Biomimetic Sn4 P3 Anchored on Carbon Nanotubes as an Anode for High-Performance Sodium-Ion Batteries

ACS Nano
Lingbing RanRuth Knibbe

Abstract

Recently, Sn4P3 has emerged as a promising anode for sodium-ion batteries (SIBs) due to the high specific capacity. However, the use of Sn4P3 has been impeded by capacity fade and an inferior rate performance. Herein, a biomimetic heterostructure is reported by using a simple hydrothermal reaction followed by thermal treatment. This bottlebrush-like structure consists of a stem-like carbon nanotube (CNT) as the electron expressway and mechanical support; fructus-like Sn4P3 nanoparticles as the active material; and the permeable stoma-like thin carbon coating as the buffer layer. Having benefited from the biomimetic structure, a superior electrochemical performance is obtained in the SIBs. It exhibits a high capacity of 742 mA h g-1 after 150 cycles at 0.2C, and superior rate performance with 449 mA h g-1 at 2C after 500 cycles. Moreover, the sodium storage mechanism is confirmed by cyclic voltammetry and ex situ X-ray diffraction and transmission electron microscopy. In situ electrochemical impedance spectroscopy was adopted to analyze the reaction dynamics. This research represents a further step toward figuring out the inferior electrochemical performance of other metal phosphide materials.

References

Nov 19, 2011·Science·Bruce DunnJean-Marie Tarascon
Apr 9, 2014·Advanced Materials·Youngjin KimKyu Tae Lee
Mar 1, 2016·Chemical Communications : Chem Comm·Sang-Ok Kim, Arumugam Manthiram
Mar 24, 2016·Proceedings of the National Academy of Sciences of the United States of America·Yuanyue LiuWilliam A Goddard
Mar 7, 2017·Nature Communications·Kwadwo Asare OwusuLiqiang Mai
Mar 10, 2018·Nature Communications·Hao ShanJianbo Wu

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Citations

Aug 3, 2021·Journal of Colloid and Interface Science·Xinyi ZhangZhijiang Cai
Aug 12, 2021·ACS Applied Materials & Interfaces·Lingbing RanRuth Knibbe

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