Novel Synthesis of Red Phosphorus Nanodot/Ti3C2Tx MXenes from Low-Cost Ti3SiC2 MAX Phases for Superior Lithium- And Sodium-Ion Batteries

Shunlong Zhang, Xiao Yan Li, Wentao Yang, Huajun Tian, Zhongkang Han, Hangjun Ying, Guoxiu Wang, Wei Qiang Han

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

MXenes, synthesized from MAX, have emerged as new energy-storage materials for a good combination of metallic conductivity and rich surface chemistry. The reported MXenes are synthesized mostly from Al-based MAX. It is still a big challenge to synthesize MXenes from abundant Si-based MAX because of its strong Ti-Si bonds. Here, we report for the first time a high-energy ultrasonic cell-crushing extraction method to successfully prepare Ti3C2Tx MXenes from Si-based MAX using a single low-concentration etchant. This novel strategy for preparing MXenes has a high extraction efficiency and is a fast preparation process of less than 2 h for selective etching of Si. Furthermore, through the high-energy ball-milling technology, unique P-O-Ti bonded red phosphorus nanodot/Ti3C2Tx (PTCT) composites were successfully prepared, which enable superior electrochemical performance in lithium- and sodium-ion batteries because of the double-morphology structure, where the amorphous nano red phosphorus particles were strongly absorbed to Ti3C2Tx MXene sheets, facilitating the transport of alkali ions during cycling processes. This novel synthesis method of Ti3C2Tx MXenes from Si-based MAX and unique P-O-Ti bonded PTCT composites opens a new door for preparing high-performance MXene-based materials and facilitating the development of low-cost MXenes and other two-dimensional materials for next-generation energy storage.

Original languageEnglish
Pages (from-to)42086-42093
Number of pages8
JournalACS Applied Materials and Interfaces
Volume11
Issue number45
DOIs
Publication statusPublished - 13 Nov 2019
Externally publishedYes

Keywords

  • chemical bond
  • MXenes
  • nanodots
  • red phosphorus
  • TiSiC (MAX) phases

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