A Nitrogen‐Rich 2D sp2‐Carbon‐Linked Conjugated Polymer Framework as a High‐Performance Cathode for Lithium‐Ion Batteries. Issue 3 (11th December 2018)

• Record Type: Journal Article
• Authors: Xu, Shunqi; Wang, Gang; Biswal, Bishnu P.; Addicoat, Matthew; Paasch, Silvia; Sheng, Wenbo; Zhuang, Xiaodong; Brunner, Eike; Heine, Thomas; Berger, Reinhard; Feng, Xinliang
• Is Part Of: Angewandte Chemie international edition. Volume 58:Issue 3(2019)
• Page Start: 849
• Page End: 853
• Publication Date: 2018-12-11
• Subjects: cathode materials -- conjugated polymer frameworks -- gas adsorption -- nitrogen doping -- sp2 carbon; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201812685
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: A two‐dimensional (2D) sp 2 ‐carbon‐linked conjugated polymer framework (2D CCP‐HATN) has a nitrogen‐doped skeleton, a periodical dual‐pore structure and high chemical stability. The polymer backbone consists of hexaazatrinaphthalene (HATN) and cyanovinylene units linked entirely by carbon–carbon double bonds. Profiting from the shape‐persistent framework of 2D CCP‐HATN integrated with the electrochemical redox‐active HATN and the robust sp 2 carbon‐carbon linkage, 2D CCP‐HATN hybridized with carbon nanotubes shows a high capacity of 116 mA h g −1, with high utilization of its redox‐active sites and superb cycling stability (91 % after 1000 cycles) and rate capability (82 %, 1.0 A g −1 vs. 0.1 A g −1 ) as an organic cathode material for lithium‐ion batteries. Abstract : Doping for performance : A 2D sp 2 ‐carbon‐linked conjugated polymer (2D CCP) framework with a nitrogen‐doped skeleton and multiple redox‐active sites consists of hexaazatrinaphthalene (HATN) and cyanovinylene units linked entirely by carbon–carbon double bonds. Hybridization with carbon nanotubes results in an excellent cathode material for lithium‐ion batteries.