Ultrafast and Ultralarge Lithium‐Ion Storage Enabled by Fluorine‐Nitrogen Co‐Implanted Carbon Tubes

作者：Qing Hou, Ajuan Hu, Hongbin Ni, Zongqiang Sun, Jianing Duan, Xiaoming Xu, Jingmin Fan, Ruming Yuan, Mingsen Zheng, Quanfeng Dong · 发表于：Small · 年份：2023 · DOI：10.1002/smll.202300663 · 被引用次数：8 · 研究领域：Advancements in Battery Materials、Supercapacitor Materials and Fabrication、Advanced Battery Materials and Technologies

Abstract As a holy grail in electrochemistry, both high‐power and high‐energy electrochemical energy storage system (EES) has always been a pursued dream. To simultaneously achieve the “both‐high” EES, a rational design of structure and composition for storage materials with characteristics of battery‐type and capacitor‐type storage is crucial. Herein, fluorine‐nitrogen co‐implanted carbon tubes (FNCT) have been designed, in which plentiful active sites and expanded interlayer space have been created benefiting from the heteroatom engineering and the fluorine‐nitrogen synergistic effect, thus the above two‐type storage mechanism can get an optimal balance in the FNCT. The implanted fluorine heteroatoms can not only amplify interlayer spacing, but also induce the transformation of nitrogen configuration from pyrrole nitrogen to pyridine nitrogen, further promoting the activity of the carbon matrix. The extraordinary electrochemical performance as results can be witnessed for FNCT, which exhibit fast lithium‐ion storage capability with a high energy density of 119.4 Wh kg −1 at an ultrahigh power density of 107.5 kW kg −1 .