A Nitrogen-Rich 2D sp2 -Carbon-Linked Conjugated Polymer Framework as a High-Performance Cathode for Lithium-Ion Batteries

Shunqi Xu; Gang Wang; Bishnu P Biswal; Matthew Addicoat; Silvia Paasch; Wenbo Sheng; Xiaodong Zhuang; Eike Brunner; Thomas Heine; Reinhard Berger; Xinliang Feng

doi:10.1002/anie.201812685

A Nitrogen-Rich 2D sp² -Carbon-Linked Conjugated Polymer Framework as a High-Performance Cathode for Lithium-Ion Batteries

Angew Chem Int Ed Engl. 2019 Jan 14;58(3):849-853. doi: 10.1002/anie.201812685. Epub 2018 Dec 11.

Authors

Shunqi Xu¹, Gang Wang¹, Bishnu P Biswal^{1

2}, Matthew Addicoat^{3

4}, Silvia Paasch⁵, Wenbo Sheng⁶, Xiaodong Zhuang¹, Eike Brunner⁵, Thomas Heine³, Reinhard Berger¹, Xinliang Feng¹

Affiliations

¹ Center for Advancing Electronics Dresden (cfaed) and Department of Chemistry and Food Chemistry, Technische Universität Dresden, Mommsenstrasse 4, 01069, Dresden, Germany.
² Present address: Max-Planck-Institute for Solid State Research, Stuttgart, Germany.
³ Wilhelm-Ostwald-Institute for Physical and Theoretical Chemistry, Leipzig University, Germany.
⁴ Present address: Nottingham Trent University, Nottingham, UK.
⁵ Chair of Bioanalytical Chemistry, Technische Universität Dresden, Germany.
⁶ Chair of Macromolecular Chemistry, Technische Universität Dresden, Germany.

PMID: 30461145
DOI: 10.1002/anie.201812685

Abstract

A two-dimensional (2D) sp² -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 sp² 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.

Keywords: cathode materials; conjugated polymer frameworks; gas adsorption; nitrogen doping; sp2 carbon.

Grants and funding

696656/H2020 European Research Council