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A star-shaped polyimide covalent organic framework for high-voltage lithium-ion batteries

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Abstract

Covalent organic frameworks are promising electrode materials for energy storage due to their uniform active sites, abundant pores, and high stability. However, the reported COF electrodes often display low discharge voltage, which limits their further applications. In this work, N,N,N,N-tetraphenylphenylenediamine (TPPDA) units were used to construct a novel polyimide COF, which exhibited a unique star-shaped structure. The COF material was used as positive electrode for lithium-ion batteries and displayed a high discharge voltage up to 3.6 V, higher than almost all the COF electrode materials. The TPPDA units were demonstrated as the redox active sites and exhibited a two-electron redox processes, which were featured by the redox of TPPDA radical cations and the insertion/extraction of PF6- anions. This work offers a new strategy to design novel COF materials and develop high-voltage organic electrodes for energy storage.
Original languageEnglish
Pages (from-to)2545–2550
JournalMaterials Chemistry Frontiers
Volume6
Issue number17
Online published15 Jul 2022
DOIs
Publication statusPublished - 7 Sept 2022

Funding

The authors acknowledge the supports from the Basic Research Project of the Science and Technology Innovation Commission of Shenzhen (No. JCYJ20200109141640095), Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials (No. ZDSYS20200421111401738), the Leading Talents of Guangdong Province Program (No. 2016LJ06C536), the Guangdong-Hong Kong-Macao Joint Laboratory (No. 2019B121205001), the National Natural Science Foundation of China (No. 21875097), and the Hong Kong Research Grants Council (Project No. CityU 11218420). EPR spectra were obtained on the instruments from the SUSTech CRF. DFT calculations were supported by the Center for Computational Science and Engineering at the SUSTech.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 7 - Affordable and Clean Energy
    SDG 7 Affordable and Clean Energy

RGC Funding Information

  • RGC-funded

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