15August2020

Nano-Micro Letters

Facile Synthesis of FePS3 Nanosheets@MXene Composite as a High-Performance Anode Material for Sodium Storage

Yonghao Ding1, Yu Chen1, Na Xu1, Xintong Lian1, Linlin Li1, *, Yuxiang Hu2, *, Shengjie Peng1, *

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Nano-Micro Lett. (2020) 12: 54

First Online: 18 February 2020 (Article)

DOI:10.1007/s40820-020-0381-y

*Corresponding author. E-mail: lilinlin@nuaa.edu.cn (Linlin Li); y.hu@uq.edu.au (Yuxiang Hu); pengshengjie@nuaa.edu.cn (Shengjie Peng)

 

Abstract

 


Toc

Searching for advanced anode materials with excellent electrochemical properties in sodium-ion battery is essential and imperative for next generation energy storage system to solve the energy shortage problem. In this work, two-dimensional (2D) ultrathin FePS3 nanosheets, a typcial ternary metal phosphosulfide, are first prepared by ultrasonic exfoliation. The novel 2D/2D heterojunction of FePS3 nanosheets@MXene composite is then successfully synthesized by in situ mixing ultrathin MXene nanosheets with FePS3 nanosheets. The resultant FePS3 nanosheets@MXene hybrids can increase the electronic conductivity and specific surface area, assuring excellent surface and interfacial charge transfer abilities. Furthermore, the unique heterojunction endows FePS3 nanosheets@MXene composite to promote the diffusion of Na+, and alleviate the drastic change of volume in the cyclic process, enhancing the sodium storage capability. Consequently, the few-layer FePS3 nanosheets uniformly coated by ultrathin MXene provides an exceptional reversible capacity of 676.1 mAh g-1 at the current of 100 mA g-1 after 90 cycles, which is equivalent to around 90.6% of the 2nd cycle capacity (746.4 mAh g-1). This work provides a originality protocol for constructing 2D/2D material and demonstrates the FePS3@MXene composite as a potential anode material with excellent property for sodium ion batteries.


 

Keywords

Anode; Composite; FePS3 nanosheets; MXene; Sodium ion battery

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