Integrated MXene&CoFe2O4 electrodes with multi-level interfacial architectures for synergistic lithium-ion storage

Abstract

Interfacial contacts within electrodes largely affect electronic transport and ion migration. Nanoscale electrode materials can achieve high reactivity, but their large interfacial contact areas lead to unavoidable impedance. Herein, a Ti₃C₂T_x MXene was used to construct a hybrid three-dimensional electrode material with a bilayer feature via a two-step vacuum filtration process. The introduced MXene flakes contributed to the electrode capacity, increased the electronic/ionic conductivity as a conductor and current collector, and enhanced the mechanical behaviour of the electrode by acting as a substrate. Such bilayer hybrid electrode design achieved promising cycling stability, and unlock an electrode architecture that can be applied to a wide range of two-dimensional materials.