Urchin-Like Fe3 Se4 Hierarchitectures: A Novel Pseudocapacitive Sodium-Ion Storage Anode with Prominent Rate and Cycling Properties

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Jian ZhangJun Chen

Abstract

Transition metal chalcogenides have received great attention as promising anode candidates for sodium-ion batteries (SIBs). However, the undesirable cyclic life and inferior rate capability still restrict their practical applications. The design of micro-nano hierarchitectures is considered as a possible strategy to facilitate the electrochemical reaction kinetics and strengthen the electrode structure stability upon repeated Na+ insertion/extraction. Herein, urchin-like Fe3 Se4 hierarchitectures are successfully prepared and developed as a novel anode material for SIBs. Impressively, the as-prepared urchin-like Fe3 Se4 can present an ultrahigh rate capacity of 200.2 mAh g-1 at 30 A g-1 and a prominent capacity retention of 99.9% over 1000 cycles at 1 A g-1 , meanwhile, a respectable initial coulombic efficiency of ≈100% is achieved. Through the conjunct study of in situ X-ray diffraction, ex situ X-ray absorption near-edge structure spectroscopy, as well as cyclic voltammetry curves, it is intriguing to reveal that the phase transformation from monoclinic to amorphous structure accompanied by the pseudocapacitive Na+ storage behavior accounts for the superior electrochemical performance. When paired with the Na3 V2 (PO4 )3 cat...Continue Reading

References

Sep 27, 2014·Small·Jingjing WangChunsheng Wang
Nov 13, 2014·Chemical Reviews·Naoaki YabuuchiShinichi Komaba
Feb 6, 2015·Angewandte Chemie·Dipan KunduLinda F Nazar
Apr 23, 2015·Advanced Materials·Kai ZhangJun Chen
Apr 7, 2016·Nano Letters·Yongchang LiuJun Chen
Aug 17, 2016·Advanced Materials·Xusheng WangMianqi Xue
Dec 13, 2016·ACS Applied Materials & Interfaces·Shaohua ZhuLiqiang Mai
Jun 29, 2017·Advanced Materials·Mengmeng LaoShi Xue Dou
Dec 22, 2017·Small·Yaru LiangShu-Lei Chou

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