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 journalArticle

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

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ASJC Scopus subject areas

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

Cite this

Cui, C., Ji, X., Wang, P. F., Xu, G. L., Chen, L., Chen, J., Kim, H., Ren, Y., Chen, F., Yang, C., Fan, X., Luo, C., Amine, K., & Wang, C. (2020). Integrating Multiredox Centers into One Framework for High-Performance Organic Li-Ion Battery Cathodes. ACS Energy Letters, 5(1), 224-231. https://doi.org/10.1021/acsenergylett.9b02466