材料科学
锂(药物)
共价键
聚合物
共轭体系
阳极
化学工程
电化学
纳米技术
共轭微孔聚合物
电极
高分子化学
有机化学
物理化学
复合材料
化学
内分泌学
工程类
医学
作者
Shu‐Biao Xia,Yu-Qing Cai,Lei Yao,Jingwen Shi,Feixiang Cheng,Jian‐Jun Liu,Zhengjiang He,Junchao Zheng
标识
DOI:10.1016/j.ensm.2022.05.021
摘要
The feasibility of assorted characteristics of fast charge-transport, abundance active sites, and controlled molecular designing of the π-conjugated porous two-dimensional covalent organic polymer offers exclusive alternative electrode materials for lithium storage. However, the functioning of an organic polymer electrode in terms of specific capacity, cycle life, and rate performance is still lacking. In this work, we report the theoretical design and corresponding practical development of a nitrogen-rich two-dimensional π-conjugated porous covalent quinazoline polymer (HAT-CQP). The results show that HAT-CQP as anode for lithium-ion batteries can produce an excellent electrochemical performance.The discharge-specific capacity reaches 478 mAh g−1 even after 510 cycles, and a 82.3% of capacity retention rate is acquired at 800 mAg−1. The X-ray photoelectron spectroscopy results along with theoretical calculations reveal that the designed structure of HAT-CQP can store 7 Li+ located on a pyrazine-like C=N and conjugated heterocycles.
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