的分析——用光谱法分析了聚合物电解质中Li^+、Mg^<2+>和Ln^<3+>（Ln：稀土金属）的离子结构和电化学方法。最重要的发现是不同价态阳离子的共存导致了聚合物电解质体系独特的电导行为。 2．陶瓷填料的添加对聚合物电解质电化学特性的影响——少量陶瓷填料的添加提高了以LiClO_4为盐的聚合物电解质体系的离子电导率。提出了提高固相Li^+离子迁移率的机理。 3．非水介质中离子结构对过渡金属复合氧化物氧化还原过程的影响-研究了电解质组成（溶剂和盐）对过渡金属复合氧化物氧化还原过程的影响，以将该过程应用于高能量密度可充电电池系统。电解质组成显着影响固/溶液界面的电荷转移过程。