A fast-charging/discharging and long-term stable artificial electrode enabled by space charge storage mechanism.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 38710689.
- Also identified by DOI 10.1038/s41467-024-48215-2 and PMC identifier 11074309.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
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/Li<sub>x</sub>M, where M = O, F, S, N) enabled by a space charge principle. Particularly, the Fe/Li<sub>2</sub>O electrode is able to be charged/discharged to 126 mAh g<sup>-1</sup> in 6 s at a high current density of up to 50 A g<sup>-1</sup>, and it also shows stable cycling performance for 30,000 cycles at a current density of 10 A g<sup>-1</sup>, with a mass-loading of ~2.5 mg cm<sup>-2</sup> 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.