Integrating Multiredox Centers into One Framework for High-Performance Organic Li-Ion Battery Cathodes

Chunyu Cui, Xiao Ji, Peng Fei Wang, Gui Liang Xu, Long Chen, Ji Chen, Hacksung Kim, Yang Ren, Fu Chen, Chongyin Yang, Xiulin Fan, Chao Luo*, Khalil Amine, Chunsheng Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Organic cathode materials are promising for developing high-energy and high-power Li-ion batteries (LIBs). However, the energy storage of most organic cathodes relies on the electron transfer of a single type of functional group, leading to either a low redox potential or a low capacity. Here we propose a new strategy for the structure design and performance optimization of organic materials. A new organic cathode, dithianon (DTN), containing three functional groups (-S-, C-O, CN) in one framework, is reported. The -S- group increases the redox potential to 3.0 V, while C-O and CN groups enable a three Li-ions-involved redox reaction. As a cathode, DTN delivers 270.2 mAh g-1 at 0.5C for 300 cycles. Even at 5C, it still retains 161.5 mAh g-1 after 1000 cycles. The high-capacity, high-power, and stable DTN cathode offers great promise for high-performance and sustainable LIBs.

Original languageEnglish (US)
Pages (from-to)224-231
Number of pages8
JournalACS Energy Letters
Volume5
Issue number1
DOIs
StatePublished - Jan 10 2020

ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry

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