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- Title
Facile Synthesis of FePS<sub>3</sub> Nanosheets@MXene Composite as a High-Performance Anode Material for Sodium Storage.
- Authors
Ding, Yonghao; Chen, Yu; Xu, Na; Lian, Xintong; Li, Linlin; Hu, Yuxiang; Peng, Shengjie
- Abstract
Highlights: Few-layered FePS3 nanosheets and ultrathin MXene are obtained by liquid ultrasonic exfoliation. The novel 2D/2D heterojunction of FePS3 nanosheets@MXene composite is synthesized by in situ mixing MXene ultrathin nanosheets with FePS3 nanosheets. Such unique nanostructure can promote rapid reaction kinetics, prevents electrode pulverization and agglomeration for the volume expansion, and provides the pseudocapacitive contribution. 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 typical 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 in volume in the cyclic process, enhancing the sodium storage capability. Consequently, the few-layered FePS3 nanosheets uniformly coated by ultrathin MXene provide 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 second-cycle capacity (746.4 mAh g−1). This work provides an original protocol for constructing 2D/2D material and demonstrates the FePS3@MXene composite as a potential anode material with excellent property for sodium-ion batteries.
- Subjects
ENERGY storage; HETEROJUNCTIONS; ANODES; SURFACE conductivity; SURFACE charges; MECHANICAL properties of condensed matter
- Publication
Nano-Micro Letters, 2020, Vol 12, Issue 1, pN.PAG
- ISSN
2311-6706
- Publication type
Article
- DOI
10.1007/s40820-020-0381-y