Programmable Diacetylene‐Bridged Cyclotetrathiophenes With Nonplanar π‐Expanded Skeleton for Electrochemical Sodium Storage
Abstract
ABSTRACT Fused aromatic ring systems offer flexibility in molecular‐level design, facilitating programmable redox activity and exhibiting remarkable energy‐storage performance. Nevertheless, the planar backbone structure and strong π–π stacking significantly impede their practical capacity and cycle stability. Herein, we present a novel three‐dimensional (3D) polymer, diacetylene‐linked cyclic tetrathiophene ( 3D‐PTE‐COTh ) with a partial crystalline structure, which is based on the thiophene‐fused [8]cycloene framework and intramolecular acetylene connecting wires. This construction exploits the electrochemically induced micro‐telescopic behavior regulated by Hückel's rule, allowing for dynamic conformational alterations that alleviate π–π stacking effects. Simultaneously, the combination of fused thiophene and graphdiyne‐like linkages improves electronic conductivity and introduces a plethora of electron‐deficient redox‐active sites. As a cathode material, the synergistic sodium storage of the cyclooctatetraene (C 8 ring), ─C≡C─C≡C─ bonds, and fused‐thiophene enables 3D‐PTE‐COTh to achieve a high specific capacity of 347.9 mAh g −1 at 0.5 A g −1 , thereby presenting new prospects for the design of advanced organic electrode materials.
Article Details
Authors (13)
Honghui Hu
National Base for International Science & Technology Cooperation Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, School of Chemistry Xiangtan University Xiangtan P. R. China
Yu Mei
College of Chemistry and Chemical Engineering
Mingjun Jing
National Base for International Science & Technology Cooperation Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, School of Chemistry Xiangtan University Xiangtan P. R. China
Jinyang Wu
National Base for International Science & Technology Cooperation Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, School of Chemistry Xiangtan University Xiangtan P. R. China
Tianjing Wu
National Base for International Science & Technology Cooperation Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, School of Chemistry Xiangtan University Xiangtan P. R. China
Jinzhi Yuan
National Base for International Science & Technology Cooperation Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, School of Chemistry Xiangtan University Xiangtan P. R. China
Zichun Zhang
Institute of Chemical Biology
Yong Pei
Department of Chemistry, Key Laboratory of Environmentally Friendly Chemistry and Applications of MOE, Xiangtan University, Xiangtan 411105, China
Cheng Cheng
Yujie Huang
State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources/Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences
Hongshuai Hou
College of Chemistry and Chemical Engineering
Xianyou Wang
National Base for International Science & Technology Cooperation Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, School of Chemistry Xiangtan University Xiangtan P. R. China
Xiaobo Ji
College of Chemistry and Chemical Engineering