Résumé
Sodium-ion batteries (SIBs) are considered as a promising large-scale energy storage system owing to the abundant and low-cost sodium resources. However, their practical application still needs to overcome some problems like slow redox kinetics and poor capacity retention rate. Here, a high-performance ZnSe/carbon fibers (ZnSe-CFs) anode is demonstrated with high electrons/Na+ transport efficiency for sodium-ion half/full batteries by engineering ZnSe/C heterostructure. The electrochemical behavior of the ZnSe-CFs heterostructure anode is deeply studied via in situ characterizations and theoretical calculations. Phase conversion is revealed to accelerate the “Zn-escape” effect for the formation of robust solid electrolyte interphase (SEI). This leads to the ZnSe-CFs delivering a superior rate performance of 206 mAh g−1 at 1500 mA g−1 for half battery and an initial discharge capacity of 197.4 mAh g−1 at a current density of 1 A g−1 for full battery. The work here heralds a promising strategy to synthesize advanced heterostructured anodes for SIBs, and provides the guidance for a better understanding of phase conversion anodes.
langue originale | Anglais |
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Numéro d'article | 2105169 |
journal | Small |
Volume | 18 |
Numéro de publication | 43 |
Les DOIs | |
Etat de la publication | Publié - 26 oct. 2022 |
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Physico-chimie et caractérisation (PC2)
Johan Wouters (!!Manager) & Carmela Aprile (!!Manager)
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