2 D MXene‐based Energy Storage Materials: Interfacial Structure Design and Functionalization

Abstract

Transition metal carbides and/or nitrides (MXenes), a burgeoning group of 2 D layer‐structure compounds, have multiple merits, such as high electrical conductivity, tunable layer structure, small band gap, and functionalized redox‐active surface, and are receiving significant attention as one of the most promising class of energy storage materials. The synthesis methods, structural configuration, and surface chemistry of MXenes directly influence their performance. This Minireview focuses on interfacial structure design and functionalization of MXenes and MXene‐based energy storage materials and the effect of structural configuration and surface chemistry on their electrochemical performance. Additionally, the structure–property relationships between interfacial structure, functional group, interlayer spacing, and the corresponding energy storage performance are summarized in detail. Finally, light is shed on the perspectives for the future research on advanced MXene‐based energy storage materials including scientific and technical challenges.

Partial Atomic Tin Nanocomplex Pillared Few-Layered Ti3C2Tx MXenes for Superior Lithium-Ion Storage

“…Due to absorbed T x groups, MXene nanosheet is negatively charged, which is also one of the basic properties of MXene colloids and consistent with the result of zeta potential test ( Fig. S5) [37]. MXene nanosheets can be uniformly dispersed in colloidal state because of electrostatic repulsion among different nanosheets.…”

Interfacial structure design of MXene‐based nanomaterials for electrochemical energy storage and conversion

“…[33][34][35] The unique characteristics of MXenes, including high electrical conductivity, large redox active surface area, rich surface chemistry, and tunable structures have rendered them extremely practical for electrochemical energy storage and conversion applications. 36 Although there have been some reviews that summarized the synthesis, properties, and applications of MXenes, [37][38][39][40][41][42] less attention has been paid to the underlying structural design principle and regulation mechanisms of MXene-based architectures. Therefore, it is highly desirable to have a comprehensive understanding on the interfacial structure design of MXene-based nanomaterials for electrochemical energy storage and conversion applications.…”

Tuning 2D MXenes by Surface Controlling and Interlayer Engineering: Methods, Properties, and Synchrotron Radiation Characterizations

“…Synchrotron‐based characterizations have also shown great applicability and accuracy in the study of electronic structure and corresponding reaction mechanism of MXenes. Although there are kinds of professional reviews focusing on different priorities of MXenes, [ 15 ] few was concentrated on the comprehensive summary of synchrotron‐based characterizations on exploration of the MXenes with surface modification and interlayer optimization. Therefore, in this review, we mainly focus on the recent works on surface controlling, interlayer engineering, synchrotron radiation characterizations and applications of MXenes for the vast of audience who is interested in MXenes as shown in Figure .…”