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

• DOI: 10.1021/acsami.9b13308
• Publication Date: 2019-10-22T09:42:51Z
• Authors: Shunlong Zhang; Xiao-Yan Li; Wentao Yang; Huajun Tian; Zhongkang Han; Hangjun Ying; Guoxiu Wang; Wei-Qiang Han
• Keywords: MXenes; MAX phases; Nanodot

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