Phase Conversion Accelerating "Zn-Escape" Effect in ZnSe-CFs Heterostructure for High Performance Sodium-Ion Half/Full Batteries.

Autor: Dong WD; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan, Hubei, 430070, China., Li CF; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan, Hubei, 430070, China.; Nanostructure Research Centre (NRC), Wuhan University of Technology, 122 Luoshi Road, Wuhan, Hubei, 430070, China., Wang CY; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan, Hubei, 430070, China., Wu L; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan, Hubei, 430070, China., Hu ZY; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan, Hubei, 430070, China.; Nanostructure Research Centre (NRC), Wuhan University of Technology, 122 Luoshi Road, Wuhan, Hubei, 430070, China., Liu J; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan, Hubei, 430070, China., Chen LH; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan, Hubei, 430070, China., Li Y; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan, Hubei, 430070, China., Su BL; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan, Hubei, 430070, China.; Laboratory of Inorganic Materials Chemistry (CMI), University of Namur, 61 rue de Bruxelles, Namur, 5000, Belgium.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2022 Oct; Vol. 18 (43), pp. e2105169. Date of Electronic Publication: 2021 Nov 28.
DOI: 10.1002/smll.202105169
Abstrakt: 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.
(© 2021 Wiley-VCH GmbH.)
Databáze: MEDLINE
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