In-situ construction of Ti3C2TX/Ni-HHTP heterostructure as anode for lithium-ion batteries

Abstract

Pursuing anode materials with high specific capacity and long cycle stability is critical for advanced lithium-ion batteries (LIBs). Metal-organic frameworks (MOFs) with high specific surface area, regular pore channels, and multiple active sites are promising anode materials for LIBs. However, the poor electronic conductivity limits their application in LIBs. Thus, introducing some conducting materials is necessary. MXene, known for its excellent electronic conductivity in electrochemical energy storage systems, is an ideal candidate. Herein, a heterostructure composite material (Ti3C2TX/Ni-HHTP) that combines the advantages of both MOFs and MXene has been synthesized via an in-situ growth method, the composite exhibits regular pore channels, enhanced electronic conductivity, and excellent stability. When it is used as an anode material in LIBs, the composite presents satisfying rate performance and cycling stability. The initial discharge capacity of the Ti3C2TX/Ni-HHTP electrode exhibits 424.4 mA h g−1 at 0.5 A g−1 and remains at 390.2 mA h g−1 after 800 cycles with a capacity retention rate of 92.0%. This design strategy provides valuable insights into constructing MOF hybrid materials with enhanced electronic conductivity for various electrochemical applications.