Development of Thermostable Polymer Battery with Large Capacity

为了提高聚吡咯（PPy）导电性能的热稳定性，采用-COGH、-OH、SO_3H等具有酸型取代基的芳香磺酸盐衍生物作为掺杂剂。掺有这些掺杂剂的聚吡啶在空气中，即使在150℃的温度下，其电导率也表现出良好的热稳定性。其中，2-羟基-5-磺基苯甲酸的热稳定性最高。掺杂的聚吡啶在空气中以150*的温度加热8 h后仍能保持95%的初始电导率，并且在125*的温度下长期加热1000 h的稳定性是掺杂聚吡啶对甲基苯甲酸的20倍。热稳定机制表明，具有酸性取代基的掺杂剂可以抑制质子从PPy的n位解离，并通过提供来自酸性基团的质子来保持p共轭结构。氘化聚吡啶的红外光谱证实了这种质子补充。他们的PPys适用于电池和电容器的电极材料。采用掺有抗氧化掺杂剂的聚吡啶（PPy）电容器，在空气高温环境下具有较高的长期可靠性和良好的高频性能。

In order to improve the thermal stability of the electronic conductivity of polypyrrole(PPy), a series of aromatic sulfonate derivatives having acid-type substitute groups, such as -COGH, -OH, and SO_3H, were used as a dopants. The PPy doped with these dopants showed excellent thermal stability of their electric conductivity, even at 150ﾟC in air. Especially, 2-hydroxy-5-sulfobezoic acid provided the highest thermal stability. The doped PPy maintained 95 % of its initial conductivity even after heating for 8 h at 150*in air and showed 20-times higher stability against long-term heating at 125*for 1000 h in comparison with PPy doped p-methylbenzoic acid.The thermal stabilization mechanism has suggested hat dopants having acidic substituents should suppress proton dissociation from the N-position of the PPy and keep the p-conjugation structure by supplying a proton from acidic groups. Such a proton supplement was confirmed by the IR spectroscopy of deuterized PPy.Their PPys were applicable to use an electrode material of battery and capacitor. The capacitor using PPy doped the antioxidative dopant provides high reliability under high temperature in air for long-term with good high frequency properties.