In:
Small, Wiley, Vol. 19, No. 22 ( 2023-06)
Abstract:
Electrodes made of composites with heterogeneous structure hold great potential for boosting ionic and charge transfer and accelerating electrochemical reaction kinetics. Herein, hierarchical and porous double‐walled NiTeSe–NiSe 2 nanotubes are synthesized by a hydrothermal process assisted in situ selenization. Impressively, the nanotubes have abundant pores and multiple active sites, which shorten the ion diffusion length, decrease Na + diffusion barriers, and increase the capacitance contribution ratio of the material at a high rate. Consequently, the anode shows a satisfactory initial capacity (582.5 mA h g −1 at 0.5 A g −1 ), a high‐rate capability, and long cycling stability (1400 cycles, 398.6 mAh g −1 at 10 A g −1 , 90.5% capacity retention). Moreover, the sodiation process of NiTeSe–NiSe 2 double‐walled nanotubes and underlying mechanism of the enhanced performance are revealed by in situ and ex situ transmission electron microscopy and theoretical calculations.
Type of Medium:
Online Resource
ISSN:
1613-6810
,
1613-6829
DOI:
10.1002/smll.202300162
Language:
English
Publisher:
Wiley
Publication Date:
2023
detail.hit.zdb_id:
2168935-0
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