Abstract
? 2022V2CTx MXene shows excellent potential in lithium-ion batteries (LIBs) due to its unique two-dimensional structure and rich surface chemistry. However, the low Li+-storage capacity contributed by the innate low conductivity seriously hinders its commercial application. Herein, Ag nanoparticles are grafted on the V2CTx MXene by a one-step reduced silver nitrate (AgNO3). The obtained Ag nanoparticles are directly reduced from AgNO3 by the -OH terminations of V2CTx MXene, which promote the conductivity of V2CTx/Ag. Besides, the Ag nanoparticles in the layered body structure have excellent structural strength, which boost the whole durability of the LIB by inhibiting the aggregation of V2CTx MXene. Further, the dependence of the battery performances on the Ag contents is investigated. We find that the most favorable Ag content is 4.0 at% which can simultaneously favor the transferability of electron and ion and the electrochemical kinetics to the most considerable extent. The V2CTx/Ag-40 achieves a specific capacity of 631 mAh g?1 at 0.05 A g?1 after 50 cycles, and even maintains a specific capacity of 298 mAh g?1 at 5 A g?1 after long-term 2000 cycles. The adopted in situ reduction strategy and the excellent electrochemical property of V2CTx/Ag nanostructure may be relevant for future anode material in LIBs.
NSTL
Elsevier