High Conductive Two-Dimensional Covalent Organic Framework for Lithium Storage with Large Capacity

作者：Hui Yang, Shengliang Zhang, Li-Heng Han, Zhou Zhang, Zheng Xue, Juan Gao, Yongjun Li, Changshui Huang, Yuanping Yi, Huibiao Liu, Yuliang Li · 发表于：ACS Applied Materials & Interfaces · 年份：2016 · DOI：10.1021/acsami.5b12370 · 被引用次数：309 · 研究领域：Covalent Organic Framework Applications、Advancements in Battery Materials、Advanced Battery Materials and Technologies

A high conductive 2D COF polyporphyrin (TThPP) linked by 4-thiophenephenyl groups was synthesized through an in situ chemical oxidative polymerization on the surface of copper foil. The TThPP films were used as the anode of lithium-ion battery, which exhibited high specific capacities, excellent rate performances, and long cycle lives due to the alignment of 2D polyporphyrin nanosheets, and they (i) can highly efficiently adsorb Li atoms, (ii) have short-ended paths for the fast lithium ion diffusion, and (iii) open nanopores holding electrolyte. The reversible capacity is up to 666 mAh/g. This is the first example of an organic 2D COF for an anode of lithium-ion battery and represents an important step toward the use of COFs in the next-generation high-performance lithium-ion battery.