Scalable Polymerization Approach to Tailoring Morphologies of Polyimide‐Derived N‐Doped Carbons for High‐Performance Supercapacitors,Energy Technology

当前位置： X-MOL 学术 › Energy Technol. › 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.)

Scalable Polymerization Approach to Tailoring Morphologies of Polyimide‐Derived N‐Doped Carbons for High‐Performance Supercapacitors
Energy Technology ( IF 3.6 ) Pub Date : 2019-09-30 , DOI: 10.1002/ente.201901013
Xufei Liu ₁ , Peng Mei ₂ , Sheng Lei ₁ , Xiaofang Zhang _{1,

2} , Qian Liu ₁ , Yingkui Yang _{1,

2}

Affiliation

3D N‐doped carbon nanobelt (NCB) networks are fabricated by one‐pot hydrothermal polycondensation of co‐monomer salts of dianhydride and diamine followed by carbonization of the resulting nanobelt‐like polyimides. As control samples, solvothermally polymerized petal‐like polyimides and conventionally polymerized spindle‐like polyimides are also produced, which further yields N‐doped carbon petals and N‐doped carbon spindles after identical carbonization, respectively. Interestingly, all N‐doped carbons copy the morphologies of their polyimide precursors well. Specially, the 800°C‐treated NCB exhibits a robust 3D architecture composed of intertwined nanobelt networks with high N‐doping levels and electroactivity‐enriched N configurations. Remarkably, the symmetric supercapacitor assembled by such NCB electrodes delivers large specific capacitance (193 F g⁻¹ at 1 A g⁻¹), high rate capability (176 F g⁻¹ at 20 A g⁻¹), and long cycling stability (nearly 100% retention over 10,000 cycles at 20 A g⁻¹). The energy density is as high as 27 Wh Kg⁻¹ at the power density of 500 W Kg⁻¹, and retains 24 Wh Kg⁻¹ at the power density up to 20,000 W Kg⁻¹. This work opens up an affordable and scalable approach to the rational fabrication of heteroatom‐contained carbon materials for high‐performance supercapacitors with well‐balanced power and energy output.

中文翻译：

可扩展聚合方法，用于定制高性能超级电容器用聚酰亚胺衍生的N掺杂碳的形态

3D N掺杂碳纳米带（NCB）网络是通过将二酐和二胺的共聚单体盐进行一锅水热缩聚，然后将所得的纳米带状聚酰亚胺碳化而制得的。作为对照样品，还生产了溶剂热聚合的花瓣状聚酰亚胺和常规聚合的纺锤状聚酰亚胺，在相同的碳化作用下，分别进一步产生了N掺杂的碳花瓣和N掺杂的碳锭。有趣的是，所有的N掺杂碳都很好地复制了其聚酰亚胺前体的形态。特别是，经800°C处理的NCB具有坚固的3D架构，该架构由缠结的纳米带网络组成，这些网络具有高N掺杂水平和丰富的电活性N配置。值得注意的是^-1 1个A G ^-1），高倍率性能（176 F G ^-1在20 A G ^-1在20 A G），和长循环稳定性（接近100％的保留超过10,000次循环^-1）。能量密度高达27瓦时千克^-1在500瓦公斤的功率密度^-1，并保持24瓦时千克^-1处的功率密度高达20000W¯¯千克^-1。这项工作为合理制造功率和能量输出均衡的高性能超级电容器提供了一种合理可行的，可扩展的方法，以合理制造含杂原子的碳材料。

更新日期：2019-09-30

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11