Electron transport shuttle mechanism via an Fe–N–C bond derived from a conjugated microporous polymer for a supercapacitor†,Dalton Transactions

当前位置： X-MOL 学术 › Dalton Trans. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Electron transport shuttle mechanism via an Fe–N–C bond derived from a conjugated microporous polymer for a supercapacitor†
Dalton Transactions ( IF 3.5 ) Pub Date : 2017-12-04 00:00:00 , DOI: 10.1039/c7dt04094f
Alan Christian Lim _{1,

2,

3,

4,

5} , Harsharaj S. Jadhav _{1,

2,

3,

4,

5} , Jeong Gil Seo _{1,

2,

3,

4,

5}

Affiliation

A new innovative electrode material (Fe-P800) consisting of a metal complex anchored on carbon via the utilization of iron-porphyrin conjugated microporous polymer (Fe-CMP) was prepared after pyrolyzing at 800 °C. The usage of the polymer with iron-porphyrin repeating units maximized the possible formation of Fe–N_x coordination within the bulk of the sample while the thermal treatment rendered the carbon framework to form a distinct arrangement between metal, nitrogen and carbon with a high surface area of 450 m² g⁻¹. The formation of the M–N–C bond, confirmed through XPS analysis, established a direct interaction between metal and carbon material. Thus, an indisputable synergistic effect was observed leading to a high capacitance of 182 F g⁻¹ at a current density of 1 A g⁻¹ despite its low metal loading of ∼1%. It also exhibited a highly robust cycling stability of ∼100% capacitance retention even after 5000 cycles (10 A g⁻¹). In this study, a new mechanism was proposed wherein the metal (iron) center features an electron access point via its highly reversible redox reactivity, providing a shuttle effect for charge transfer to the conductive graphitic carbon matrix.

中文翻译：

电子传输梭机构通过从超级电容器的共轭微孔聚合物衍生的Fe-N-C键†

在800°C的温度下热解后，制备了一种新的创新电极材料（Fe-P800），该材料由利用铁-卟啉共轭微孔聚合物（Fe-CMP）固定在碳上的金属络合物组成。带有铁-卟啉重复单元的聚合物的使用可最大程度地在样品主体中形成Fe–N _x配位，同时热处理使碳骨架在高表面的金属，氮和碳之间形成独特的排列面积450 m ² g ^-1。XPS分析证实了M–N–C键的形成，建立了金属与碳材料之间的直接相互作用。因此，观察到了无可争议的协同效应，尽管金属负载量约为1％，但在1 A g ^-1的电流密度下却产生了182 F g ^-1的高电容。即使在5000次循环（10 A g ^-1）之后，它也表现出〜100％的电容保持率的高度鲁棒的循环稳定性。在这项研究中，提出了一种新的机制，其中金属（铁）中心通过其高度可逆的氧化还原反应性而具有电子接入点，从而为电荷转移到导电石墨碳基质提供了穿梭效应。

更新日期：2017-12-04

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11