Microbe-Assisted Assembly of Ti₃C₂T_x MXene on Fungi-Derived Nanoribbon Heterostructures for Ultrastable Sodium and Potassium Ion Storage

Abstract

As a typical family of two-dimensional (2D) materials, MXenes present physiochemical properties and potential for use in energy storage applications. However, MXenes suffer some of the inherent disadvantages of 2D materials, such as severe restacking during processing and service and low capacity of energy storage. Herein, a MXene@N-doped carbonaceous nanofiber structure is designed as the anode for high-performance sodium-and potassium-ion batteries through an in situ bioadsorption strategy; that is, Ti 3 C 2 T x nanosheets are assembled onto Aspergillus niger biofungal nanoribbons and converted into a 2D/1D heterostructure. This microorganism-derived 2D MXene-1D N-doped carbonaceous nanofiber structure with fully opened pores and transport channels delivers high reversible capacity and long-term stability to store both Na + (349.2 mAh g −1 at 0.1A g −1 for 1000 cycles) and K + (201.5 mAh g −1 at 1.0 A g −1 for 1000 cycles). Ion-diffusion kinetics analysis and density functional theory calculations reveal that this porous hybrid structure promotes the conduction and transport of Na and K ions and fully utilizes the inherent advantages of the 2D material. Therefore, this work expands the potential of MXene materials and provides a good strategy to address the challenges of 2D energy storage materials. KEYWORDS: biosorption, Ti 3 C 2 T x MXenes, porous hybrid fibers, sodium-ion batteries, potassium-ion batteries, density functional theory calculations

Intriguing electronic, optical and photocatalytic performance of BSe, M2CO2monolayers and BSe–M2CO2(M = Ti, Zr, Hf) van der Waals heterostructures

“…[28][29][30][31] These vdW heterostructures are also utilized to create electronic and optoelectronic devices with novel physical properties and applications. [32][33][34][35][36][37] MXenes-based vdW heterostructures, such as MXenes-MXenes, 38 MXene and nitrogen-doped graphene, 39 MXenes-TMDCs, 40 MXene-blue phosphorene, 41 MXenes and B-doped graphene, 42 have already been fabricated and investigated in detail. BSe, another 2D material, has been proposed and predicted to be thermally stable with indirect bandgap nature.…”

Strongly Coupled 2D Transition Metal Chalcogenide-MXene-Carbonaceous Nanoribbon Heterostructures with Ultrafast Ion Transport for Boosting Sodium/Potassium Ions Storage

“…Two dimensional (2D) nanomaterials greatly promote the progress of energy storage technologies and the application of rechargeable batteries, thanks to their higher interfacial chemical activity, shortened diffusion pathways of ions, and enhanced in-plane carrier or charge mobilization kinetics, in comparison to the materials in other dimensions [6]. MXenes, an emerging 2D transitional metal carbides or nitrides, have drawn intensive research attentions in energy storages by virtue of their unique physicochemical properties, such as rich surficial groups, metallic conductivity, and chemical compatibility [7][8][9][10]. Nevertheless, the deficiencies of easy self-aggregation, unsatisfying ions accessibility, and low theoretical capacity are generally inevitable for MXenes, because of the hydrogen bonds or van der Walls interactions between the laminated adjacent layers.…”

Room-Temperature Assembled MXene-Based Aerogels for High Mass-Loading Sodium-Ion Storage

“…5 d), which suggests that the charge storage process in the is predominantly controlled by a fast capacitive behavior [ 54 ]. The contributions of surface-driven capacitive reactions at different scan rates ( k 1 ν) can be evaluated based on the formula of i = k 1 ν + k 2 ν 1/2 [ 7 ]. As summarized in Fig.…”