Activation Barriers Provide Insight into the Mechanism of Self-Discharge in Polypyrrole
Activation Barriers Provide Insight into the Mechanism of Self-Discharge in Polypyrrole
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DOI：
10.1021/jp510690p
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发表时间：
2014-12-25
影响因子：
3.7
通讯作者：
Sjodin, Martin
中科院分区：
文献类型：
--
作者：
Olsson, Henrik;Stromme, Maria;Sjodin, Martin
导电聚合物被设想在基于有机物的电能转换和存储系统的开发中发挥重要作用。然而，导电聚合物的成功利用依赖于对其固有的可能性和局限性的基本理解。在这份报告中，我们研究了聚吡咯的自放电的温度依赖性，并表明，自放电的速率是动力学控制的聚合物固有的吸能电子转移反应形成一个反应性中间体。我们进一步表明，这种中间体是密切相关的过程称为过氧化。该过程对于大多数（如果不是全部的话）p掺杂的导电聚合物是通用的，而与介质无关。因此，本文的结果预计将显着影响未来的能量存储系统与导电聚合物基组件的发展。
Conducting polymers are envisioned to play a significant role in the development of organic matter based electrical energy conversion and storage systems. However, successful utilization of conducting polymers relies on a fundamental understanding of their inherent possibilities and limitations. In this report we studied the temperature dependence of the self-discharge in polypyrrole and show that the rate of self-discharge is kinetically controlled by a polymer intrinsic endergonic electron transfer reaction forming a reactive intermediate. We further show that this intermediate is intimately linked to a process known as overoxidation. This process is general for most, if not all, p-doped conducting polymers irrespective of medium. The results herein are therefore expected to significantly impact the development of future energy storage systems with conducting polymer based components.