Application of Conducting Polymers Having Unusual Doping Properties for Energy Conversion

具有异常掺杂特性的导电聚合物在能量转换中的应用

基本信息

批准号：
11650845
负责人：
KITANI Akira
金额：
$ 2.18万
依托单位：
Hiroshima 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

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650845/
关键词：
Conducting polymer n-Type doping Self-doping Secondary battery Fuel cell 導電性稿分子

项目摘要

In the present study, following three types of polymer electrodes were prepared electrochemically to develop new conductive polymer electrodes having unusual doping properties for energy conversion. These electrodes are applicable to secondary batteries and direct methanol fuel cells.1. Properties of polyanilines having oxyethylene units (negative electrode of secondary battery) Electrochemical behaviors and properties of poly-(N-3, 6, 9-trioxadecyl)-aniline (poly-NTDAn) were also studied and compared with those of Poly-N-(3, 6-dioxaheptyl) aniline . The reversibility of electrochemical n-type doping-undoping reaction was much improved for poly-NTDAn, which has three oxyethylene units at N position. The molecular weight of poly-NTDAn was high (1,100,000), and the conductivity value was 0.9 mS/cm.2. Properties of self-doped polyaniline composites (positive electrode of secondary battery) Electroactive poly-aniline-2, 5-disulfonic acid (poly-ADSA) was used as a bulky dopant of polyaniline (PAn) to develop highly electroactive polymer electrodes. PAn/poly-ADSA composite was prepared by dopant exchange. The redox charge of resulting composite increased up to 120% of the value of untreated PAn by the electrochemical doping of electroactive poly-ADSA.The specific capacity was determined to be 98 Ah/kg, which is comparable to that of PAn.3. Properties of Pt/polyaniline composite electrodes (negative electrode of fuel cell) Electrocatalytic oxidation of methanol on Pt modified polyaniline electrodes was investigated to develop highly active composite electrodes for direct methanol fuel cells. Pt/polyaniline modified carbon electrodes showed higher catalytic activity towards oxidation of methanol than Pt deposited carbon electrodes. The effect of kind of protonic acids used in the electrochemical preparation of polyaniline on the oxidation current of methanol was studied. Largest oxidation current was obtained for polyanilines prepared in sulfuric acid solutions.

在本研究中，通过电化学方法制备了以下三种类型的聚合物电极，以开发具有异常掺杂特性的新型导电聚合物电极，用于能量转换。这些电极适用于二次电池和直接甲醇燃料电池。1．具有氧乙烯单元的聚苯胺（二次电池负极）的性能还研究了聚（N-3,6,9-三氧杂癸基）-苯胺（聚-NTDAn）的电化学行为和性能，并与聚-N-进行了比较。 (3, 6-二氧杂庚基)苯胺。 N位具有三个氧乙烯单元的聚NTDAn大大提高了电化学n型掺杂-去掺杂反应的可逆性。聚NTDAn的分子量较高(1,100,000)，电导率为0.9 mS/cm.2。自掺杂聚苯胺复合材料（二次电池正极）的性能电活性聚苯胺-2,5-二磺酸（poly-ADSA）被用作聚苯胺（PAn）的大体积掺杂剂，以开发高电活性聚合物电极。通过掺杂剂交换制备PAn/聚ADSA复合材料。通过电活性聚ADSA的电化学掺杂，所得复合材料的氧化还原电荷增加至未处理的PAn值的120%。确定比容量为98 Ah/kg，与PAn.3的比容量相当。 Pt/聚苯胺复合电极（燃料电池负极）的性能研究了Pt修饰聚苯胺电极上甲醇的电催化氧化，以开发用于直接甲醇燃料电池的高活性复合电极。 Pt/聚苯胺改性碳电极比 Pt 沉积碳电极对甲醇氧化表现出更高的催化活性。研究了电化学制备聚苯胺时所用质子酸种类对甲醇氧化电流的影响。在硫酸溶液中制备的聚苯胺获得了最大的氧化电流。