In Situ Constructed Nife-Ldh@Ti3c2tx with Three-Dimensional Network Structure Enhanced Li+/Na+ Storage Via an Oxygen Bridge

In this work, NiFe-LDH@Ti3C2Tx with three-dimensional network structure was in situ prepared by a one-step hydrothermal method with the assistance of PVP and LAA additives. The crumpled NiFe-LDH nanosheets were anchored on the Ti3C2Tx surface in close face-to-face contact by heterogeneous nucleation and growth with oxygen-containing functional groups as active sites. More importantly, an oxygen bridge was simultaneously formed at the interface between NiFe-LDH and Ti3C2Tx, which, as an electron migration channel to form a connected conductive network, significantly enhanced structural stability and electron migration rate. Meanwhile, the open three-dimensional network (SBET: 125.6 m2 g-1) also enables the exposure of more active sites and accelerates the ion migration rate, leading to excellent diffusion kinetics. As a consequence, NiFe-LDH@Ti3C2Tx exhibits excellent electrochemical performance as anode for LIBs (987 mAh g-1 after 200 cycles at 0.5 A g-1 and 804 mAh g-1 after 400 cycles at 1 A g-1) and SIBs (280 mAh g-1 after 200 cycles at 0.5 A g-1 and 211 mAh g-1 after 2000 cycles at 1 A g-1).