Double-Walled NiTeSe–NiSe2 Nanotubes Anode for Stable and High-Rate Sodium-Ion Batteries

Han Wu, Ke Wang, Mengjun Li, Yutao Wang, Zhu Zhu, JialeLiang, Zhuzhu Du, Wei Ai, Song He, Ruilong Yuan, Binwu Wang, Pan He, Jinsong Wu

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16 引用 (Scopus)

摘要

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–NiSe2 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–NiSe2 double-walled nanotubes and underlying mechanism of the enhanced performance are revealed by in situ and ex situ transmission electron microscopy and theoretical calculations.

源语言英语
文章编号2300162
期刊Small
19
22
DOI
出版状态已出版 - 1 6月 2023

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