A fast-charging/discharging and long-term stable artificial electrode enabled by space charge storage mechanism

Linyi Zhao, Tiansheng Wang, Fengkai Zuo, Zhengyu Ju, Yuhao Li, Qiang Li, Yue Zhu (), Hongsen Li () and Guihua Yu ()
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Linyi Zhao: Qingdao University
Tiansheng Wang: Qingdao University
Fengkai Zuo: Qingdao University
Zhengyu Ju: The University of Texas at Austin
Yuhao Li: Qingdao University
Qiang Li: Qingdao University
Yue Zhu: The University of Texas at Austin
Hongsen Li: Qingdao University
Guihua Yu: The University of Texas at Austin

Nature Communications, 2024, vol. 15, issue 1, 1-12

Abstract: Abstract Lithium‐ion batteries with fast-charging/discharging properties are urgently needed for the mass adoption of electric vehicles. Here, we show that fast charging/discharging, long-term stable and high energy charge-storage properties can be realized in an artificial electrode made from a mixed electronic/ionic conductor material (Fe/LixM, where M = O, F, S, N) enabled by a space charge principle. Particularly, the Fe/Li2O electrode is able to be charged/discharged to 126 mAh g−1 in 6 s at a high current density of up to 50 A g−1, and it also shows stable cycling performance for 30,000 cycles at a current density of 10 A g−1, with a mass-loading of ~2.5 mg cm−2 of the electrode materials. This study demonstrates the critical role of the space charge storage mechanism in advancing electrochemical energy storage and provides an unconventional perspective for designing high-performance anode materials for lithium-ion batteries.

Date: 2024
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DOI: 10.1038/s41467-024-48215-2

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