Bioinspired Highly Crumpled Porous Carbons with Multidirectional Porosity for High Rate Performance Electrochemical Supercapacitors,ACS Sustainable Chemistry & Engineering

当前位置： X-MOL 学术 › ACS Sustain. Chem. Eng. › 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.)

Bioinspired Highly Crumpled Porous Carbons with Multidirectional Porosity for High Rate Performance Electrochemical Supercapacitors
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-09-09 00:00:00 , DOI: 10.1021/acssuschemeng.8b01839
Lin Peng ₁ , Yijin Cai ₁ , Ying Luo ₁ , Gang Yuan ₁ , Jianyu Huang ₁ , Chaofan Hu ₁ , Hanwu Dong ₁ , Yong Xiao ₂ , Yeru Liang ₁ , Yingliang Liu _{1,

2} , Mingtao Zheng _{1,

2}

Affiliation

Rational design and facile synthesis of porous carbon materials with optimized porosity are necessary to boost electrochemical performance for energy storage and conversion devices. In this work, we report the fabrication of three-dimensional (3D) highly crumpled porous carbons (HCPCs) inspired by the crumpled structure and functionality of renewable Moringa oleifera leaves by a facile postactivation-free method. The as-resulted HCPCs deliver an interconnected framework, abundant active interfaces, rich heteroatom content, and notably multidirectional porosity for fast ion transport and efficient charge storage. Employed as electrode materials for supercapacitors, the HCPCs exhibit ultrahigh rate capability of capacitance retention over 90% when increasing the current density from 1.0 to 50 A g^–1 as well as outstanding cycling stability over 20 000 charge/discharge cycles. Furthermore, the HCPC-based symmetric supercapacitor manifests a high specific energy of 21.6 Wh kg^–1, along with excellent structural and electrochemical stability after 20 000 cycles in aqueous medium. This work provides an appealing model of carbon material engineering inspired by the unique structure of natural leaves for fast and high-rate supercapacitors, as well as guidance for rational structural design in extended energy storage and conversion systems.

中文翻译：

生物启发的具有多方向孔隙度的高度皱缩多孔碳，用于高速率性能电化学超级电容器

合理设计和轻松合成具有最佳孔隙率的多孔碳材料对于提高储能和转换装置的电化学性能是必不可少的。在这项工作中，我们报告了一种通过简便的免后活化方法制造的可再生辣木叶片的皱缩结构和功能性启发而制作的三维（3D）高皱度多孔碳（HCPC）。最终的HCPC提供了一个相互连接的框架，丰富的活性界面，丰富的杂原子含量，尤其是多方向的孔隙度，可实现快速的离子传输和有效的电荷存储。HCPC被用作超级电容器的电极材料，当将电流密度从1.0 A增加到50 A g ^–1时，具有超高的电容保持率，超过90％。以及超过20000次充电/放电循环的出色循环稳定性。此外，基于HCPC的对称超级电容器在水介质中经过20 000次循环后，具有21.6 Wh kg ^–1的高比能，以及出色的结构和电化学稳定性。这项工作提供了一种吸引人的碳材料工程模型，其灵感来自于快速和高倍率超级电容器的天然叶片独特结构，并为扩展储能和转换系统中的合理结构设计提供了指导。

更新日期：2018-09-09

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