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Boosting a practical Li-CO2 battery through dimerization reaction based on solid redox mediator

Author

Listed:
  • Wei Li

    (National Laboratory of Solid-State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University)

  • Menghang Zhang

    (National Laboratory of Solid-State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University)

  • Xinyi Sun

    (National Laboratory of Solid-State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University)

  • Chuanchao Sheng

    (National Laboratory of Solid-State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University)

  • Xiaowei Mu

    (National Laboratory of Solid-State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University)

  • Lei Wang

    (National Laboratory of Solid-State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University)

  • Ping He

    (National Laboratory of Solid-State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University)

  • Haoshen Zhou

    (National Laboratory of Solid-State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University)

Abstract

Li-CO2 batteries offer a promising avenue for converting greenhouse gases into electricity. However, the inherent challenge of direct electrocatalytic reduction of inert CO2 often results in the formation of Li2CO3, causing a dip in output voltage and energy efficiency. Our innovative approach involves solid redox mediators, affixed to the cathode via a Cu(II) coordination compound of benzene-1,3,5-tricarboxylic acid. This technique effectively circumvents the shuttle effect and sluggish kinetics associated with soluble redox mediators. Results show that the electrochemically reduced Cu(I) solid redox mediator efficiently captures CO2, facilitating Li2C2O4 formation through a dimerization reaction involving a dimeric oxalate intermediate. The Li-CO2 battery employing the Cu(II) solid redox mediator boasts a higher discharge voltage of 2.8 V, a lower charge potential of 3.7 V, and superior cycling performance over 400 cycles. Simultaneously, the successful development of a Li-CO2 pouch battery propels metal-CO2 batteries closer to practical application.

Suggested Citation

  • Wei Li & Menghang Zhang & Xinyi Sun & Chuanchao Sheng & Xiaowei Mu & Lei Wang & Ping He & Haoshen Zhou, 2024. "Boosting a practical Li-CO2 battery through dimerization reaction based on solid redox mediator," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-45087-4
    DOI: 10.1038/s41467-024-45087-4
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    References listed on IDEAS

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    1. Yiyin Mao & Junwei Li & Wei Cao & Yulong Ying & Pan Hu & Yu Liu & Luwei Sun & Hongtao Wang & Chuanhong Jin & Xinsheng Peng, 2014. "General incorporation of diverse components inside metal-organic framework thin films at room temperature," Nature Communications, Nature, vol. 5(1), pages 1-9, December.
    2. T. F. Keenan & X. Luo & M. G. Kauwe & B. E. Medlyn & I. C. Prentice & B. D. Stocker & N. G. Smith & C. Terrer & H. Wang & Y. Zhang & S. Zhou, 2021. " RETRACTED ARTICLE: A constraint on historic growth in global photosynthesis due to increasing CO2," Nature, Nature, vol. 600(7888), pages 253-258, December.
    3. Xinyi Sun & Xiaowei Mu & Wei Zheng & Lei Wang & Sixie Yang & Chuanchao Sheng & Hui Pan & Wei Li & Cheng-Hui Li & Ping He & Haoshen Zhou, 2023. "Binuclear Cu complex catalysis enabling Li–CO2 battery with a high discharge voltage above 3.0 V," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
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